This coming weekend the RTTC National 10 Mile Championships are taking place on the O10/1 course near Doncaster in South Yorkshire. The women’s and junior races takes place on Saturday and the men’s race is on the Sunday. Both days the first rider is off at 10am and the riders will be on course until around 11:20 on the Saturday and 12:10 on the Sunday. The course is identical both days though the weather forecast varies slightly.

Both days are currently slated to be dry, temperate and relatively windless so our forecasts will focus mostly on which day is the fastest. We will set up the riders each day as the same, with a cda of 0.21, a system mass of 75kg and an average power of 300W then see how the time evolves across the start time of each day.

The forecast

The margins are tight, and both days are pretty fast. Due to the shortness of a 10 mile TT it’s not an unrealistic scenario that the podium could be split with just a handful of seconds. We should expect to see some pretty fast times though, with good conditions for racing forecast.

You can prepare for the National 10 with myWindsock here.

On Sunday the 16th of August the RTTC National 12 hour time trial championships will be held in Monmouthshire on the R12/16 course. The first riders roll out at 6:01 and will be on the gas for the following 12 hours, completing as many laps of the course as they can in that time.

The Weather

A 12 hour time trial is quite a bleak endeavour, even for the most enthusiastic riders there’s always at least one portion of the race that leaves you questioning why you entered. Nothing would accelerate that moment quite like the freezing cold and the rain, however conditions appear to be on the side of the participants this year.

The Elevation Profile

One of the toughest things about a long time trial is the back breaking work of spending 12 hours in the TT bars. Every time you sit up, you lose a couple of metres from your result. Steeper hills and low wind speed sections can give riders the opportunity to sit up without paying a penalty.

As you may have noticed from the graphs, myWindsock has a new look thanks to our surface platform, which is currently under development. One new feature of this is we can write extensions, which are small snippets of code in a “high level” language called Lua. A high level language is one that’s reasonably close to written english, making the syntax easily decipherable such that learning to write these extensions can be done by anyone curious enough to try.

An example of extensions

We can use these extensions to take a look at the average speed changes as a rider sits up more or less frequently. Setting up a time interval, we can see what happens to the average speed if our rider sits up for 60s at the following intervals (for an 80kg system mass with an “in position” cda of 0.23 riding at 240W)…

• Every 3 hours: 40.1kph
• Once an hour: 40.1kph
• Every 30 minutes: 40.0kph
• Every 10 minutes: 39.6kph

All of the CTT courses are available in myWindsock. You can check it out here.

It’s well understood in cycling circles how good you need to be to win World Tour men’s races with a summit finish, but the data as to how fast you need to ride up a hill in the women’s field is a little more sparse and not reported on as widely. In 2026, the Tour de France Femmes goes up Mont Ventoux and the QOM on Strava is currently held by Illi Gardener with a time of 57:35. While Illi isn’t a World Tour rider, she’s an extremely accomplished climber having won the British Hill Climb Championships three times. As such, we can expect a similar-ish time from the fastest women in the Tour de France Femmes this year.

Mont Ventoux – The Segment

The QOM has a VAM (a measure of climbing speed) of almost exactly 1400m/hr. We can see the peak climbing performances from the women’s world tour mapped below.

A power to weight ratio of 5W/kg on 8.6% will lead to a VAM of (wind dependent, of course) around 1600m/hr, which will lead to a climbing time in the 50-52 minute range though this assumes no wind. The stage leading into the climb is pretty straightforward, which will lend itself to fast climbing.

How fast do you need to be?

The following table shows you the power to weight ratio, power at 60kg and the time you might expect to ride the climb on Stage 7 in order to achieve the listed results. We are assuming that, as is the case each year, the level continues to rise and it’ll take an all time great climbing performance to win the stage. For a climb of this length, that’ll be around 5.1W/kg to win the stage.

To win	5.1W/kg	306W	56:24
Top 20 on the stage	4.7 W/kg	282W	1:00:01
Top half of the field	4.5 W/kg	270W	1:02:06

All in, if you’re riding a climb of around an hour in length above 4.5W/kg, you’ve got what it takes to get round in a mountain stage of the Tour de France Femmes, presuming your bike handling and race sense is up to scratch. In order to win a mountain top finish you’re likely having to ride an hour long climb at or in excess of 5W/kg.

Top teams and riders will be using myWindsock to prepare for the stage. You can too by clicking here.

Tour de France Femmes 2026 Route stage 4 preview: Gevrey-Chambertin – Dijon. The race’s only individual time trial and the only course preview that takes account of the weather!

The first major GC shakeup is expected in the first stage of the Tour de France Femmes in the TT that takes place in the land of mustard, finishing in Dijon.

For the first 7 kilometres, the riders head straight towards Dijon. A left-hand turn in Marsannay-la-Côte takes the riders onto a false-flat drag uphill. Gradually, the gradient increases until they reach the climb proper. This is the Lacets de Marsannay, officially a 1.8-kilometre climb averaging 6.9%, although it is perhaps more accurately described as a 3-kilometre drag averaging 5.7%. This TT’s profile is not dissimilar from the men’s ITT stage a couple of weeks back, where we saw Remco Evenepoel deliver a clinic in how to time trial on a 5% gradient.

The route continues on rolling terrain for another 2 kilometres or so, before a 6-kilometre descent takes the riders to Dijon. There are no bends to speak of in this section, allowing the riders to descend at breakneck speeds and make full use of gravity. The descent will take place in the aero bars – important for assumptions for our prediction. The race finishes in the city centre of Dijon.

What will it take to win it?

Last year’s Tour de France Femmes was without a time trial (which should be illegal), however three years ago there was a similarly profiled lumpy TT in which Reusser prevailed. This year, our opinion is that Vollering will take victory, however we’re going to forecast what it’ll take to win.

In order to win this TT, we think a rider will need to hit the climb in the TT bars at around 6.2W/kg, which for a 60kg rider is a staggering power of 372W. This, combined with a world class cda of 0.175 on the flat and assumptions that the mechanics are setting the riders up perfectly, leads us to a predicted winning time of 26:37.

The starting point for this prediction was that, in order to be competitive with the performance of Vollering (assuming she’s here in peak shape), a rider will need to hit 6.2W/kg on the climb without breaking their aero position. They’ll go over their Critical Power and start using up their W’ allowance – essentially emptying the tank over the crest of the climb and holding on toward the finish.

The above time split used a Critical Power of 350W and a W’ of 16kJ for a 60kg rider. This particular pacing strategy leaves that rider with a minimum W’ balance of roughly 2kJ – which tells us there’s scope for a rider to potentially go harder than this on the climb. If this estimate is wrong, we’re forecasting that it’s more likely to be too conservative and it’s possible a rider will go toward the 26 minute mark, though breaking this seems unlikely.

The fact that the finish is tailwind descent also reduces the consequences for imploding on the time, as there’s a a pretty hard limit on the amount of time you can lose on that descent. In fact, if you stop pedalling after the top of the climb, you’d lose less than a minute on the run in to town with this pacing strategy. This means that riders may be more inclined to take a risk in their pacing on the climb, which further increases the chance our prediction will be beaten.

There’s only one time check on course, at 9.7km just before the proper crest of the hill. We should not expect massive swings from the intermediate check to the finish.

Riders hoping to be in the overall GC battle will need to ride the course under 28 minutes. This will limit their losses to around 90 seconds, anything more than that and you’re pretty much fully out the game. Race day conditions currently point to net tailwind for most of the TT which will help limit the losses of the weaker time trialists.

Join the many professional cyclists and teams using myWindsock to prepare here!

Runners are getting faster, whether it’s shoe tech, altitude or something in the water there’s no denying that the times are getting fast. As we know, aerodynamic resistance increases with the cube of speed which means the impact of aerodynamics becomes important very quickly. Recently, we’ve seen an example of this.

When Josh Kerr broke the mile world record he added his name to a list of record holders that had not been changed for 27 years. Clocking 3:42.66, the British 28-year-old took 0.47 off the world record running at a speed of 25.93 km/hour.

Kerr’s attempt was planned months in advance. Rather than quietly targeting the record, he publicly committed to it, building an entire training cycle around running one mile faster than anyone in history. Every decision was made with a single objective in mind.

Training, of course, was the foundation, but the margins came from everything around it. Kerr and coach Danny Mackey leaned heavily on physiological data, monitoring sleep, recovery and heart rate variability to balance workload and reduce the risk of overtraining. Away from the track, he installed an altitude chamber in his bedroom and an oxygen-enriched training room at home, allowing him to maximise adaptation between sessions.

World records aren’t solo efforts, and Kerr’s was no exception. Two pacemakers guided him through the opening laps at precisely the speed required for a 3:42 mile split, allowing him to settle into rhythm saving energy while drafting behind them. Kerr went through the first 400 metres in 55.3 seconds and then through 800 metres in 1:51.1.

By the final lap, with the pacemakers gone and a roaring London crowd behind him, the race became a battle against history. Kerr accelerated down the back straight and pulled clear of rival Yared Nuguse. Forty-five seconds later, he crossed the line in 3:42.66, becoming the fastest miler the sport has ever seen.

Josh Kerr didn’t visit a wind tunnel once during the preparation for this attempt, as far as I can tell. Should he have? He ran just shy of 26kph, speeds more commensurate with cycling than running. Aerodynamic drag in running is worth between 10 and 15 percent of the total work done against resistive forces. Perfect drafting is worth around a quarter of a second per lap, though this was “banked” and he used the first three laps worth of energy saving to empty his anaerobic energy stores in the final lap. This is about 0.75s worth of energy saved, slightly more time than the amount he broke the record by – it’s clear drafting helped him here.

During the final lap, without drafting, Josh Kerr ran 54.9 for the final 400m, this is a speed of 26.2kph and at this pace a 5% reduction in cda would save him a 10th of a second. To put that into “time trialese”, that would mean finding a saving of around 3W, this begs the question as to whether or not Josh Kerr should be wearing aero socks and aero sleeves.

The key takeaway for normal runners here is probably headwind related. It’s pretty hard for us mortals to get up to an air speed of 26kph unless we’re running into a headwind, but the energy savings of drafting if we’re running into a headwind can be significant, in the realms of 5 to 10 seconds over the course of a 5k Parkrun.

We’ve heard through the grape vine that some runners are using myWindsock to prepare for races, do the same by clicking here.

The second race against the clock has just taken place in this year’s Tour de France and it was an interesting watch from the perspective of an amateur time trialing enthusiast. The course started in Évian-les-Bains and was relatively short at only 26.1km in length, but the terrain made it truly challenging. The first 10km was completely uphill, with riders ascending the Côte de Larringes (a 9.6km climb at an average 4.2% gradient, though in real terms it was 9km at 5% then a plateau). From there, the road went back down again into a rolling, net downhill run-in to the finish in Thonon-les-Bains.

The synopsis was simple – a hard climb, a fast descent then a flat-ish bit. Watching the riders prepare and execute their races, as well as a little bit of insider knowledge, we took away some tips from watching the pros that can help you prepare for your next time trial.

The race played out as we might expect, the hilly course proving too difficult for the time trial specialists. World champion Remco Evenepoel stormed to victory, stopping the clock in 32:19 to claim his second stage win in a row with what we think might be the best time trial performance in history.

1. The harder the effort, the harder the warm up

The club 10 is a staple in basically every single myWindsock user’s diet and, while this race was a little longer than 10 miles, it was a similar-ish duration. One thing we noticed from the images of the riders preparing is how hard they looked like they were going on the turbo.

Riders interviewed afterwards were talking about how hard they went on the climb, with one saying his plan was to do the first 10 minutes at over 550W.

The harder the race, the harder the warm up should be – especially in instances like this, with a fast start. Riders were doing around an hour in some cases, though the literature suggests this isn’t necessary. Some time in each energy system progressively with one or two 15s efforts at the end is probably all you need, but don’t be afraid to go very hard, pop a gel afterward to replenish your depleted glycogen stores.

2. Don’t pace it evenly

The hard climb at the start takes us nicely onto the fact you should not pace any time trial evenly unless it’s a dead straight line with no elevation, corners or speed changes – and even then you should ride hard at the start to accelerate yourself. In order to simulate Remco’s 32:19 on this course, we had to input some obscene numbers. The average power we estimated for him on this course is around 405W, though this is heavily weighted in the first half of the course.

If we take that same average power of 405W but just ride a flat pace over the course, with other conditions all exactly the same, the time predicted comes out as 34:15, just shy of two minutes slower!

3. Climb in the TT bars – even when going slowly

All of the top riders rode the climb hard, but stayed in the bars. There was no standing up and swinging the bike around underneath them.

4. Use myWindsock to prepare

A quick look on Strava after every stage will show you that a decent proportion of the World Tour peloton are using myWindsock. We also know that many of the teams are using it to prepare for time trials and road stages. If you want to be as the best – click here.

Every year, the heat becomes a bigger topic of the Tour de France than the year before. This year, it’s become such a problem that, friend of myWindsock, Victor Campenaerts has foregone his socks. France has always been pretty warm in July and heat has always been a problem at Le Tour, but it does feel like it’s starting to get dangerous with ever increasing temperature management protocols from participating teams.

The other factor worth bearing in mind is that France is a massive country, at least in European terms. Every Brit can recognise the vast climactic differences between Scotland and Cornwall – if you drove this distance from Calais, you wouldn’t even reach Toulouse. If the Tour spends more time in the south these days, it may appear as if it’s getting hotter than it is in ‘real terms’.

We need to investigate if France is getting hotter as well as if the route is getting hotter too. For this, we will require a very specific set of skills and a slightly odd need to investigate such issues. If only there was some kind of website that would allow us to investigate this sort of thing…

Is France actually getting hotter in July?

France’s capital city is Paris, which in Summer can get quite warm and seeing as large urban populations typically have slightly more robust historical record keeping, we will use this as our initial benchmark. The data we’re using for this graph is from the French government and you can investigate it yourself if you like.

Since 1960 we see a slight upward trend of the daily average temperature with clear signals of heatwaves. Daily highs above 25 degrees have become more common and this has been felt more clearly since 2010. The microclimate of one city’s temperature gauge is not indicative of a broader pattern but if you were to ask the question of “are riders more likely to be sprinting up the Champs Elysees while warm today or in the past?” the answer would be that today is likely to be hotter.

Is the route getting hotter?

The below weather map is from France on the 12th of July 2026 in the afternoon. You can clearly see that the temperatures are distributed quite unevenly but there’s a rather warm patch in the middle. Le Tour actually went straight through this purple patch today and they shortened the stage by 30km as a result of this. It may be the case that routes have to be written with the temperature in mind in the future.

If we were planning the Tour de France, obviously we’d think about the weather first, seeing as that’s all we ever think about at myWindsock. This year, riders have been particularly unlucky in that they’ve been racing during a “heatwave”. Meteorologists typically declare a heatwave when daily maximum temperatures exceed a location’s specific average threshold for three or more consecutive days. As the average temperatures are drifting upward, heatwaves themselves are also getting hotter.

Certain parts of France’s geography are predisposed to heat and organisers should think about avoiding sending the race there in July. The final stage is an evening lap of Paris, which isn’t usually too hot especially as the riders don’t actually race it particTularly hard until the final hour of the race.

What should organisers actually do?

France is gradually warming up, along with the rest of Europe. Heat waves are becoming more common and they’re obviously both more likely and more severe in July. It seems that the position in the calendar is part of the problem, during the pandemic of 2020, organisers had no problem moving the race – ostensibly for the safety of the public and riders. A Wikipedia dive would show you that Le Tour has always taken place in July but there’s no obvious reason as to why that is.

It seems to me the organisers have two choices, one is to move the race to September or May while the other option is to stick to the edges, north and mountains of France and ditch the heat basin in the middle if they’re going to insist on the race continuing to take place in July.

The best way to plan the Tour de France would be with a myWindsock subscription. That way organisers could check historical temperature records along the route of each stage to make sure they’re not putting riders in danger.

Stage 1 of the Tour de France this year is a 19.6km lap of Barcelona. The weird thing about this year’s tour is that riders get their own individual time on GC, rather than the entire team getting the same time as the 3rd or 4th rider across the line. This opens up a conundrum for teams of where they burn their riders. It’s likely we will see a number of pacing strategies throughout the stage, with some teams keeping more riders for longer and others having riders peel off early.

Some useful information

If you’re travelling up a 7.5% gradient, this study modelled the impact of drafting at various speeds.

Our recommended strategy for using riders

As the rules have recently changed, teams will most likely employ a wide variety of strategies during Stage 1. The forecasted wind being low added to the fact that central Barcelona is sheltered from the wind with tall buildings means the majority of our attention will go to the elevation profile rather than wind. The climbs themselves are draggy so the riders will ascend them extremely fast and drafting will play a large role on these climbs. Overall average speeds on this course will be high.

We know a team starts with eight riders and they’ll want two or three for the final climb (depending on who their GC guy is and their physiology), the second to last climb will take two to three riders doing a final full gas 45 second turn each.

A best starting point for a pacing strategy as a result of this is all eight riders sharing the work for the first 15km with two guys pulling double turns and doing a final turn each into the bottom of the penultimate climb.

That leaves 6 riders into the bottom of the second to last climb. This climb is the shallower and longer of the two and will probably be ridden between 90 seconds and 2 minutes. Using two riders there leaves you with four into the final climb.

Alternatively, for teams like UAE and Visma with proportionally stronger GC riders, they might want to use more riders pulling shorter, harder turns on that second to last climb to allow their GC rider to do a harder final effort.

A not so well kept secret is most of the teams are using myWindsock to plan their pacing strategies, you can too here.

This weekend marks the 2026 RTTC National 50 mile championships. Riders will tackle a 3 lap course near Congleton in the North West of England. View the J4/34 course forecast.

Set just two weekends ago, the course records on the new J4/34 course are 1:47:29 and and 2:11:58 for men and women respectively – though after Sunday’s national championship we suspect both of these records will fall.

The wind sheer plot shows that the course is mostly protected from the wind. The dark sections of the overlay show where wind is reduced due to surface friction (caused by hedges, hills and more). The lighter sections are more exposed so the relative wind speed is higher – though forecasted speeds for Sunday are relatively low in general.

The terrain

Although we’re expecting some fast times, the course is not flat. Each lap descends into, and climbs out of, the River Dane valley twice. Most of the climbing and descending is on moderate gradients, so it should still be a day for the big chainring. However, a significant portion of the route is above 2%, and with a maximum gradient of 6.1%, some riders may find themselves wishing they had more than a single chainring.

We can see from the elevation profile that the course rolls gently. For some riders, depending on your personal preferences and physiology, this kind of course can be an advantage as it allows recruitment of different muscles as the gradient gently changes. Riding a long, hilly, time trial is an art form – and we have a specific guide on this here.

The weather and the wind

The weather has been in the news a lot this week, it’s hot up and down the country! Sunday’s forecast is much milder than this week. Riders shouldn’t have to make heat adjustments to their pacing plan for the race. The broad forecast summary is for moderate temperatures with a chance of showers.

The wind adjusted elevation tells the story of the day – wind is forecast to be mild 3.5m/s (7.5mph) and the course is relatively sheltered. The wind will add roughly an extra 35m of elevation each lap to the ride feel.

In terms of the course obstacles, there’s a couple of roundabouts to negotiate so early riders may see a traffic advantage before the Sunday shoppers head out at 10am.

All in all, it should be a good day for some faster than expected times with moderate temperatures and extremely still conditions. That paired with a pretty decent road surface and a successful test event, Congleton CC – myWindsock is looking forward to welcoming you to the race! See you all on Sunday.

Do you want to prepare like a pro? Sign up to myWindsock here.

Have you ever Googled “How to ride my bike faster”? If you have, this one’s for you. If you were to raise your FTP by 10 Watts it might take you between 8 and 12 weeks depending on your level of experience and the quality of your training – but you can get 10 Watts faster overnight by paying more attention to your aerodynamics!

This blog is not one that’s about to tell you to simply spend £300 on uber chainwax or £1500 on a new front wheel but how you can train yourself to ride faster, not harder. This is our top 3 sessions on how to get faster at cycling, without getting fitter.

Top 3 sessions to ride faster, not harder

Session 1, the v:P maximiser

The aim of this session is to ride as fast as possible for as low an average power as you can. The goal is to maximise the ratio of v (velocity) to P (power). If you’re feeling extra fancy, you can “normalise” your score on this session by using the wImpact. In order to execute this session you take the following three steps…

1. Pick a route with as few interruptions as you can reasonably find. In order to compare sessions and show improvement, you’ll need to repeat the session on the same route.
   
2. Ride the route as fast as you possibly can, while going at a fixed average power (or choose an average speed target and try and ride as easily as possible).
   
3. Analyse your ride in myWindsock, divide the ratio of your speed to power by the wImpact score and rank your rides. Hopefully you’ll see yourself improving over time.

You can improve your speed by playing around with where you use your power, holding experimental aerodynanmic positions while you ride or try out new kit!

Session 2, the Threshold Barber Chair

Maybe it’s just me, but I find getting a haircut extremely awkward as I’m forced to stare at myself in a mirror for half an hour. That’s why I called this session the threshold barber chair – as it requires doing threshold efforts with a mirror. The aim here is to prevent lazy position slipping throughout your TT.

1. Plan to do your threshold session on the turbo and set up a mirror in front of the turbo.
   
2. Do your intervals in the aero position (or holding an aero tuck if you’re on a road bike).
   
3. Aim to keep yourself as small as possible throughout the efforts, using the mirror as a guide.

If you’re feeling extra committed, you can do this session indoors with your TT helmet on to optimise helmet and back interaction – but please keep in mind this could boil your head.

The yoga matt

This session isn’t really a session, more of a reminder. You’ll be able to hold your aero position more easily if you’re stronger. The main thing to do is, when you’re riding around in your most aerodynamic position – pay careful attention to what fatigues, aches and hurts. These are the areas you can focus on in the gym. It could be anything from hamstring flexibility to tricep strength and what to focus on will depend on your body and your position.

Getting faster and getting stronger are not the same thing. You measure your strength with your power meter but the most effective (and probably the most cost efficient) way to measure your ability to go fast is with a myWindsock subscription.