This pageBioRacer Time Trial and Triathlon Fit
A trainSharp BioRacer Aero Fit is our most advanced fitting service for time-triallists and triathletes who want free...
£299
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BioRacer TT and triathlon fit
TT and triathlon bike fitting with BioRacer aero testing
In a time trial or triathlon, your body creates most of the aerodynamic drag, so your position is the biggest speed gain available. But an aero position is only fast if you can hold it, pedal powerfully in it and, for triathletes, run well afterwards.
Our BioRacer TT and triathlon fit uses BioRacer Motion aero runs to measure the effect of each change, so we find a position that is genuinely faster for you, not just lower.
- Time
- About 2 hours
- Price
- £299
- Includes
- Written report
Cytech-trained mechanicsBioRacer bike fittingTrusted for 20+ years
What is a TT and triathlon bike fit?
A time trial or triathlon fit sets up your bike for one goal: covering a distance as fast as possible on your own. That means a low, narrow, aerodynamic position, but one that still lets you produce power, breathe freely and stay comfortable for 10, 25 or 100 miles.
The challenge is that the most aerodynamic position on paper is rarely the fastest in a race. If you can't hold it, you'll sit up, lose power or end up in pain. For triathletes, the bike leg also has to leave your legs and back ready to run.
We combine a full position fit with BioRacer Motion aero runs, which estimate the drag of each position. That lets us compare options with data rather than guesswork, and choose the best balance of speed, power and comfort for your events.
Who this fit is for
- Time triallistsfrom club 10s to championship events
- Triathletessprint to Ironman distance
- Riders new to a TT bikewho want to start in the right position
- Riders with a new aero bikeor new aero bars
- Anyone stuck on a plateaulooking for free speed
- Riders who can't hold their positionfor the whole event
What happens in your aero fit
Goals and events
We talk through your events, distances, current position and any discomfort, plus any UCI or triathlon rules you race under.
Position fit
We set saddle, cleats, pad stack, reach and width so you can produce power in a stable, sustainable aero tuck.
BioRacer aero runs
BioRacer Motion aero runs estimate drag for each position, so we can compare changes with data.
Helmet and kit testing
We test helmets, skinsuits and cockpit options to see what saves the most time for you.
Time savings
We estimate the time each change saves over your race distances, so you know what's worth doing.
Written report
You leave with a full written report, your measurements and a clear plan for any changes.
What's included in your aero fit
- About 2 hours with an experienced aero fitter
- Full TT or triathlon position fit
- BioRacer Motion aero runs to estimate drag
- Helmet, kit and cockpit testing
- Estimated time savings over your distances
- Full written report and measurements
Aero is free speed, if you can hold it
Small changes to head position, arm width and pad height can save more time than an expensive set of wheels. But they only work if they suit your body. That's why we always start with comfort and power, then use the aero runs to choose between positions you can actually sustain.
Many riders also race on a road bike with clip-on bars. If that's you, we can set up that position too. And if your next step is buying a TT or tri bike, our frame and size fit helps you pick a frame that will reach your ideal position.
What to bring
Your TT or tri bike, shoes, skinsuit or race kit, helmets you'd like to compare, and your race calendar. If you have power meter data, bring that too.
Book your aero fit, or compare our other fits
Pay online to secure your session. We'll be in touch to agree a date before your next event.
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Frequently asked questions
How long does a TT and triathlon fit take?
About two hours, including the position fit, the BioRacer aero runs, helmet and kit testing and your report.
What are BioRacer Motion aero runs?
They use BioRacer's motion analysis to estimate the aerodynamic drag of your position. We use them to compare different positions and equipment, so decisions are based on data rather than how a position looks.
Can you fit a road bike with clip-on aero bars?
Yes. Many riders race on a road bike with clip-ons, and we'll find the best aero position that bike allows.
Will my position be legal for racing?
Tell us which rules you race under, such as UCI, British Cycling, Cycling Time Trials or triathlon rules, and we'll keep your setup within them.
When should I book before a race?
Ideally at least four to six weeks before your key event, so you have time to train in the new position and use your free follow-up if needed.
Find free speed before your next race
Book your BioRacer TT and triathlon fit online, or ask us about your event first.