How much faster does a skinsuit make you? (video)

We tested how much faster a skinsuit could make you compared to a standard bib shorts and jersey combination
Playlist 20 Videos How much faster does a skinsuit make you? (video) 02:59 Watch: The most anticipated cycling tech for 2020 03:13 Watch: Are these the most influential cycling products of the last 10 years? 07:16 Watch: inside the Hope factory where GB's new track bike is being made 10:07 July's tech of the month: new products from Garmin, 100%, Prime and Cannondale 19:54 Pro bike: Geraint Thomas's Pinarello Dogma F12 04:35 June’s tech of the month: New Brompton X, Cannondale SystemSix and Maxxis tyres 20:54 April's Tech of the Month: Canyon Aeroad with SRAM AXS, new Vittoria tyres and Fulcrum wheels 26:29 March's Tech of the Month: Pinarello, new Specialized shoes, DT Swiss wheels and Evoc's bike bag 27:06 February's Tech of the Month: new kit from Castelli, Le Col, Smith and Triban 24:22 Greg Van Avermaet to ride a gold Giant TCR in 2019 (video) 01:00 Watch: Top five Strava cheats (video) 04:41 January's Tech of the Month: Colnago C64, Assos Equipe RS S9, Santini Vega and Specialized S-Works Recon 18:29 December's Tech of the Month: New Shimano 105, Canyon's best bike and new helmet tech from Specialized and Met 22:31 The best new e-bikes of 2019 05:01 November's Tech of the Month: New S-Phyre shoes, a CatEye lightshow, Fulcrum carbon wheels and a big bike bag 24:26 October's Tech of the Month: New Giro helmet, rain protection from Castelli and Specialized's tubeless tyres 19:24 Watch: Seven of the hottest aero bikes for 2019 06:15 The six most exciting cycling computer releases of 2018 03:09 September's Tech of the Month: Fighter jet cycling glasses, Wahoo's indoor training system and a pair of very sensible lights 17:37

When riding on a flat course the only real factor on a rider’s speed is the drag caused by wind resistance. It is commonly accepted that the bike accounts for 20% of the overall drag, and your body the remaining 80%.

Therefore, there are lots of products and changes you can make before you decide to spend thousands on a new aero road bike or time trial bike. One such upgrade is a skinsuit.

>> Struggling to get to the shops? Try 5 issues of Cycling Weekly magazine for just £5 delivered to your door <<

>>> Best skinsuits for cycling: aero tested

Quintana in Endura clothing

Quintana wearing an Endura skinsuit with panelled arms (Photo: Watson)

>>> There have been many recent innovations with skinsuits

If you are new to road racing or time trialling it is likely you have been just wearing a pair of bib shorts and a cycling jersey. The question is how much faster could wearing a skinsuit make you?

Cavendish wins worlds 2011 by Watson

Mark Cavendish won the 2011 Worlds wearing a skinsuit (Photo: Watson)


To record how much faster a skinsuit was compared to a bib shorts/jersey combo we used a CDA (Coefficient of Drag Area) system. The CDA is calculated by tracking a rider’s power output and speed, along with the air density, lean angle, rolling resistance and the rider’s position on the track.

The lower the CDA the more aerodynamic the position; you’d expect a position on a time trial bike to have a lower CDA than that on a road bike.

>>> How much difference can pinning on your number correctly make?

The same rider undertook four test rides each of six 250m laps.  The rider rode both the road bike and the time trial bike wearing standard bib shorts and jersey followed by a wearing a skinsuit. For the avoidance of doubt, the same helmet and shoes etc were used on all test runs.


skinsuit vs bib shorts

As you’d expect the skinsuit was faster than the bib shorts and jersey set up. On both the road bike and time trial bike the skinsuit had a saving of around five watts, which over a 25-mile time trial ridden at 25 mph equates to 21 seconds and 28 seconds respectively.

>>> See how much faster a time trial helmet is compared to a road helmet. 

We were slightly surprised by the results and had expected greater wattage savings. For example, if an average rider wore their normal jersey you would expect a wattage difference of between 10-15 watts compared to a skinsuit. The reason for the reduced wattage saving in our testing was due to the the jersey being a particularly good fit.

In conclusion, the results clearly show that a skinsuit is faster. However, how much faster is dependent on the quality of both the skinsuit and the fit of the jersey.