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Modern tyre pressures & AEOX wheel data

22 May 2020
Looking for more information about setting up your AEOX® wheels? See below for all the tyre and aerodynamic information. 

Also please feel free to use our handy tyre calculator to check what tyre pressures you should be running with your AEOX® wheels, on standard tarmac roads. Please use the tyre pressures as a guide, you can lower pressures for wet conditions or very rough surfaces, or increase them for super smooth roads. Happy riding!

  • Enter your weight in kg including clothes and helmet.
  • Nominal tyre width is what is written on the sidewall (actual tyre width will be greater when installed on AEOX® wheels due to the 19.6mm internal rim width).
  • Recommended PSIs should be used front and rear for time trial/triathlon bikes, and for road bikes you can decrease 2-3psi for the front wheel.
  • Don't forget to press "Calculate"!
Calculate PSI
Rider weight:
Nominal tyre width:
Recommended PSI :

AEOX ZEPHYR


ZEPHYR wheels are 78mm deep and the most versatile aerodynamic deep section wheel on the market. Incredibly stable in the wind, they can be used with many different types of tyre without losing any aerodynamic performance. For example changing from a 23mm Vittoria Corsa Speed 2.0 tyre to a 25mm Corsa Speed 2.0 has almost no impact on overall speed (0.1w difference), unlike some competitor wheels which can have up to a 5w penalty with a width that is 2mm away from optimal!


- We recommend that time triallists use a 23mm Vittoria Corsa Speed 2.0 with a ZEPHYR wheel (or an AEOX® TITAN wheel).

- We recommend that short distance triathletes use a 25mm Vittoria Corsa Speed 2.0 tyre with a ZEPHYR wheel.

- We recommend that long distance triathletes and road racers use a 25mm Continental GP 5000 TL tyre with ZEPHYR wheels.


The graph shows how changing tyre will affect the overall performance of ZEPHYR wheels.

AEOX TITAN


TITAN wheels are super deep, super stable and are the fastest front wheels we've ever tested. Coupled with an AEOX® disc in the rear it is the ultimate in aerodynamic performance.


We designed the TITAN to work optimally with a 23mm Vittoria Corsa Speed 2.0 tyre - there is a 2.2w penalty from running a 25mm Corsa Speed, but the 23mm tyre (as printed on the sidewall) spreads out to around 25mm when installed on the 19.6mm internal rim bed.


- We recommend that time triallists and triathletes looking for no compromise speed use a 23mm Vittoria Corsa Speed 2.0 with an AEOX® TITAN wheel.


Please see the graph for aerodynamic data against a range of competitors, as well as the ZEPHYR front wheel.

AEOX Disc


The AEOX® disc wheel is the fastest disc we've tested. There is practically no aerodynamic impact from changing to a 23mm or 25mm tyre with an AEOX® disc. Please bear in mind that due to reduced clearance in the rear of the bike, you may be unable to fit a 25mm tyre depending on your bike model. Please check with your frame manufacturer as to the maximum tyre width permitted - 25mm nominal tyres will spread out to 26-27mm when installed on an AEOX® disc.


- We recommend that time triallists use a 23mm Vittoria Corsa Speed 2.0 with an AEOX® disc.

- We recommend that short distance triathletes use a 25mm Vittoria Corsa Speed 2.0 tyre with an AEOX® disc.

- We recommend that long distance triathletes and road racers use a 25mm Continental GP 5000 TL tyre with an AEOX® disc.

Continental Aero 111 wind tunnel & rolling resistance data

by PH587141 • 27 November 2024
The new Continental Aero 111 tyre is designed to provide maximal aerodynamic advantage by use of a custom tread pattern. However there is often a tradeoff between aerodynamics and rolling resistance (Crr) in terms of how tyres are shaped and how this affects Crr, and understanding how the two combine to provide the overall fastest system is essential when looking to improve performance on the bike.

Clincher tyre rolling resistance performance in track cycling

16 February 2024
This test explores the difference in rolling resistance between clincher and tubular track racing tyres. Vittoria, Veloflex, Dugast and Continental tyres are compared at different inflation pressures.
Dr Xavier Disley of AeroCoach & Chris Hall are performing a road bike fit at AeroCoach HQ

Understanding road bike fit aerodynamics - how to get more aero!

by PH587141 • 23 October 2023
Chris Hall came to visit us at AeroCoach HQ in order to improve his bike fit on his Cervélo road bike, specifically focusing on aerodynamics for road bike time trials. Holding different positions such as in the drops, the breakaway aero position and on the hoods we explored the impact on Chris' body position and how that would relate to his aerodynamic drag. Watch the video to improve your road bike fit for aerodynamics: Xavier and Chris discuss narrow handlebars, turned in levers, torso angle, aero helmets and more!

Tubular track tyre rolling resistance

22 May 2023
Ensuring you have the best equipment during high speed track cycling events is extremely important. This data set provides information on the best tubular track tires/tyres for rolling resistance/Crr.

UCI Time Trial position regulations for 2023 onwards

23 November 2022
In 2023 there are new regulations for UCI time trial positions, relating to extension reach and shifter height, based on rider height. AeroCoach offer a range of options for our Ascalon extensions to achieve all possible combinations for the three rider height categories. Please see our TT position video below for an overview of the changes, and scroll down for the Ascalon options. PlePlea

How to hold aerobar extensions

6 July 2022
Aerobar extensions, whether used on a triathlon/TT bike or using a clip on system on a road bike, come in a wide variety of sizes and shapes. AeroCoach has been testing riders since 2012 and we've noticed a few trends into how you can optimally hold your extensions for aerodynamics as well as comfort. Your body accounts for around 80% of the aerodynamic drag of the bike and rider system. Your optimal stack height, extension reach and elbow width for aerodynamics will be individual and can only be determined by conducting an aero test, but as well as these variables there are differences in how riders hold their hands on extensions, and in this test we explored some general guidelines which you can follow. Don't forget, a lower aerodynamic drag will result in less power required to travel at the same speed, or for the same power will cause an increase in riding speed, when not travelling up steep gradients.

Front light aerodynamics

23 December 2021
In the UK, having a front light when racing time trials is now obligatory under CTT regulations. Not only this, but also some events are conducted over long periods of time (eg. 24hrs, or multi day ultra endurance rides) and so with front lights being a necessity we explored the impact of front lights on racing aeroydnamics in the wind tunnel.

Clip on aerobars

29 October 2021
Using clip on aerobars on a road bike is a great way to improve your aeroydnamics. Your body accounts for around 80% of the aerodynamic drag of the bike and rider system. In this test we explore the impact of holding different positions on a standard drop handlebar, alongside an aerobar position using a set of Ascalon extensions. A lower aerodynamic drag will result in less power required to travel at the same speed, or for the same power will cause an increase in riding speed, when not travelling up steep gradients.
UCI legal and illegal banned road bike aero positions

UCI banned road bike position aerodynamics

18 April 2021
The UCI have banned and outlawed some aero positions, such as riding using your forearms as a point of contact. What is the impact of turning the lever hoods inwards or riding with an illegal position with the forearms on aerodynamic drag? What is faster?

Road tubeless liners and rolling resistance

25 November 2020
Road tubeless liners or inserts are used to provide extra security in the case of a tubeless blowout. In this test we explored their impact on the rolling resistance of a tubeless tyre.
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