Youth Gearing & Junior Rollout Calculator

Check your youth gearing against the official gear restrictions: enter your tyre size and racing category to see every legal rollout — a free gear calculator for junior and youth cycling.

Select your setup

Choose tire size and racing category to calculate legal rollouts.
Select the measured tire width in millimeters.
Based on British and European Cycling rollout limits.
Gear combinations summary
Target rollout
7.18m
Tire size
28mm
Wheel standard
700c (622.0mm)
FrontRearRollout(m)Diff(m)
37117.16-0.02
47147.15-0.03
40127.10-0.08
50157.10-0.08
53167.06-0.12
43137.05-0.13
33107.03-0.15
46147.00-0.18
36116.97-0.21
49156.96-0.22
39126.92-0.26
52166.92-0.26
42136.88-0.30
45146.85-0.33
32106.82-0.36

Guides

Disclaimer

Please read before using the calculator.

The information on this site is provided for general guidance only. While we aim to keep it accurate and up to date, we cannot guarantee completeness or correctness. Use of the information is at your own risk.

We may link to external websites for convenience. We do not control or endorse their content and are not responsible for any loss or damage arising from their use. We also do not guarantee uninterrupted availability of this site.

Questions? Contact us at chiefdruid@cyclingteam.co.uk.