Manual setup
Pick chainring, sprocket, and tire size to calculate rollout.
Front chainring teeth count.
Rear sprocket teeth count.
Select the measured tire width in millimeters.
Rollout summary
Chainring size
50T
Sprocket size
11T
Tire size
28mm
Rollout summary
9.68m
Category
Based on British and European Cycling rollout limits.
CategoryRollout (m)
UK Youth A (7.18m)7.18
UK Youth B (6.73m)6.73
UK Youth C (6.34m)6.34
UK Youth D (unrestricted)Unrestricted
UK Youth E (unrestricted)Unrestricted
Assen Cat 1 & 2 (5.50m)5.5
Assen Cat 3 & 4 (5.90m)5.9
Assen Cat 5 & 6 (6.30m)6.3
Assen Cat 7 (6.70m)6.7
Assen Cat U17 (7.68m)7.68
Belgium U9, U10, U11 (5.52m)5.52
Belgium U12, U13 (5.76m)5.76
Belgium U14, U15 (6.48m)6.48
Belgium U17 (7.68m)7.68
Belgium Junior (10.16m)10.16
Belgium UCI Junior (unrestricted)Unrestricted
France FFC U7-U9-U11 (5.60m)5.6
France FFC U13 (6.40m)6.4
France FFC U15 Homme (7.01m)7.01
France FFC U17 Homme (7.62m)7.62
France FFC U19 (unrestricted)Unrestricted
Germany BDR U11 (5.70m)5.7
Germany BDR U13 (5.70m)5.7
Germany BDR U15 (6.20m)6.2
Germany BDR U17 (7.70m)7.7
Germany BDR U19 (unrestricted)Unrestricted

Disclaimer

Please read before using the calculator.

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