Junior Gearing Question
07-03-10, 06:53 PM
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Junior Gearing Question
Hi,
Does anyone know if I will be able to pass rollout at a Juniors race using a 53 t crankset and a 15 T cassette ring?
Thanks,
Arden
Does anyone know if I will be able to pass rollout at a Juniors race using a 53 t crankset and a 15 T cassette ring?
Thanks,
Arden
07-03-10, 07:31 PM
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07-03-10, 07:37 PM
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He is correct. This is why:
Go here www.sheldonbrown.com
Go to Gears and drivetrain, then to gear calculator.
Put in all the info, including a 53 front chainring and a 15 tooth cog and choose gear inches. Then it will give you the number 92.9. Take this and multiply it by Pi, or 3.14 . Then divide it by twelve. Your configuration will give you 24.3 feet rollout. It needs to be under 26.
You might be able to get by with a 14. It would give 99.5 gear inches. Then, 99.5 x 3.14 = 312.43 . . . . 312.43/12=26.035
Now, I mean... You might be able to work that.
Go here www.sheldonbrown.com
Go to Gears and drivetrain, then to gear calculator.
Put in all the info, including a 53 front chainring and a 15 tooth cog and choose gear inches. Then it will give you the number 92.9. Take this and multiply it by Pi, or 3.14 . Then divide it by twelve. Your configuration will give you 24.3 feet rollout. It needs to be under 26.
You might be able to get by with a 14. It would give 99.5 gear inches. Then, 99.5 x 3.14 = 312.43 . . . . 312.43/12=26.035
Now, I mean... You might be able to work that.
