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Allowed gearing on a Junior (young person) road bicycle?

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Allowed gearing on a Junior (young person) road bicycle?

Old 11-15-15, 04:41 AM
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Allowed gearing on a Junior (young person) road bicycle?

My understanding is that in order to avoid damage to growing young people that for young Junior road racers there's a limit to how high a gear that they can be use. Can someone tell me what that gear limit is?

Thanks and cheers.
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Old 11-15-15, 01:27 PM
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Look at the rules on the USA Cycling website. Or British Cycling, if you happen to be a Brit.

As you'll see, it varies with age. Under 12, 48x17. Under 14, 48x16. Under 16, 48x15.
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Old 02-11-16, 06:08 PM
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I put a 45t chainring on my son's bike. 45x12 with a 23mm tire is right under the limit, and it's much easier and cheaper to find a 12-25 or 12-27 cassette than a "junior specific" 14-25.
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Old 02-12-16, 06:07 PM
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Originally Posted by caloso
I put a 45t chainring on my son's bike. 45x12 with a 23mm tire is right under the limit, and it's much easier and cheaper to find a 12-25 or 12-27 cassette than a "junior specific" 14-25.
Somehow I thought you were a junior - or a recent one.
2016 (not 2015) the Shimano Ultegra 14-something (cheap) or a RECON alloy (<$200) are the way to go with a standard 52T front ring and offer future options. Chain tension matters and much over U14 a 45 is a minor issue - at least for males.
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Old 02-12-16, 06:23 PM
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Originally Posted by Doge
Somehow I thought you were a junior - or a recent one.
2016 (not 2015) the Shimano Ultegra 14-something (cheap) or a RECON alloy (<$200) are the way to go with a standard 52T front ring and offer future options. Chain tension matters and much over U14 a 45 is a minor issue - at least for males.
Hah. I'm 49.

The other reason for me going with the 45x12 gearing is that it would allow me to share wheels with him. I hadn't thought about the chain tension issue, but it's not much of an issue yet. He's 85lbs and not putting a huge amount of force on that chain just yet.
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Old 02-12-16, 06:27 PM
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Originally Posted by caloso
Hah. I'm 49.

The other reason for me going with the 45x12 gearing is that it would allow me to share wheels with him. I hadn't thought about the chain tension issue, but it's not much of an issue yet. He's 85lbs and not putting a huge amount of force on that chain just yet.
You are right. When mine was <80 I found lighter wheels for him - kinda. But I'm a wheel guy 1st, bike frame and everything else 2nd.
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