Elvis Posted October 22, 2009 Share Can anybody tell me about the gear ratios on a junior cassette. My son is 11 years old. Link to comment Share on other sites More sharing options...
oldie Posted October 29, 2009 Share Big Front chainring must be a 52 tooth or smaller - nothing bigger. The rear cassettes smallest sprocket must be an 18 tooth. In other words when you have the chain on the biggest front chain ring and smallest sprocket at the back, roll the bike backwards making one full revolutuion of the crank. Measure from the start to end point.This must be no longer than 6.227m. This reffered to as the roll in for under 12 gearing. hope this helps you Link to comment Share on other sites More sharing options...
wheelz Posted October 29, 2009 Share U12 : 52-18U16 : 52-16U18 : 52-14 I think this is what it is. its been some time since i had these restrictions. Link to comment Share on other sites More sharing options...
scotty Posted October 29, 2009 Share If you looking Solomons in Woodmead have some junior shimano cassettes. Link to comment Share on other sites More sharing options...
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