Bermuda Bicycle Association

Junior Gearing - Examples

Examples of  Acceptable Gearing Ratios

 

 

The following combinations of largest front chainring and smallest rear cog SHOULD enable your bike to pass the BBA's Junior Gearing Maximum Roll-out Test. Please note that you must take into account wheel size (examples for the two most popular sizes (650 and 700) are given.

 

Note also that tire dimensions and tire pressure can sometimes make enough of a difference to invalidate some of these combinations. The BBA rule specifically requires the bike to pass the Junior Gearing Maximum Roll-out Test described above, so always do the Roll-out Test after setting up the bike, just to make sure.

 

Juniors - Home

Summer camp

Junior gearing

Age groups & distances

Events

Schools program