White Industries Double/Double group is a drivetrain solution for single speed riders that like to ride on the road to the trail head, and then get serious off road. The gearing is such that it allows suitable road gearing, and then by manually moving the chain, the rider converts the gearing to a suitable off-road gear ratio.
The overall number of teeth from the ring to freewheel is the same whether in the outer gear or inner gear position. The advantage of this configuration is that the chain length required remains the same in both ratios.
The group comes with ENO cranks, 16/19t freewheel, and chainring. Rings for the Double/Double are actually two gears machined into one ring. For gearing most suitable for 26" wheel bikes, we recommend the 38/35 ring. For gearing most suitable for 29" bikes we recommend the 34/31 rings.
Rings are made out of 6061 aluminum and available in silver or black. Use with a 3/32" chain. Made in the USA