Are you like most people that really don’t like all the hassles and problems associated with a front derailleur? Now you have an alternative.
Efneo’s GTRO 3-speed front gearbox is perfect for trekking, hybrid, urban, single speed, city and folding bikes as well as for off road non-competition bikes and e-bikes.
Gear ratioGTRO’s 1st gear is a neutral gear (1:1). Second and third gears are incremental. GTRO’s standard chainring is 28T.
|Gear||Ratio||Teeth equivalent for 28T|
|1st||1:1||28T (phisical chainring size)|
|2st||1:1,43||40T (phisical chainring size)|
|3st||1:1,79||50T (phisical chainring size)|