The Efneo GTRO Gearbox is a 3 Speed Internally Geared Crankset
Replacement. It will give you an effective gear range identical to
having a 28/40/50 Triple Crankset up front, without having to use a
front derailleur. You can shift the Efneo whether you are moving or
standing still! The Efneo GTRO Gearbox comes in 3 different
configurations- Twist Shifter, Trigger Shifter, or Bar End Shifter. For
more information visit www.efneo.com
Gear ratio GTRO’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 (physical chainring size) |
| 2nd |
1:1,43 |
40T (physical chainring size) |
| 3rd |
1:1,79 |
50T (physical chainring size) |