Trek Fuel EXe (All Models) Tuning Solutions

PLANET3 is a planetary gear set which reduces the rotation speed of the magnet used by the wheel speed sensor three times. For every three full rotations of the rear wheel, the magnet completes just one full rotation - effectively making the bike think it's doing 1/3 the speed it is actually doing, thus increasing the pedal assist speed limit by a factor of 3. For the e-bike models sold on EU/UK market this translates into a speed limit increase from 25 to 75 km/h (15.5 to 47 mph), while the US and Canada models limit is raised from 20 to 60 mph.

For the Trek Fuel EXe a dual planet configuration is mandatory to avoid errors during low speed pedaling. Dual planet configuration brings the ratio of the PLANET3 down to 1,5:1 (halves it) making your speed limit 1,5 times higher than stock (~38 km/h for the EU/UK and 30 mph for US spec e-bikes) but bringing the rear wheel rotation speed closer to the "realistic" range which the motor expects because of the firmware protections implemented in the TQ motor.

WARNING:

Some users have reported their bike's sensor isn't detecting the PLANET3 - the issue was that the sensor was to far from the PLANET3. But there is a simple solution for that, just pull the sensor towards the axle, put some sticky tape to it so that it isn't loose when you secure it with the existing flange and you're good to go. Please refer to the video and photo examples in the gallery.