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  1. Trek
    Hello. I have a Trek Powerfly 7 with just replaced cassette and chain. Now I have the following issue: When the motor is turned off, there is no slip on the small cog, but as soon as I turn the motor assistance on (in any of the assistance levels) and I make hard pressure on the pedals, the...
  2. Drivetrain
    Just over 2 months ago I changed the transmission of my MTB. with a Shimano CS-5100-11 (11-51t) sprocket and a Radius MT-09 hub Everything perfect until after a few rides on the ground, a lot of effort, a lot of heat, dust, etc. I noticed that I had a little slack between the cassette in the...
  3. Drivetrain
    hey all, i just got an old trek 3700 frame (probably 7 spd originally) and I want to upgrade the gearing without adding one of those stupid megarange shimano cogs. Can you put 8, 9, or 10 speed cassetes on a frame intended for 7 speed use? OR... have i just revealed that i know close to zip...
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