I bought a trek Marlin 5 with 29 inch wheels. I was wondering if I could switch the 29ers with 27.5 inch wheels. I would prefer the 27.5 inch wheels for some 20-30 foot jumps I've been hitting. Would I be able to switch the wheel sizes without ruining the bikes functionality?

  • The Trek you are talking about is an entry level cross country bike, most likely not intended for 30 feet jumps structurally and component-wise. I would advise to excersice caution and maybe get something more suitable for jumps. Commented Apr 23, 2016 at 16:09
  • What bike would you suggest for jumping 20-30 feet?
    – a.d.s.
    Commented Apr 24, 2016 at 6:10

1 Answer 1


If you have disc brakes, all you need to do is find a new set of compatible disc wheels (i.e. the rotor will mount to the front hub, and the rear hub has the right rotor mount and freehub compatible with the number of speeds you want), and you can swap to a different wheel size.

Obviously, your tires need to clear the frame still, and the bike will handle a bit differently.

  • Do you think that the smaller wheels are better for jumping?
    – a.d.s.
    Commented Apr 23, 2016 at 1:20

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