3

I got a whole Shimano Deore groupset 3 x 10 and would like to upgrade my good old Trek bike. Do I need to change the whole rear wheel now? It has currently Sunrace Megadrive Lock Ring Type cassette or rather a freewheel. And if I need a new wheel, what should I get so that it lasts?

3

You'll need to:

  1. Maybe respace the rear dropouts, depending on the age of the frame. Modern wheels are wider than older wheels. For reference, 7 speed road is 126 mm, 7 speed mountain is 130 mm, 10 speed road is 130 mm and 10 speed mountain is 135 mm. Note that your frame needs to be steel for respacing to work -- if it isn't steel, you risk frame failure.

  2. Get a new wheel -- something which has a Shimano-compatible 10/11 speed freehub (11 speed will also work with 10 speed). You could just buy the hub and rebuild your existing wheel with it, but you need a hub designed for the same number of spokes, likely all new spokes of the new correct lengths, and someone whose got experience doing it. Overall, in cost and reliability, getting a new wheel is probably a better bet.

  • I measured the frame and the spacing is 135 mm, which gives at least some hope that the frame will take it. – Maja Apr 2 '16 at 7:25
  • I'm not sure you measured correctly. What model Trek is it? – Batman Apr 2 '16 at 14:18
  • It is TREK 3700 purchased in 2007. I measured according to this instruction sheldonbrown.com/frame-spacing.html using a precision measuring tool. – Maja Apr 2 '16 at 20:33
  • Okay, that's a pretty new bike. I'd believe that has 135 mm spacing. So you just need to buy a new rear wheel. – Batman Apr 2 '16 at 21:09
  • I believe this kind of hub would work shimano.com/content/sac-bike/en/home/mtb1/wheels---hubs/… even though the bike has V-brakes, not disc brakes. – Maja Apr 2 '16 at 21:15

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.