Originally Posted by
RobbieTunes
7 to 8 is quite possible in road. I simply don't know about mtb. I doubt the dish is a big deal, and it can be redished.
My modifications are road bikes, and I've done it 2 ways:
1-Change a 7-sp freehub to an 8-sp freehub, redish and use a longer axle. I paid LBS $50 total for the change, including parts.
2-Swap out the rear wheel for a more modern one. This is by far the easiest. I generally pay $60-$125 for a wheelset, and sell the older set for $40-$75, sometimes up to $100.
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Option #2 is the way I have done it. The last time, I picked up a $5 donor 8 speed MTB, and just swapped wheels, and all other drive components (I needed them to build up a frame I had).
Good reliable 7 speed shifters are easy to find. I have used the Shimano Tourney ones sold by Niagara for $12 for several thrifty builds. They come complete with SIS housings and cables. Tough to beat!
http://www.niagaracycle.com/product_...ducts_id=15889