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Interesting. I'm not married to the idea of 11 gears in back specifically, but rather to the benefits I mentioned up-thread over what I currently have. As GradeA pointed out, 10 might work too and has it's own benefits. I'm learning so I appreciate these ideas. I thought I would have to go to...

Re: Re: Thanks, GradeA. This is very helpful.

Re: Re: I just measured the rear spacing. It is 126mm. I found a web page (http://bikes.aberrance.com/stumpjumper/ ... jumper.htm) about a 1982 Stumpjumper which has 126mm spacing so that lines up. How much will the rear spacing need to be increased? Is it feasible?

Re: Re: Indeed it is a lovely bike, but in the last 30 years we've made improvements to how we do things. They don't sell 3x5's with friction shifters anymore for good reason. The 1x setup has no redundant gears, index shifting, no possibility of cross chaining, is simpler to operate with a...

I have a 1984 Stumpjumper Sport which I'd like to convert to 1x11. I am a bike maintenance neophyte and I'm trying to get my arms around what is involved. The bike currently has the stock 3x5 setup: 46/36/26t in front and 13-30t out back. This setup gives me a high gear ratio of 46/13=3.54 and...

Your bike is beautiful. Would you mind describing the various components? I've just bought an '84 SJ Sport and your bike providing a lot of inspiration.