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Old 06-01-06, 12:56 PM   #1
pvfjr
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MTB fit vs Road fit?

I've got a 16.5" FS bike that seems to fit me fine for what I use it for at a height of 5'6". I was noticing though, it seems as though people tend to get bigger bikes for the road. Why would this be? I'm seeing a lot of people around my height riding 19" when it comes to roadies. Is there something I'm missing out on here? Would it be the same for a hybrid commuter?

The reason I ask is because I might be checking out an old rockhopper today for real cheap. It sounds like it's gonna probably be a 19" frame. I have an old 16.5" hard rock I was gonna turn into a hybrid commuter, but I was wondering if I should pick up this rockhopper instead and build it. The hardrock feels a bit small too, even though it's the same size as my trail bike. Maybe the bars are just too low. He thinks it's about 15 years old, but sounds like it should be in good shape. I already have a set of XT V-brakes on the way that I was gonna put on the hardrock, but I could just as easily put them on the rockhopper. I'm also not really liking the color of the hardrock, and think the rockhopper would be a bit more favorable. Anything against a rockhopper this old? Would 19" be a little small?
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Old 06-01-06, 01:52 PM   #2
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Measure the effective top tube length (horizontal from bars or height you will run the bars to middle of seat post). Compare to effective top tube of FS (front or full sus?). If you are thinking of running drop bars, the top tube would need to be shorter.
Road bikes (non-compact frames) often have shorter top tubes for a given seat tube (nominal frame size that you are listing). Then ride it.
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Old 06-01-06, 02:13 PM   #3
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Old 06-02-06, 12:07 AM   #4
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Sweet link, exactly what I've been looking for. Seems like this mountain bike has a perfect road fit for me, what better for a hybrid? I went ahead and picked it up, seemed like a good deal. Even came with a computer. All I gotta do is swap out a tube, then it's rideable. Then I'll see about upgrades.
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Old 06-02-06, 05:55 PM   #5
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I stand 5'8"/173cm tall and wear trousers with a 30"/76cm inseam. My 55cm traditional road frames fit me perfectly. My 19"/48cm mountain bike would be too tall for me for serious offroad technicals, but it works fine onroad and on dirt roads or tame trails.
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