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Old 03-03-09, 07:10 AM   #1
rumrunn6
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MTB vs Road bike & leg stroke length

Do MTB's have shorter cranks; meaning you have a shorter leg stroke?
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Old 03-03-09, 07:16 AM   #2
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no, they're usually the same or longer
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Old 03-03-09, 08:27 AM   #3
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Road bikes are typically 165 to 175mm. With 170 on most of them. MTBs are typically 175-180, with 175 on most. There are plenty of exceptions, of course, but I hardly ever see them.

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Old 03-03-09, 08:59 AM   #4
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OK thanks. I took my first long ride of the year and after nursing my wounds I started to wonder about this.
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Old 03-04-09, 05:19 PM   #5
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Where the difference is coming in is the MTB bottom bracket is much higher then a road bike to allow clearance over obstacles.

The other difference is MTB are usually sized a couple inches lower then a Road bike. This is for stand over height. A MTB used as a Mountain bike you spend a lot of time standing to go over obstacles and climb hills. Where this is significant is the seat height is deliberately low to allow this.

If you were trying to do some big road miles on a MTB and your knees are hurting...there is your answer...seat too low. My Hybridized Rigid MTB looks ridiculously tall compared to me road bike. Fact is the seat to crank height is almost Identical since both are used on the road. It is the BB height being higher on the MTB.
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Old 03-04-09, 06:04 PM   #6
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I have the correct seat adjustment. I was not sore in the knees. Well the left one. The frame is at least 2" too small but the seat to pedal is fine
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