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Fitting Your Bike Are you confused about how you should fit a bike to your particular body dimensions? Have you been reading, found the terms Merxx or French Fit, and don’t know what you need? Every style of riding is different- in how you fit the bike to you, and the sizing of the bike itself. It’s more than just measuring your height, reach and inseam. With the help of Bike Fitting, you’ll be able to find the right fit for your frame size, style of riding, and your particular dimensions. Here ya’ go…..the location for everything fit related.

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Old 06-04-14, 08:37 PM   #1
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How important is frame size for beginners?

Hi everyone,

All bike frame size guides I read suggest I get at least a 20'' frame size.

However, I found a 18'' MTB bike that is well recommended and is on sale at the store. It's a rather cheap bike and is only sold here in Brazil.

Should I spend more and get a 21'' bike or go with this 18''?

My measurements:

Height: 187cm / 6' 1''- 6' 2''
Weight: 93kg / 205lb
Inner leg (inseam): 91cm / 35.82''
Arm length: 68cm / 26.77''
Top of sternum to floor: 156cm / 61.41''

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Old 06-04-14, 08:59 PM   #2
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Short answer is frame size is always important, just not as super-critical for us casual riders. Get the better bike, that is more comfortable when you test ride it. Rough estimate is maybe 1 to 2 inches between your jewels and the top tube. Then also make sure that your torso is at a comfortable angle and you are not leaning on the bars. My guess would be 21 inch.
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Old 06-04-14, 09:27 PM   #3
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I'll disagree, especially mountain bikes. I can have a blast on a 17" mountain bike, and I'm 6ft. Smaller MTB bikes are very cool and easy to handle technically. Forget about top bar clearance, that's nonsense.

Ride it, and if you can climb with leverage without your knees being cramped by the distance to the bars - you're good.
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Old 06-05-14, 12:10 AM   #4
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I can ride a 52cm frame with the right stem and seatpost or I can ride a 60cm frame. Others might disagree but I don't find frame size critical as long as its within the range you can modify it to fit. 2 inches smaller on an mtb can be a good thing. You want a smaller frame for riding downhill.
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Old 06-05-14, 01:15 AM   #5
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I am more comfortable on a 20" wheeled BMX than my old "fitted" 26" MTB.
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