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Standover height on road bikes... How important is it ?(4 posts)

Standover height on road bikes... How important is it ?moose3
Apr 30, 2001 8:25 AM
I have a 52cm and a 54cm road bike, both have the same toptube and stem length. On either case I have no standover height on both bikes. Thew LBS suggested that my proper fit is a 50cm bike. However, measuring the 50cm I've tried the top tube lenght and stem is the same as my current bike. I am 5'7 with a 30 inch inseam... with cycling shoes and cleats I am on the top tube bar but not sitting on it. So my question is how important is the standover height ?
It think top tube is more importantDave Hickey
Apr 30, 2001 10:03 AM
Moose3, I'm your size. 5'7" with a 30" inseam. All my bikes are 50cm but I've selected them based on top tube measurement. They all have top tubes between 52.5cm and 53.5cm. As long as you don't have too much discomfort standing at a stop light, I really don't see a problem.
One more commentDave Hickey
Apr 30, 2001 1:17 PM
A 52cm or 54cm frame might also give you a more comfortable stem height to seat height ratio. One thing I found with a 50cm bike is I need a tall stem to be comfortable. You might be better off with a 54cm bike.
I'm your height....dave
Apr 30, 2001 4:04 PM
but I have a 32-5/8" inseam, so I ride a 55cm, and still have over 3cm of standover clearance.

Be sure that your 30 inch inseam is accurate. If your crotch just brushes the top tube, it won't hurt anything. What you really want to know is if you have any room before you get to hard (saddle like)contact with the top tube. If you can place a 3/4" thick board under each wheel, and it isn't so high that it makes you lift your heels when you straddle the top tube, its OK, IMO.

On my 55cm, I can put a 1-1/2" thick board under each wheel, and get hard contact with the top tube in bare feet. I measure from the floor to top of the top tube to get an accurate inseam measurement.

The other problem I see is the short top tube. If you're 5'-7" tall, you have a longer torso than me, and should require a longer top tube. I require a 54.5cm t-t with a 74 degree s-t, or up to a 55.5cm t-t with a 73 degree s-t. I usually use a 110mm stem. If you get a bike with a 53cm t-t, I would think you'd need a 130 stem.