Apr 5, 2002 12:33 PM
|How important is standover heigt on a road bike? I amm looking to buy a new road bike after mountain biking for the last 15 years. I have strange proportions with short legs and long torso. My inseam is 28.5 inches barefoot. I was told I should look for a road bike with a 54cm top tube. My problem is finding a bike with these proportions. When I measured my old Austro-Daimler road bike I found the standover was 30" and the top tube was 55cm. My question is should I be concerned about buying a new road bike with very little standover clearance?
|re: Standover Height||Troyboy|
Apr 5, 2002 1:13 PM
|Once you've bounced around on that top tube for a bit and nearly lost the ability to father or mother, you'll realize how important it is. Before I smartened up I rode many setups with virutally no standover height. Took my thick head a long time to realize that my fit was not near optimum and could be greatly improved. My inseam is over 30 and I'm comfortable with top tubes in the range of 53 to 54.7. Good luck.|
|re: Standover Height||MP|
Apr 5, 2002 1:13 PM
|The important thing is top tube length. However, you need to be able to stand over the bike when you come to a stop so you don't fall over. One old standby rule is to have about an inch of clearance between the top tube and your crotch while standing over it. You might look for a compact frame design which will automatically take care of your standover problem. You can go to www.coloradocyclist.com or www.wrenchscience.com or other well known sites for proper bike fit.|
Apr 5, 2002 1:26 PM
|I like their formulas. Both my MTB and Road I think fit really well, I went to Wrenchscience after the fact, plugged in my numbers and I'll be damned if it's recommendations where almost dead on both my setups. One note, the formulas are different for MTB and Road so make sure you choose the proper bike type to get the proper calculation on the 2nd page. I would recommend plugging in your numbers for the mountain bike, compare it to your actual mountain bike setup (assumes an XC setup). If it's really close, then that's a probably a positive indication that their road formula is probably going to work for you as well. At the very least, a good place to start in your search for a road frame.|
|re: Only matters if you have to get off the bike quickly - nm||dzrider|
Apr 5, 2002 1:18 PM
|re: Standover Height||jtolleson|
Apr 5, 2002 2:12 PM
|Compact geometry may suit you... a longer effective TT length for a very shortened (obviously) seat tube.
Otherwise, based on what you've listed you may have to look custom. That is a very short cycling inseam (are you sure you measured accurately... from floor to FIRMLY in crotch while flatfooted).
|Double check your fit||Kerry|
Apr 5, 2002 2:50 PM
|With these calculators:
For adjusting the fit of the bike, there are roughly five starting points:
1. Seat height (top of saddle to center of pedal axle) at 108-110% of inseam.
2. Saddle parallel to ground.
3. Saddle fore/aft adjusted so that a plumb bob from the bony protrusion just below the kneecap passes through the pedal axle when the cranks are horizontal. This is known as KOPS (Knee Over Pedal Spindle)
4. Front hub axle obscured by the handlebars when riding in your "regular" position (drops, hoods, or tops).
5. Top of handlebars 1 to 4.5+ inches below the top of the saddle depending on your flexibility and size.
These are all starting points for "average" proportioned people, and many folks like to move away from these starting points as they learn what makes them more comfortable, powerful, or efficient. You want to get the fit of the frame as close as you can, then do minor adjustments with the stem, seat post, saddle position, etc. The odds are good that you could go with a little shorter top tube and a little longer stem without any problem. If you really can't stand over the bike without having the cockpit way to short, then you're a candidate for custom.
|Giant bikes ?||PeterRider|
Apr 5, 2002 4:44 PM
|What about Giant bikes ? Their strange geometry could fit you... and they are not expensive ! |