Road Cycling - Can you help me with selecting a right size bike?

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wonsup
04-08-01, 12:16 PM
Hi,

I am a speed skater who would like to cross train on road racing bikes.

I had a couple questions about slecting a right bike for my measurement.

I went to the bike store and the owner told me that I probabgly need 56 cm frame bike(just looking at me). He had one 56 cm frame bike and I standed on it and the top frame was pretty much touching my crouch. I thought there has to be like 2 inch clearance? The owner said it is the right size, but I am thinking since he has this model in stock he is telling me to pick that particular size?

I am 5' 11" tall, but I have relatively long torso. Should I go down to 54 cm frame? That would fit my legs right, I think, but then would my torso be too long to sit comfrotabely over the steering head? Is there a website that shows me how to pick and adjust right size bike? Any rule of thumb?

I weigh about 155 lb and my feet size is 10.5 inches, if that matters on what size to pick.

I am thinking about buying Raleigh R700. Is this a good bike(seems like a good value) and what price range should I look for on this model? Local store didn't carry Raleigh, is there a website that I can order from? I would pay a little more, if I can get at a local store, so I can receive more personalized recommendation and fitment.

thanks,
john

Hunter
04-08-01, 05:16 PM
Yes you do need clearance over the top tube, 2 inches is good. The thing is about a LBS is sometimes you get what you experienced. I am going to include some sites for you to look at about fit.
http://www.aboutbikes.com/abweb/bike%20fit.html
http://www.bontrager.com/rants/myth_of_kops.html
http://www.rei.com/EGA/clinics/bikefit2f.html
This should clear up any questions you may have. Hope this helps.
roadbuzz
04-09-01, 03:59 AM
And another:
http://www.coloradocyclist.com/bikefit/

MichaelW
04-09-01, 05:08 AM
Bikes are designed in different proportions. Some manufactures bikes are longer for a given frame size.

The micro-style frame, popular these days (eg Giant) uses a lowered top tube with more clearance, but retains the top tube length of a standard style frame.

You need about 1-2" clearance on a standard frame, but given that, then length (top tube+ stem) is the most important factor for fit.

The length you need depends on your size and your riding style. Riders who can get low for aerodynamic drag need a longer frame. The bike company Serotta have a fitting system which is a little less naive than some of the others. They also make great frames, but you dont need to buy one to use their system.