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Bike Sizing.(10 posts)

Bike Sizing.Sub
Jan 1, 2002 5:25 PM
I am looking to buy a bike for my wife and am trying to figure out frame size. I may be able to buy a trek 2300 that is in showroom condition that is a 54 cm. She is 5 foot 6.5 inches and has a 30 cm inseam. I'm thinking this bike may fit her but may be a little big also. I would appriciate any help. Thanks

re: Bike Sizing.MarkP
Jan 1, 2002 6:01 PM
I think the 54 is a little big, but it might work if her body is flexible and you go with a shorter stem. I am 5'9", have a 31.5 inseam, and ride a 54. For bike fit formulas, go to, or
re: Bike Sizing.jtolleson
Jan 1, 2002 6:13 PM
I've owned a 54 cm Specialized, and I'm that height. Honestly, it isn't out of the question, but don't buy just because the price is right, especially if you are looking for her to log a lot of miles. Right now I'm on a bike that feels a touch too large, and I ain't happy.

Is her inseam properly measured? Obviously, that will help you resolve standover, but the bigger issue for women is going to be that top-tube length (shorter torso, proportionately).

If she isn't comfortable in the drops and the hoods, and if the shop can't give really good fit advice (including recommending and handling any needed stem swap) then I say skip it.
re: Bike Sizing.C-40
Jan 1, 2002 7:35 PM
If you have measured inseam properly, to firm crotch contact in bare feet, your wife could hardly standover this frame without intimate contact with the top tube. Trek states the standover height to be 30.3 inches.

For some reason the 52cm isn't much shorter, with a 29.7 inch standover.

The top tube length is not excessive, but a woman might require a shorter than average stem due to shorter arms. Her leg proportioning (which affects the saddle position) will determine the optimum seat tube angle. There are just too many variables to accurately predict the fit. Best to get a professional fitting before buying.
re: Bike Sizing.Chen2
Jan 1, 2002 7:56 PM
It sounds a bit too big. It's worth the extra time and effort to get the wife a good comfortable fit, even if you wind up spending more money. Always best to keep peace in the family, especially when it comes to biking.
Sounds good to meBernie
Jan 1, 2002 8:42 PM
You know that saying "to many cooks spoils the broth". Well I think that to many opinions on a post can just leave one not knowing what to do. Have your wife stand over the bike and pick it up. If she's got at least a good inch, you'll be fine. Those who are riding down sized frames with a lot of seat post and stem, are lagging behind the times. That look went out of fashion a long time ago.
Sounds good to mesounds ignorant to me
Jan 2, 2002 1:46 AM
You better tell Festina, ONCE, Laurent Jalabert, Lance Armstrong, Cofidis, David Millar, Bartoli, Garzelli, Escartin that they are out of fashion.

It's not just the seat tube it is the top tube length to take into consideration. There is alot of information on sizing because it is a complex issue.

Telling someone to stand over the frame is about as ignorant as saying showing alot of seatpost and stem are out of fashion. If the bike fits, how is anyone to control how much seatpost is showing?
Would you buy it for yourself..John-d
Jan 2, 2002 5:53 AM
just because it was cheap.

There are women specific bikes available now with the correct top tube, handlebars with smaller width and levers. Also the frames come in better sizes with adequate stand over.

What is outdated is women having to ride mens bikes with a compromised fit and riding position. Let her be correctly fitted for a womens bike, you would like the best wouldn't you.
re: Bike Sizing.Sub
Jan 2, 2002 9:50 AM
Thanks for the replies everyone. The bike is for sale from a private party, and unfortunately there are no bike shops in my area that I would trust to do a fitting. The good thing is that I can borrow the bike and let her ride it, probably the best place to start. I am not set on this bike just wanted some feed back on size. I ride a 56 cm and am 5 foot 9.5 and the bike fits great, I probably got lucky. Thanks

re: Bike Sizing.tyrius
Jan 3, 2002 8:42 AM
I think everything depends upon the body proportions. I am about the same size as your wife, just an inch taller, with the same inseam. I feel most comfortable on a 54cm Trek, although I don't have a lot of clearance on the standover. I found that my torso is longer so on a 52cm I am too scrunched up in the drops. The only true way to know is to ride it.

PS if the bike is still for sale I may be interested in it :)