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Frame size and fitting question?(11 posts)

Frame size and fitting question?hank1970
Aug 8, 2003 10:25 AM
I am looking to buy a new frame. My frame size should really be a 52. However, the frame I want is discontinued and there is only a 49 left. Can't I make up the difference by adjusting the seatpost and stem to make the frame work for me? Clearly, this is not the ideal situation, however, since this frame in no longer available will my system work?

Is this a terrible idea?

Comments please.
You'll probably be OK...Dave Hickey
Aug 8, 2003 10:44 AM
You can make up difference in a flipped/longer stem and a longer seatpost. Just make sure you really want this frame. I normally ride a 51cm and bought a 49cm on closeout. I made it fit but I never really got over riding a smaller frame. I kept telling myself " this would be a great bike if only it was a 51"....
re: Frame size and fitting question?03Vortex
Aug 8, 2003 10:48 AM
Personally. I wouldn't do it. Fit is too important. I'm sure you either have or can decide on another choice
Way too hard to say...jtolleson
Aug 8, 2003 11:13 AM
but certainly could be a bad idea. You say that your frame size "should be" a 52. Based on what? Not all 52s are the same.

Do you mean 52 cm measured c-c? Then if the 49 is measured c-t, it could be almost like a 47, a full two inches smaller than your preferred size. How long is the top tube? Is this a tiny frame where you'll put 700 cc wheels on it and have toe overlap? Getting you the right size might avoid that.

What is the seat tube angle? If it is fairly slack (like a 49 cm LOOK or something), once you move the saddle where you want and get a reduced effective TT, will you need a 13 cm stem or something?

We'd need to know a lot more than cm to be able to know if these bikes are close to the same.
Way too hard to say...hank1970
Aug 8, 2003 12:04 PM
The frame I am looking at, in the 52 version has a 52cm seat tube and a 53cm top tube. The same frame, which is only available in the 49 version, has a 49cm seat tube and a 51.5 cm top tube.

Idealy, I need a 51.5cm seat tube and a 53.5 top tube, based on my measurements.

Does this help you?

Thanks for your reply.
Way too hard to say...03Vortex
Aug 8, 2003 12:37 PM
Frames, by mfg, can be measured c-t or c-c. Trek measures by c-top of seat tube confusing things even more. The half cm difference on the seat tube in negligible in my opinion with a 2cm difference on the TT. The TT differeence is obviously the bigger issue.
What company?jtolleson
Aug 8, 2003 3:15 PM
You say you need a 51.5cm seat tube -- measured how? And a 53.5 top tube, but based on what seat tube angle? Probably about 74 but who really knows?

If it were me, I would probably pass, but even then it would depend on whether this were my big $$ main ride or backup bike. My retro lugged bike is probably slightly short in the TT, but I got it for $300 and love it anyway. I would not, however, have accepted the same dimensions in a $2000 bike that I spend 4,000 miles a year on.
don't do it....C-40
Aug 9, 2003 4:09 AM
The top tube is 2cm shorter than what you believe to be the proper length. Forget it and keep looking.

If you post a price range, maybe you can get some suggestions.
something that gets left out in these discussions: wheelbasegtx
Aug 8, 2003 12:48 PM
I ride a 57 c-c. Sure I could get a 54 to fit me with a longer seatpost and a 13 or 14 cm stem, but chances are that sucker is gonna be squirelly for me on fast descents.
I wouldn't do it.No_sprint
Aug 8, 2003 1:03 PM
There are so many bikes and deals available out there.
Relax and take some time to evaluateB2
Aug 8, 2003 5:26 PM
You don't REALLY have to have this frame now do you? I think we've all been there before... You get your heart set on something and then they throw a little twist at you like we don't have any more 52's, but we do have some 49's. Take your time and don't jump into something you may regret later. Take a long hard look at what you ideally need and what this frame can provide. If the differences are truly MINOR, go for it.

I'm with No_Sprint - there are a lot of really good deals out there. With a little patience, you'll find a killer deal somewhere. The key thing is you can't have a "I must have it now" attitude. Don't let your emotions over ride your common sense.

Best of Luck in your search,