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MTBR going roadie help plz(8 posts)

MTBR going roadie help plzgboz
Oct 7, 2001 5:46 AM
I am a mtbr, but im turning roadie. I need some help though, on fit. I ride a 19.5 ( large) cannondale. What would the cm equilivent bike be? im also 5,9 if that helps
I would apprecate any help i could get. I am in the miltary, and i am in korea for a year, so i have to mail order a bike, and i just have no clue what would be equilivent, i know that my bike is a some what big for me, but i like its feel and i would like to stick with it, but i dont know it this same size would be good for road either.
re: MTBR going roadie help plznestorl
Oct 7, 2001 5:59 AM

There are too many things you have to consider and the advise you will get here will be limited. BUT: AT least: measure you inseam (correctly), then determine your appropriate seat tube lenght BUT pay close attention to the stand over clearance of the bike. DO NOT buy a bike if you do not know the STAND OVER clearance. Make sure it is at least 4cm below your inseam. Top tube is less of a concern for someone you size than for a shorter person. Good luck Nestor
re: MTBR going roadie help plzThorman
Oct 7, 2001 8:19 AM
Here's a good site to use as a guide for determining your correct frame size.

I also ride mountain bikes and did so for a number of years before getting into road riding last year. Fit isn't such an important factor when you're riding for an hour or two on a mountain bike. It really makes a difference though when on a road bike for 2-6 hours. Spend the time to determine your proper size and be sure to evaluate each manufacture's sizes before buying a bike. Not all companies size their bikes the same.
re: MTBR going roadie help plzdsc
Oct 7, 2001 8:33 AM
I agree with the advice above. I'm also a relatively new roadie, 5' 10" and female (so my reach is a bit different) but fit is SOOO important. My MTB is a 17" frame, for lots of standover clearance on uneven terrain. I tried several different road frames at 57 cm that seemed to fit well, but ultimately went with a 55 cm frame when I bought my Zurich, due to the slack seat angles and extended reach on (all) Lemond bikes. So take ALL of your measurements into consideration, and do your homework on each bike manufacturer that you are considering.

Good luck!
threadless stem stack is important tooJohnG
Oct 7, 2001 9:51 AM

One thing that isn't generally mentioned in the fitting charts/systems is the issue of stem spacer stack (with threadless stems). Make sure you take estimated stem stack into consideration.... I.e. frames with 'execessive' standover clearance (>3cm) can often cause problems with saddle/bar drop that may only be fixable with lots of steerer tube spacers or funky uptilted stems. IMHO, neither of these 'solutions' is correct. For this reason, I often recommend frames with standover (with shoes on) clearance < 2cm.

Note: Some frame builders (Litspeed, and almost all small botique builder) are offering extended steerer tubes on their new frames to help with this exact issue.

Final note: Take your time with your sizing research because as the other posters have noted, 'fit' is VERY critical on a road bike.

Multiply by 2.54...vanzutas
Oct 7, 2001 5:18 PM
When going from inches to cm just multiply the number of inches by 2.54, that makes your C'dale 49.53 cm. however a road bike should normally be bigger than an equally well fitting mountain bike. road bikes require less standover because you will encounter less obstacles that cause you to step off.

Multiply by 2.54...dsc
Oct 8, 2001 11:17 AM
A 5' 9" man used to riding a 19" mountain frame cannot ride a 49 cm road frame; the frame sizes just don't translate that way. 55 - 57 cm is my guess, but as I mentioned earlier, take ALL of your measurements into account, and research each manufacturer that you're considering.
re: MTBR going roadie help plzBlue 'Goose
Oct 8, 2001 12:48 PM
Speaking as a mountain biker turned roadie/mountain biker
and who has a road bike that is manifestly too large for
me, do this:

Seek out a competent fitting at a local dealer before you
head out (if you haven't already).

I think many of my problems would be solved by having the
right sized bike.

Anyway, also seek out different bikes to try out.
Try a steel road bike, then try an aluminum road bike.

See what you like best - don't just try one bike.