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Frame size for tall and big guy?(10 posts)

Frame size for tall and big guy?helton
Oct 7, 2002 5:47 AM
I am 6'5" 300lbs. and currently ride a 22" cannondale mount bike. Want a cross bike but uncertain about frame size. Was measured for a road bike and was told I needed a 66cm road frame with a 61 cm top tube. How does this correlate to a cross frame? The 2 bike shop's close to me are good people, but are clueless about sizing a bike..Any help would be appreciated.
go to big&tall dept.....marcmarc
Oct 7, 2002 6:59 AM
i suggest trying www.wrenchscience.com they have a bike fitting section that you can start with since you lbs may need help too. Conventional thought is for a cross frame that is a size smaller than your road size. you have to be the judge however on how it works or fits you. i like a shorter stem than my measurements indicate.

marc
Look for the top tube lengthB123
Oct 7, 2002 10:44 AM
Generally cross bikes are sized by the top tube length. I run a 59cm top tube, my bikes have seat tubes that range from 61 to 64cm long. I like to have the same length for both road and cross. The top tube length, or effective length, is probably the most important measurement on a bike, along with seat to handlebar drop. Empella makes a large bike, along with Cannondale, Fuji and Colnago. A custom builder would also make an excellent choice for you, matching tubes and materials to your size and weight. I have a longer head tube spec'd on my road frame because of my neck problems. Generally custom frames, without fancy paint jobs, run at or below retail prices for mass produced frames.

I have an aluminum Rex, www.rexcycles.com, with painted fork and stem. I think his prices are very reasonable. I know he mixes tubesets for each customers riding style.
Look for the top tube lengthatpjunkie
Oct 7, 2002 12:29 PM
I'm 6'4" and run 59 cm TT's as well. If you are 6'5" and need a 65 cm roadie you must have hella long legs 36"+ inseam. This means you may need a shorther 58 cm TT.Try to find a cx bike in the lo 60's. The Specialized cx in a 60 should actually do you well, you'll have a little extra standover and the TT length should be about perfect. Custom is a great call and at your weight I'd say probably aluminum as you may flex steel a little too much, unless it's custom.
What is your inseam?Mitch2
Oct 7, 2002 4:45 PM
66! That is huge! I have a 36 inch inseam and I ride a 60 cross bike w/ a 60 tt.
What is your inseam?helton
Oct 8, 2002 3:35 AM
Measured with barefeet, it is 37.5 inches. Steve.
Try getting a 61 or 62...Mitch2
Oct 8, 2002 6:27 AM
Based on Colorado Bike fit formula this is roughly the size of bike you need. The 61 is a C to C while the 62 is a C to Top. You can try out bikes from this given size range. As a reference my inseam is a 36 and my Rock Lobster cross is a 60 center to top of top tube and the TT is a 58 w/ a 120 stem.( I'm all legs)

Good Dirt
Try getting a 61 or 62...atpjunkie
Oct 8, 2002 12:35 PM
he sounds all legs as well. Might need to go custom as a frame that size will have a really long TT which won't fit his body. That's why I suggested the 60 S Works. He'll have more than enough standover and an appropriate TT, otherwise look into Italian Frames as they are notorious for short TT's.
And stronger tubes....Mitch2
Oct 9, 2002 6:06 AM
I made a mistake in getting light weight Dedaccai tubing and it flex like crazy when I stomp on the pedals or when I do hard turns on pavement. Next time I will get a more hefty steel tubing or maybe go back to aluminum(Yikes).
And stronger tubes....atpjunkie
Oct 9, 2002 9:25 AM
am a Clydesdale using race grade Aluminum (Specialized M4 and whatever Ridley used in 2000) and have found it suprisingly compliant for a rider my size. Have an 853 steel road frame and don't flex it that much.