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new guy fit question(6 posts)

new guy fit questionjpeezer
Feb 19, 2003 10:28 AM
hey folks, I'm somewhat of a lurker here but now have been called into action. I'm looking at getting a new frame that fits me better than my current one. Here's the stats

Height: 5'6"
Inseam: 77cm
Sternum notch: 141cm
Arm lenght: 57cm
Weight (Arghh): 190

Here's the deal, my current bike has a seat tube of 52cm ctc and a top tube of 54 ctc. According to wrench science (that's where I got the measurement formulation) this bike with a stem of 90mm which I have should be ideal. Unfortunately it is very uncomfortable for me to use the hoods (although the bar is o.k.). I feel like I'm way too stretched out (I have looked at one or the short and shallow bars as well but I feel that would be a bandaid for a poor fitting frame). It seems as though the wrench science formula is a little too aggressive for me. I ride mostly rolling hills averaging about 30 miles a ride with hopes of starting to do longer rides ie 70 -100 maybe more miles.

My specific question is this: I'm looking at buying a used colnago frame in size 50 to shorten the top tube by roughly 2cm. I would also play with stem length to get a perfect fit. I realize that I might need a stack of spacer but I'm ok with that to get a shorter reach. what do you guys think about going with this frame? Any helpwould be appreciated, especially from you famous fit guys (ie c-40).
SuggestionsKeeponTrekkin
Feb 19, 2003 11:39 AM
A 2 cm shorter TT will reduce reach by something like 1+ cm as the seat will be raised by 2cm more and will go back because the seat tube is angled backwards. Thus, you're not getting much of what you want with the smaller frame.

It sounds more to me like the bars are too low. Higher bars are closer too (same reason).

You could experiment with stems with more "up" angle. It would be easier to reach the drops too.

Alternatively, consider a frame of different geometry like:
http://www.rivendellbicycles.com/html/bikes_rambouilletframes.html

Their design and product philosophy might be just right for you.

See the review at:
http://www.roadbikerider.com/pr3.htm#Rivendell%20Rambouillet

The reviewer and his partner publish a weekly newsletter and maintain this site. They're straight shooters and know their bikes.

KoT
I'm the same size. Went with a 51and a 9 stem...Quack
Feb 19, 2003 11:50 AM
51cm Dream Plus, 9cm Magic stem.
I can measure up the bike I have setup if you would like and post the measurements later tonight.

Larry
Raise dat stem!Fredrico
Feb 19, 2003 12:22 PM
jpeezer, they's right. Get those bars to about 2" below the height of the top of the saddle, even higher. Then less of your weight is on the bars, more on the seat, and you can stretch your back more and be comfortable.

How much seatpost does your bike have now? If its more than 6", the frame is probably too small: you can't get the bars high enough to be comfortable with saddle height. This seems to suggest a smaller frame would fit worse rather than better.
thanks fellasjpeezer
Feb 19, 2003 3:27 PM
I appreciate the answersso far. I have my stem raised as far as the limit will allow (threaded)and just installed a salsa short and shallow bar (lbs had it for $15.00) i figured I couldn't go wrong. Please continue to post your ideas.
wrench science...MrDan
Feb 19, 2003 6:22 PM
See what happens to their fit reccomendation if you
adjust the flexibility parameter down a notch or two...