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What offers a 'better' riding position?(6 posts)

What offers a 'better' riding position?buffalosorrow
Mar 2, 2002 7:11 PM
At the moment my set up includes a 120mm stem and a straight post. I am about 4 cm behind the b/b.

Could a shorter stem and a layback post offer a more efficient position?

Other notes I was tailing my friend, I was on my CX and he on a road bike, I had a hard time keeping up with him. We are riding together this comming week and I am going to swap my vittoria cross tires for some slicks. The rolling resistance seems to be high.

I have been always been able to hold my own in the past.
Perhaps this season he has an edge on me.
re: What offers a 'better' riding position?mackgoo
Mar 7, 2002 7:06 AM
As far as the fit goes that really is a personal thing, what works for one could be suicide for another. But what do you mean your 4cm behind the bottom bracket? As a start with the cranks at 3 and 9 o clock the knee of the one at three should be even with the spindle of your pedal. It probably couldn't hurt to be a little behind as I would think that most tend to power in cross not spin. Now if your 4cm behind the spindle that's almost 2 inch's that's alot, I might look to move my saddle forword and if need be lengthen the stem.
I have found that with the big fat low pressure tires coupled with a 48X13 top gear my average speeds on the road have dropped a few Mph.
What offers a 'better' riding position?buffalosorrow
Mar 7, 2002 9:02 AM
yes the '4 cm' measurement is from the center of the b/b to the nose/ tip of the saddle.
At the current set up I am using a straight seatpost and a 120mm stem. It really varies on how I feel, being either a bit streched out of just fine.
What offers a 'better' riding position?mackgoo
Mar 7, 2002 10:53 AM
Ok, just for the heck of it try this. Get on the bike so you can just sit there a trainer or some one holding you up works best. Get your right crank at 3 O Clock with your foot on the pedal take a string with a weight tied to one end and let it drop from the bony part of your knee under your knee cap. Where does the weight fall in relation to your pedal spindle?
What offers a 'better' riding position?buffalosorrow
Mar 8, 2002 6:55 PM
The pedal spindle is and inch or two ahead of my knee.

Some problems with my set up might cause this:
175mm crank arm length.
Even with the straight seatpost I am pushed back "too far"
What offers a 'better' riding position?mackgoo
Mar 8, 2002 7:48 PM
I've heard that crank length really doesn't affect the KOP that much as for a longer crank the seat would come down some efectively pulling the seat forward because of seat tube angle thus really negating everything.
Conventional wisdom would say you are way back but what really matters is how you feel as in comfort. Origonally one concern you had was your ability to keep up with the other rider, that could really be atributed to the tires particularly if you were running any kind of knobbies, as I say I'm down a few Mph and I'm just running the diamond tread. 28 mm though and 70 psi vs 22 mm and 150 psi. My top gear now is 48X13 vs 53X11 too.
Can you move your seat forward any?