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My behind touch the saddle while climbing(7 posts)

My behind touch the saddle while climbingNoam
Apr 23, 2002 9:21 PM
Out of the saddle and climbing I often touch the tip of the saddle with my behinds. Occasionally it grabs my shorts. What could be the reason(s) and how to avoid it. Ridding Position/short stem/slide back saddle?

Noam
Downunder
It's normaljtolleson
Apr 24, 2002 6:32 AM
Assuming you are just talking about the ocassional tap-tap-tap against buttocks or thigh. You want to essentially keep that weight over your pedals, so leaning forward to get away from the saddle will effect dynamics other ways.

Your saddle position should be set for seating riding (Ok, I'm stating the obviously). For many folks, that is the traditional "knee over pedal spindle" or a cm one direction or the other. It shouldn't be influenced by out of saddle preferences.

Your stem length likewise is best determined by evaluating your seated setup. Whether you are using a short hand "bars obscure the front hub" standard or a more complex standard based on arm and torso measurements plus flexibility, it should still be based on seated bike fit.

Go to a shop and get a little fit help if you've got questions about your set up. But it may not change the contact you are having with the saddle when you stand.
Keith Bontrager believes that the climbing position and thebill
Apr 24, 2002 12:47 PM
center of gravity of the rider in relation to the BB has everything to do with the saddle fore-aft and the bar position (stem length). Or, I guess, actually vice versa -- that you are supposed to get the equipment positioned correctly to balance on out of saddle efforts. He advocates a frame size and a position that allows adequate space in the cockpit for the rider to balance on out-of-saddle effort, neither pulling the bike over on top of him on a climb or banging knees on a sprint. Interesting. He argues that a recumbent shows the irrelevance of the knee position over the pedal spindle, and he doesn't seem much to care about the front wheel/rear wheel weight ratio.
Interestingjtolleson
Apr 25, 2002 11:20 AM
Wonder if the analysis changes with riding style. The average hobbyist (even serious rec rider, of which I consider myself one) spends statistically a pretty limited time out of the saddle. Meanwhile, placing saddle fore-aft or determining stem length for a reason that doesn't reflect a good seated fit seems crazy to me.

No matter what the setup, I think being tapped in the booty while climbing is pretty standard stuff, unless you've got a seatpost with huge setback.
Can't see it.muncher
Apr 26, 2002 6:20 AM
I have my saddle in a pretty normal position (about 1/2 along the adjustment rail, ordinary post) and on the way home I tried to get the saddle to touch. It doesn't - the only way I could get it to, was to "crouch" far lower than normal when climbing (kills the thighs too). In my normal climbing position, I am way above, and a little forward of, the saddle.

I thought I had a pretty normal riding style, but perhaps not?
He was just saying its ONE factorRay Sachs
Apr 26, 2002 9:54 AM
His analysis (The Myth of KOPS) doesn't say that the frame should be designed around the out-of-saddle riding position, but that for someone that spends a lot of time out of the saddle, this is one of the factors that needs to be factored in when designing the frame. IIRC, he talks a lot about the compromises in frame design and this is one of the key areas that leads to compromise. For a rider who's almost never out of the saddle, this is obviously much less of an issue and the frame can be better optimised for seated riding. Peter White talks about the same tradeoffs in a different way in his fit article on his web site.

-Ray
My behind touch the saddle nearly all the time (nm)cory
Apr 24, 2002 7:48 AM