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-   -   Curious about a handling phenom... (https://www.bikeforums.net/singlespeed-fixed-gear/491672-curious-about-handling-phenom.html)

betaZenji 12-03-08 08:42 PM

Curious about a handling phenom...
 
So the other week my buddy and I were doing a little TT of which part of it is on the paths. On the return end we had a tailwind and where slightly slower than our goal so my friend takes a pull and starts hammering. There are some dips on the mups and I noticed that as we were dropping into the dip our real wheels where lifting and slightly drifting to left (I noticed it on my bike then watched him to check if he was doing it as well, and he was.)

Fast forward a week or two and we are on another run through the streets tripping speed traps (very fun workout!) and we get caught in a traffic "situation". So I speed up, take the pull and we turn left. At this point I roll over a manhole and the back end lifts a bit again, and again it drifts slightly to the left.

So I wonder if this is the result of the pedal force on the crank? or bad form? Do you find that you slow or weaken your stroke if the possibility of a rear wheel lift is present? I just noticed this so I was curious.

cyrano138 12-03-08 09:01 PM

Could be the orthogonal force generated by rotation. It's the same thing that keeps a gyroscope standing up when it's spinning. Rotation of an object generates a force parallel to the axis of rotation, in the positive direction relative to counterclockwise motion, so it would make sense that they drifted to the left when you were going forward. Somebody correct me if I'm wrong.

betaZenji 12-03-08 09:24 PM

That's what I was figuring, but didn't quiet know the words lol Strange thing is I never had this happen on my geared rides. Oh well...

lattanzio 12-03-08 10:08 PM


Originally Posted by betaZenji (Post 7960119)
There are some dips on the mups and I noticed that as we were dropping into the dip our real wheels where lifting and slightly drifting to left

i can't even fathom what your synthetic wheels were doing!!!! jk, though wtf were most of those words?


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