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Shifting Under Power, screwed up.(5 posts)

Shifting Under Power, screwed up.niteschaos
Jul 27, 2002 10:01 PM
I have a full Tiagra Bike right now with the exception of the RD, which is 105. I want to be able to shift under conciderable power so i don't loose momentum. What is the next grade available in Shimano that will allow me to shift while out of the saddle and not throw me off the bike?
re: Shifting Under Power, screwed up.gs6769
Jul 28, 2002 4:53 AM
You may want to look at full 105. It works very well for me in all circumstances. That said, no matter what components you have it's best to let up at least for a fraction of a second when you shift under high load on the pedals. It doesn't have to be all that much, just enough to give the drivetrain a chance to do it's job without hammering the parts or like you said, throwing you off.
Beyond 105 you've got your Ultegra then Dura Ace. D.A. is prohibitively expensive for most people and really only makes sense for use with high end frames. Ultegra is somewhat cheaper and bit heavier though it offers excellent performance. Again though, I think it's wise to match component quality with frame quality.
Out of curiosity, what bike do you ride?
Frame of questionniteschaos
Jul 28, 2002 9:14 AM
I ride a Felt F75 7005 series Al frame. I think the frame is excellent and I have already recieved complements on it. I excel on the climbs, once I've found the right gear. It's just that the climb usually goes from steep to Gaa-Gaa around a sharp turn and I find myself having to cut power to shift and I lose a good bit of momentum. My favorite training ground is Paris Mountain State Park in Greenville, SC, and it is a 10% average grade for 1.5 miles.
It's technique, not the parts.Mr Good
Jul 28, 2002 6:03 PM
You need to ease off the pedals for just an instant (while your momentum keeps you going) to allow the shift to happen. Notice I didn't say stop pedaling, but just ease off the pedal stroke for a fraction of a second for a smooth shift. You can do this with any shifter/cog/dr. But no parts will give you a perfect smooth shift when you're standing up and cranking on the pedals!
It's technique, not the parts.pkompath
Jul 29, 2002 4:39 AM
No shifting occured.