i heard once that shimano has a chain that allows the user to shift gears while pedaling under full power. is this true? what parts do i need in order to accomplish this?
2007-02-02 08:08:15 · 5 answers · asked by Anonymous in Sports ➔ Cycling
i heard there was a certain chain like the Interglide or hyperglide or something like that....
2007-02-02 12:45:30 · update #1
i don't know about a chain, but there used to be a rear derailer (I think Shimano) in the late 90's (maybe still available) for mountain bikes that pulled the gear down instead of dropping it down in default/spring retraction mode...opposite from the way you pull the rear gear up with a conventional derailer, you pulled it down, and it naturally retracted upward (towards the granny gear)
...as far as I know, it's not the chain....many shimano chains are "hyperglide"
2007-02-02 16:16:59 · answer #1 · answered by (_)iiiiD 4 · 0⤊ 1⤋
Yes & No.
Remember that the tension is all on the top of the chain when you are pedaling hard.
You should always be able to change gears using the rear derailleur under full power because the rear derailleur has no pressure on it. It can easily move the chain side to side.
The front derailleur cannot shift under load because it is trying to move the chain where all the tension exists. You have to let up on the pressure a bit in order to shift in the front.
So....going into a hill, anticipate what gear you're going to need to be in for the front gear and switch that before you start pedaling hard. Then downshift in the rear as your speed slows to make sure you can continue to pedal.
2007-02-02 20:40:14 · answer #2 · answered by Andrew W 3 · 0⤊ 1⤋
I am not aware of any components that can survive such rough treatment. Based on own experiences, "full power" shifts are not good for the drive-train and make shifting harder. I have actually broken some components by trying to do "full power" shifts. In a tough situation, I try to let up somewhat before shifting and do the gear change as quick as possible.
2007-02-02 21:11:26 · answer #3 · answered by davj61 5 · 0⤊ 0⤋
I doubt there is any brand that let's you shift while you're doing full power using the standard deraileurs. There might be something using internal gearing that might let you do that, but I'm not sure. Shimano has the Nexus hub, which has the internal gear shifting, so maybe that's what you're looking for. But I don't think that's intended for offroad use, nor it will be particulary light either.
2007-02-02 17:44:10 · answer #4 · answered by Roberto 7 · 0⤊ 0⤋
Nope. Bicycles are not meant to shift under power, and that's just their nature. If you can't learn how to shift appropriately, then swallow the fact that you'll be buying new chains often.
2007-02-03 12:17:27 · answer #5 · answered by Anonymous · 0⤊ 1⤋