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Old 10-01-04, 02:18 AM   #1
mswantak
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Homemade grip shifters?

I'd like to change over from my friction-type bar shifters to twist-grips. I was thinking I could persuade a couple of motorcycle throttle grips to do the job, but before I root through the local cycle salvage I thought I'd see if anyone has already undertaken a similar project, or if friction-type shifter grips are available.
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Old 10-01-04, 06:15 AM   #2
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SRAM still makes them in their low end Gripshift lineup.
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Old 10-01-04, 07:27 AM   #3
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I just checked out their website, and I didn't see anything that stated it was compatible with older non-indexed derailleurs. Which model were you referring to?
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Old 10-01-04, 07:58 AM   #4
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Quote:
Originally Posted by mswantak
I just checked out their website, and I didn't see anything that stated it was compatible with older non-indexed derailleurs. Which model were you referring to?
I duno what you are trying to do, but index shifters are generally not compatible with pre index or non index type derailers. A friction twist shifter, if that is what you are referencing,would be compatible with index or non index RDs.
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Old 10-01-04, 11:48 PM   #5
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That's exactly what I'm after -- a friction twist shifter. I'd been thinking I could modify a motorcycle throttle into one, but if they're available somewhere, that'd be the path of least resistance.
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Old 10-02-04, 01:45 PM   #6
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In Some of the replacement gripshift sets - only the right one is indexed. Maybe you could use another left one as your rear derailleur shifter. Just a thought.
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Old 10-02-04, 02:27 PM   #7
seely
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Hm yeah I forgot the rears are always indexed. Front is easy, I think the MRX or something like that has the friction front.
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Old 10-02-04, 06:18 PM   #8
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Motorcycle throttle grips wouldnt work, because the bicycle derailler cable travel is too small - you would be overshifting all the time.
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Old 10-03-04, 12:26 AM   #9
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Cable travel on motorcycle throttles is varied. I've had some bikes you'd swear you needed two handfuls to open up, and then there are racing throttles with only about 1/4 turn. The latter would be useable as a shifter. I saw an aftermarket throttle that uses bevel gears, a la BMW 'R' series, to allow the cable to enter parallel to the bars. If the travel is acceptable, that'd be one answer at about $20 apiece.

The guy at the LBS also mentioned using front grip shifters on both sides.
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Old 10-03-04, 03:55 PM   #10
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I've seen friction type grip shifters on low end department store bikes made by Falcon. I don't know where you can get them other them finding a bike at a store and buying the bike to get them.
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