Derailluer Recomendation for Hillclimb Bike

Discuss light weight issues concerning road bikes & parts.
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bobqzzi
Posts: 54
Joined: Mon Feb 04, 2013 10:04 pm

by bobqzzi

Hello. I am building a hillclimb bike and would like a pointer towards an appropriate rear derailler.
Requirements/conditions of use as follows:
Will take 34T cog
Only needs to accomodate a 11 tooth difference (I am using a single front ring and the 4 top cogs of an 11-34 cassette)
Friction shift, so no particular indexing required.
Price is an issue- I like to be on the sweet spot of the grams/$ scale, not the AX Lightness end of things

Anything come to mind that would work

Also, I'm also looking for a single superlight caliper- barely has to work since max speed is 6 mph and it is only used once.

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prendrefeu
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Joined: Wed Oct 31, 2007 10:32 pm
Location: Los Feliz, Los Angeles, California
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by prendrefeu

SRAM XX or Shimano XTR + tuning

or SRAM Red 2012+ Mid-cage (+ tuning), but I believe it only goes up to 32t.

Maybe cheapest solution: buy a used (pre-2012) SRAM Red RD ($100), tune, have fibrelyte or other provider create a longer cage so you can go up to 34t.
Exp001 || Other projects in the works.

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Illuminado
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Joined: Fri Feb 03, 2012 5:38 pm
Location: Sacramento, CA
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by Illuminado

I snagged an old 9spd XTR RD for about $60 that fully accomodates an 11-34 cassette, though I use it for CX. It works with 9 & 10spd Shimano just fine.

Something like this.

Exact Model is SHIMANO XTR 952 which weighs in at about 210g.
Who, what, huh?

bobqzzi
Posts: 54
Joined: Mon Feb 04, 2013 10:04 pm

by bobqzzi

prendrefeu wrote:SRAM XX or Shimano XTR + tuning

or SRAM Red 2012+ Mid-cage (+ tuning), but I believe it only goes up to 32t.

Maybe cheapest solution: buy a used (pre-2012) SRAM Red RD ($100), tune, have fibrelyte or other provider create a longer cage so you can go up to 34t.


looking at SRAM XX it lists at 190 grams which seems pretty good. How much could I expect to take off by "tuning" it?

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Werdna
Posts: 100
Joined: Sun Jun 17, 2012 3:45 am

by Werdna

XX derailluers are already fairly "tuned", iirc all of the limit bolts are alloy, and the cable clamp bolt is ti. You might be able to shave a few grams off the body of the der, but not without some heavy dremeling.

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