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#1
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cage length & cassette size
Hi,
What is the benchmark/guideline for rear derailleur cage length vs. cassette size? -- Joe |
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#2
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cage length & cassette size
Cage length has nothing to do with cassette size; it has to do with
total capacity (the total range of front and rear). A Dura-Ace short-cage derailleur will work fine on a downhill bike with a 12-34 cassette - assuming it only has one front chainring. A Dura-Ace short-cage will NOT work on a 12-21 rear cassette, if you use a triple front. You need to add up the total capacity and compare that with the derailleur's spec (available on Shimano's web site). |
#3
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cage length & cassette size
sunderland wrote: Cage length has nothing to do with cassette size; it has to do with total capacity (the total range of front and rear). A Dura-Ace short-cage derailleur will work fine on a downhill bike with a 12-34 cassette - assuming it only has one front chainring. A Dura-Ace short-cage will NOT work on a 12-21 rear cassette, if you use a triple front. But ultegra short cage will work with 12-27 cassette and a 52/39/30 rings. |
#4
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cage length & cassette size
On 12 Dec 2005 06:39:49 -0800, "
wrote: Hi, What is the benchmark/guideline for rear derailleur cage length vs. cassette size? The manufacturer's recommendation for maximum tooth count range is a starting place, and many users have found that it's often safe to exceed that recommndation by two teeth, sometimes more. If the range isn't known, then I figure that a short-cage der is usually good for up to a 24 tooth large sprocket, medium-cage der will handle up to about 28 teeth, and a long-cage will handle whatever you're likely to be able to buy. A lot depends on the specific der and cassette or freewheel combination; some will just barely work at the ranges described, others won't get there, and some can go beyond. If the specs are not known, the only way to be sure is to try it, fiddling with the adjustments to see if it can be made to work. http://sheldonbrown.com/derailer-adjustment.html contains a bunch of helpful tips about tweaking the adjustments on the rear der. -- Typoes are a feature, not a bug. Some gardening required to reply via email. Words processed in a facility that contains nuts. |
#5
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cage length & cassette size
No it won't, unless you avoid several gear combos.
Capacity of a RD-6600-SS is 29 teeth. (from http://www.shimano.com.au/publish/co...0_SI-5VG0B.pdf) Your range is (27 - 12) + (52 - 30) = 37 teeth. The capacity of a RD-6600-GS (mid length cage) is 37 teeth; that will work. The SS cage is meant for a double ring only. |
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