2:1 vs. 1:1

Phil said:

Has anyone here found that SRAM's rders cause less ghost shifting compared to Shimano's offerings,
because of the 1:1 actuation ratio? Reliability concerns?

The last Shimano rear derailleur I had was a friction-shift unit on a 1987 MTB, so I can't say how
well/poorly their indexed stuff works.

That being said, the 2001 SRAM 7.0 on my RANS Rocket has worked very well. The only minor gripe I
have with it is that the shifters are a bit on the loud side; the higher-end shifters are quieter.
Durability has been excellent, in any case.

By comparison, the pre-SRAM Sachs Centera on my trike (2:1, part of a 3x7 gearhub-with-cassette
combo) is rather finicky to adjust, and sometimes has ghost shift problems; it was much worse before
I figured out that whoever set the trike up for the previous owner had used brake cable housing for
the shift cables. The gearhub doesn't object to brake housing, but the derailleur hates it.
--
Russ [email hidden] the wabbit to despam "Until you have had a case
of Hamm's, you can't understand what Americans do to beer." - "Yellowbeard," on kuro5hin.org

Quoted message said:

By comparison, the pre-SRAM Sachs Centera on my trike (2:1, part of a 3x7 gearhub-with-cassette
combo) is rather finicky to adjust, and

Do you mean that the gearhub has three gears internally and 7 externally? I think I'm finally
understanding these weird things....

--
Phil, Squid-in-Training

I put a cheapo 3.0 rd on the off road tandem 'cause I would be less broken hearted when I wipe it
threading through the rough. With 8 foot of cable the $20 rear D. is like a timex. Tom

--
Bruni Bicycles "Where art meets science" brunibicycles.com
410.426.3420 Phil, Squid-in-Training <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Quoted message said:

By comparison, the pre-SRAM Sachs Centera on my trike (2:1, part of a 3x7 gearhub-with-cassette
combo) is rather finicky to adjust, and

Do you mean that the gearhub has three gears internally and 7 externally?

I

Quoted message said:

think I'm finally understanding these weird things....

--
Phil, Squid-in-Training

Phil said:

Quoted message said:

By comparison, the pre-SRAM Sachs Centera on my trike (2:1, part of a 3x7 gearhub-with-cassette
combo) is rather finicky to adjust, and

Do you mean that the gearhub has three gears internally and 7 externally? I think I'm finally
understanding these weird things....

Indeed, that's what it is, a three-speed gear hub with a cassette body. It has been superseded by
the SRAM DualDrive, which can be set up as 3x8 or 3x9, depending on the shifter and cassette you
use. The trike in question has the 3x7, plus a triple crankset for 63 total combinations. In
practice, I normally use only the middle chainring, but it's handy to have the granny gear for
extreme hill climbs, and the big ring is nice to have on downhill runs.

--
Russ [email hidden] the wabbit to despam "Hi Rex! I'm Barney! Won't
you be my *CHOMP*"