11-34t megarange cassette, Shimano vs SRAM
08-04-17, 07:15 PM
#1
Senior Member
Thread Starter
Join Date: Jan 2017
Posts: 1,052
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 345 Post(s)
Likes: 0
Liked 117 Times
in
85 Posts
11-34t megarange cassette, Shimano vs SRAM
Hi I have an old Dahon Speed TR that came with a SRAM Dual Drive and a Shimano 11-32T 8-spd cassette. I'm going to change the front chainring, so I thought I might as well change the cassette and chain.
I was wondering if the megarange cassette with 11-34T would work?
Would there be any problems with shifting on the 34T cog? Clearance?
I noticed on Sheldonbrown that the 11-32t range on the Shimano is 11-13-15-18-21-24-28-32 while the SRAM is 11-12-14-16-18-21-26-32. The difference is the SRAM is spaced closer at the upper gears and farther at the lower gears, which seems better for me, as I'm usually on the 13-15-18-21 gears.
Will there be shifting problems if I switched to the SRAM cassette? The shifter is SRAM.
https://www.sheldonbrown.com/k8.shtml
I was wondering if the megarange cassette with 11-34T would work?
Would there be any problems with shifting on the 34T cog? Clearance?
I noticed on Sheldonbrown that the 11-32t range on the Shimano is 11-13-15-18-21-24-28-32 while the SRAM is 11-12-14-16-18-21-26-32. The difference is the SRAM is spaced closer at the upper gears and farther at the lower gears, which seems better for me, as I'm usually on the 13-15-18-21 gears.
Will there be shifting problems if I switched to the SRAM cassette? The shifter is SRAM.
https://www.sheldonbrown.com/k8.shtml
08-04-17, 09:05 PM
#2
Senior Member
Join Date: May 2014
Location: Singapore
Posts: 470
Bikes: Voodoo Hoodoo, Linus Libertine
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 106 Post(s)
Likes: 0
Liked 15 Times
in
9 Posts
What rd are you using? Anyway i think 34t should work. Just 2 additional teeth.
Not sure if SRAM would work, but i believe there should be enough play in your pulleys that 8 speed cassette from different brand would work. My bike with Alivio rd medium cage came with DNP 11-21, then i changed it to Sunrace 11-32, then i changed it to Sunshine 12-32. All work perfectly without adjustment and even changing between wheelsets.
Not sure if SRAM would work, but i believe there should be enough play in your pulleys that 8 speed cassette from different brand would work. My bike with Alivio rd medium cage came with DNP 11-21, then i changed it to Sunrace 11-32, then i changed it to Sunshine 12-32. All work perfectly without adjustment and even changing between wheelsets.
08-05-17, 10:39 AM
#3
Banned
Mega range is a 24 to 34t jump, I like 24, 28 or 29, then the 34t cog combinations..
I cannot predict future performance of your purchases in advance.
I cannot predict future performance of your purchases in advance.
08-05-17, 06:29 PM
#4
deleteme
Join Date: Feb 2008
Location: PNW lifer
Posts: 587
Bikes: deleteme
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 50 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
The 8 speed 11-34 Shimano offering is the only cassette I have ever thrown away before wearing it out.
Sunrace offers up a much better looking 12-34 and 12-32. 12-14-16-18-21-24-28-34(2)
I did a 2700ft to 7800ft over 26mile climb on both cassettes. The 26-34 jump is just too big when trying to find a comfort zone while on a brutal climb.
Sunrace offers up a much better looking 12-34 and 12-32. 12-14-16-18-21-24-28-34(2)
I did a 2700ft to 7800ft over 26mile climb on both cassettes. The 26-34 jump is just too big when trying to find a comfort zone while on a brutal climb.
08-06-17, 11:06 PM
#5
Senior Member
Thread Starter
Join Date: Jan 2017
Posts: 1,052
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 345 Post(s)
Likes: 0
Liked 117 Times
in
85 Posts
I have the original SRAM X7 rd (2004?) that came with the Dual Drive II 24 (2009?). The 2002 manual says Dual Drive II 27 / 24 both use short 75mm derailleur cage, although the Dual Drive II 27 says max 34T and the Dual Drive II 24 says max 32T. This might just be the cassette that comes with the set.
Not really sure if 34T would fit. But Maybe?
I had a look at the difference between:
SRAM 11-32T (11, 12, 14, 16, 18, 21, 26, 32) x 39T chainring
Sunrace 12-34T (12, 14, 16, 18, 21, 24, 28, 34) x 42T chainring
The SRAM seems to have an extra step at the low and high end with more uniformity, but with more complicated shifting at the low end.
I can't seem to attach my gear in table.
I drew the gear switching order in the link below.
https://ibb.co/bHPsba
Sheldon-Brown's-Bicycle-Gear-Calculator-Table-1.jpg
Not really sure if 34T would fit. But Maybe?
I had a look at the difference between:
SRAM 11-32T (11, 12, 14, 16, 18, 21, 26, 32) x 39T chainring
Sunrace 12-34T (12, 14, 16, 18, 21, 24, 28, 34) x 42T chainring
The SRAM seems to have an extra step at the low and high end with more uniformity, but with more complicated shifting at the low end.
I can't seem to attach my gear in table.
I drew the gear switching order in the link below.
https://ibb.co/bHPsba
Sheldon-Brown's-Bicycle-Gear-Calculator-Table-1.jpg
Last edited by tomtomtom123; 08-06-17 at 11:11 PM.
08-07-17, 11:03 AM
#7
Senior Member
Join Date: Sep 2015
Posts: 663
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 239 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
With dual drive I would not jump to a 34 from a 32. You don't need it. Another chance to make something that works well not work as well.
SRAM and Shimano cassettes 10--9---8 speed are all interchangeable with SRAM and have the same spacing between the gears. 10 to 10 and 9 to 9 and 8 to 8....
This is not true with 11 speed shimano road ---11 speed shim mtn---11 speed sram mtn.
SRAM and Shimano cassettes 10--9---8 speed are all interchangeable with SRAM and have the same spacing between the gears. 10 to 10 and 9 to 9 and 8 to 8....
This is not true with 11 speed shimano road ---11 speed shim mtn---11 speed sram mtn.
