Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

sram cassette compatibility problem

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

sram cassette compatibility problem

Old 01-13-09, 11:20 AM
  #1  
pothound
Senior Member
Thread Starter
 
Join Date: Aug 2005
Posts: 76
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
sram cassette compatibility problem

i bought a sram 970 9 speed 11-34 cassette. it is supposed to be compatible with shimano.
i have an hg73 chain and a rmd 761 xt rear derailleur on my road bike. the shifters are sti ultegra. i cnnot stop it from making noises. it looks like the chain and cassette don't mesh together. am i missing something here? the tech at nashbar suggest i send it back and re-order shimano lx m580 cassette. do you have any thoughts or ideas? thanks in advance
pothound
pothound is offline  
Old 01-13-09, 11:26 AM
  #2  
sch
Senior Member
 
Join Date: May 2003
Location: Mountain Brook. AL
Posts: 3,566
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 188 Post(s)
Likes: 0
Liked 7 Times in 7 Posts
There should be complete compatibility of the chain/cassette in this
scenario. Have you checked the chain for wear? IME you get, at
most, two chains for each cassette ie when you wear out the second
chain, the cassette is toast. So a new cassette with a somewhat
worn chain will not mesh well.
sch is offline  
Old 01-13-09, 12:05 PM
  #3  
Kotts
Recreational Commuter
 
Join Date: Apr 2006
Location: Central Ohio
Posts: 1,022

Bikes: One brand-less build-up, and a Connondale Synapse Carbon Ultegra Disc. A nicer bike than I need, but it was a good deal, so... ;-)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 3 Times in 1 Post
+1 on the chain wear. If you went a along time withthe same chain and casette, a new casette with the old chain will be noisy.

the other thing to check is the adjustment on the rear der. Indexed shifting systems may need a slight "tweak" with a casette change, even within the same brand or series.
Kotts is offline  
Old 01-13-09, 03:32 PM
  #4  
Bill Kapaun
Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Posts: 10,789

Bikes: 86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 661 Post(s)
Liked 26 Times in 22 Posts
"derailleur on my road bike"

Unless you have a "mountain" RDER, it won't handle a 34T cog.

What was the tooth count of the previous cassette?
Bill Kapaun is offline  
Old 01-13-09, 04:45 PM
  #5  
jl0703
Ready to Ride
 
jl0703's Avatar
 
Join Date: May 2007
Location: Staten Island
Posts: 73

Bikes: Giant OCR2, Miyata Seven Twelve, Trek 7.2 FX

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
He has an XT 761 RD. That's fine with his cassette. His problem is most likely a stretched chain with the new cassette
jl0703 is offline  
Old 01-13-09, 08:37 PM
  #6  
pothound
Senior Member
Thread Starter
 
Join Date: Aug 2005
Posts: 76
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
thank you
after studying the problem, i agree. the chain is fairly new so i thought i could use it. the xt derailleur is new. i'm considering a cassette and a hg93 chain. i don't like noise. that should take care of the problem.
i appreciate your help
pothound
pothound is offline  
Old 01-13-09, 09:10 PM
  #7  
Bill Kapaun
Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Posts: 10,789

Bikes: 86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 661 Post(s)
Liked 26 Times in 22 Posts
OOPS- missed "the small print"
Bill Kapaun is offline  
Old 01-31-09, 09:14 AM
  #8  
pothound
Senior Member
Thread Starter
 
Join Date: Aug 2005
Posts: 76
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
hi sorry it took so long
i bought a shimano lx 11-34 cassette and a hg93 shimano chain. as a test i removed the sram cassette and installed the shimano cassette. i left the old chain on. it worked perfectly, no noise. their must be a slight difference between them. another thought is my chainline could be better. should i install the new chain? what are your thoughts?
thank you pothound
pothound is offline  
Old 01-31-09, 11:31 AM
  #9  
frankenmike 
mechanically sound
 
frankenmike's Avatar
 
Join Date: Jan 2007
Location: Dover, NH
Posts: 1,483

Bikes: Indy Fab steel deluxe, Aventon cordoba, S-works stumpy fsr, Masi vincere, 92 Hardrock commuter, Dahon mu uno, Outcast 29

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 40 Post(s)
Likes: 0
Liked 5 Times in 3 Posts
Unless it's a case of simple adjustment, I am truly baffled. Both cassettes are functionally identical unless you got a lemon. I would put the new chain on if it were me- why grind down a new cassette to a slightly stretched chain.
frankenmike is offline  
Old 01-31-09, 06:42 PM
  #10  
Bill Kapaun
Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Posts: 10,789

Bikes: 86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 661 Post(s)
Liked 26 Times in 22 Posts
What are the tooth counts of the "old" cassette?
Are both chains the same length?
Was the "B" screw adjusted for the new cassette, if the new cassette is a different tooth count from the old one?
Bill Kapaun is offline  
Old 02-01-09, 08:45 AM
  #11  
pothound
Senior Member
Thread Starter
 
Join Date: Aug 2005
Posts: 76
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
both, the sram and the shimano cassettes are 11-34. i did have to turn in the b-screw. i was hoping each would work the same. shimano prices are getting out of range. maybe a sram chain would have solved the problem. too late, the tech had me send the sram back.
thank you pothound
pothound is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
iforgotmename
Touring
1
02-13-11 01:49 PM
mzeffex
"The 33"-Road Bike Racing
0
01-13-10 08:15 PM
Pamestique
United Kingdom
1
08-07-08 04:28 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.