New cassette shifting hard
#1
Senior Member
Thread Starter
Join Date: Aug 2012
Location: Los Alamitos, Calif.
Posts: 2,505
Bikes: Canyon Endurace
Liked 947 Times
in
552 Posts
New cassette shifting hard
I just replaced my 9speed Shimano cassette that came stock on my Trek 7.4 FX with a Shimano HG80 9 speed cassette. I would have thought that this would be a pretty clean swap, but although everything remained the same and the new setup seems to work fine when shifting on my bike stand, once I get on the bike and apply pressure by peddling the shifts become very clunky and stiff. I am currently using the stock KMC chain that came with it. Should I be looking for a HG compatible chain?
The rear derailleur seems to be adjusted fine. I'm going to take the night off and look at it again tomorrow so I can go over in my head what I might be missing.
The rear derailleur seems to be adjusted fine. I'm going to take the night off and look at it again tomorrow so I can go over in my head what I might be missing.
#2
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 39,331
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Liked 3,173 Times
in
1,754 Posts
Did you also replace the chain? and if not, how old was it?
Otherwise it could be as simple as a trim adjustment. All cassettes don't sit identically on freehubs, so changing cassettes often calls for small trim adjustments to match their position.
Otherwise it could be as simple as a trim adjustment. All cassettes don't sit identically on freehubs, so changing cassettes often calls for small trim adjustments to match their position.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
#3
Senior Member
Thread Starter
Join Date: Aug 2012
Location: Los Alamitos, Calif.
Posts: 2,505
Bikes: Canyon Endurace
Liked 947 Times
in
552 Posts
I'm going to guess the chain may have 2000 miles on it. It's been well maintained with deep regular cleanings and lube. I'm going to spend a bit more time with it this afternoon and see if I can dial it in a little more.
#4
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,274
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Liked 4,093 Times
in
2,423 Posts
As Francis suggests, replace the chain. I'm no fan of KMC chains (although they do have their supporters) and would recommend either the SRAM or Shimano using a connector link. Then do a complete readjustment of the shift system. Limit range and SIS (cable tension). Often a different cassette is slightly more inboard or out board then the old one. Andy.
#5
Really Old Senior Member
+1 to the above.
I expect to have to turn the barrel adjuster a "bit" whenever changing a cassette.
1 turn isn't abnormal.
Another thing I've seen on some cassettes is the amount of rivet protrusion on the largest cog.
I've had to file the heads down on a low end Shimano 11-34 9 speed. I couldn't get good purchase on the lock ring until I did.
I expect to have to turn the barrel adjuster a "bit" whenever changing a cassette.
1 turn isn't abnormal.
Another thing I've seen on some cassettes is the amount of rivet protrusion on the largest cog.
I've had to file the heads down on a low end Shimano 11-34 9 speed. I couldn't get good purchase on the lock ring until I did.
Last edited by Bill Kapaun; 10-14-14 at 10:21 AM.
#7
Senior Member
Thread Starter
Join Date: Aug 2012
Location: Los Alamitos, Calif.
Posts: 2,505
Bikes: Canyon Endurace
Liked 947 Times
in
552 Posts
Thank you for all the help and suggestions. I spent another 1/2 hour with it today and I just can't get rid of the "clunk" between 2 or 3 gears. It just feels like it's hanging onto a tooth just a little too long and then slams into the next sprocket. Since chains don't cost that much I'm going to go and pick me up a Shimano chain to see if that helps. To answer one of your questions... I went for 11-32 to 11-28. I'm not sure how that would change much in the drive train adjustments but I'm always open for suggestion.
#8
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 39,331
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Liked 3,173 Times
in
1,754 Posts
Buying a new chain may help, but may not be necessary. Start by measuring your old chain for stretch, and if it's less than 1/4% (1/32"over 12") or fairly new, you shouldn't have to replace it. Often slight older chains are a bit more flexible, and more prone to "power shifting" under load (or even when not). This lets them force themselves deeper onto the sprockets during the shift than a new chain would.
Some break-in and you adjusting your "touch" as needed can resolve this by itself soon enough.
OTOH- if you measure the chain and it's near the end of it's service life (approaching 1/16" over 12), this is as good a time to replace as any.
Some break-in and you adjusting your "touch" as needed can resolve this by itself soon enough.
OTOH- if you measure the chain and it's near the end of it's service life (approaching 1/16" over 12), this is as good a time to replace as any.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Thread
Thread Starter
Forum
Replies
Last Post
itsthewoo
General Cycling Discussion
9
10-29-10 05:54 AM