Cameron
11-21-2016, 03:53 PM
OK, I'm finishing up the drivetrain on 26" Specialized Epic Comp. I'm setting it up 1x10 with Shimano SLX shifter, SLX cassette and ZEE derailleur. The wheels are a few year old Deore XT.
Last night I slipped the cassette onto the freehub and tightened the lock ring down to 40nm with a torque wrench. Next I put the wheel on the bike and installed the chain. Verified everything was tight and that the wheel was firmly all the way up in place in the rear dropouts. Next I gave the crank some turns by hand and let the rear freewheel. That's when I noticed what seems to be to be a lot of wobble in the cassette when freewheeling.
My first thought was maybe I didn't actually cinch down the cassette properly or that maybe I did need to include a 1mm spacer behind the cassette since it's a 10 speed cassette going on a 9/10 Shimano freehub. So I took it back apart, made sure there was no debris between the back of the cassette and the hub, etc. Then I restacked the cassette on there (again w/out a 1mm spacer) and verified the height of the "top" of the cassette (littlest cog) was well proud of the top of the freehub to ensure the lock ring had room to tighten all the way down. Plenty of space there so re-tightened the cassette, re-install on the bike and same thing. Still a good amount of wobble when freewheeling.
Next, tried it with the 1mm spacer behind the cassette and still the same thing. Installed a different cassette (Shimano 105) and same thing. Next I pulled the cassette completely and just spun the thing up by hand holding one end on the axle by hand and the other hand holding the freehub body and just watching the freehub to axle relationship. Doing this I can clearly see it's the freehub body wobbling vs. the axle when freewheeling. Freehub body feels tight in the hub and while the hub bearings feel a little like they could use a re-greasing I don't feel any "catch" spots in the rotation that might make me believe the axle is bent.
I didn't take a video of my exact setup on my bike, but did find a video on YouTube showing exactly what I'm seeing on my bike. I converted it to a gif for easier posting here. See below. This is just about exactly the same amount of wobbling I'm seeing on my setup.
https://j.gifs.com/X6nRMl.gif
Is this normal? I've heard many times before "some" wobble is normal but I don't have any benchmark on what would be considered normal vs. excessive. Neither of the other 2 geared bikes I ride right now do this and both are equipped with Shimano cassettes. One is a Chris King hub and the other is a 5800 Shimano hub.
For reference on the bike I'm having this wobble on it's a Deore XT, WH-M775-R hub and an SLX, HG81 cassette.
I was thinking my next step was to pull the axle out of the hub and see if it's actually bent?
Last night I slipped the cassette onto the freehub and tightened the lock ring down to 40nm with a torque wrench. Next I put the wheel on the bike and installed the chain. Verified everything was tight and that the wheel was firmly all the way up in place in the rear dropouts. Next I gave the crank some turns by hand and let the rear freewheel. That's when I noticed what seems to be to be a lot of wobble in the cassette when freewheeling.
My first thought was maybe I didn't actually cinch down the cassette properly or that maybe I did need to include a 1mm spacer behind the cassette since it's a 10 speed cassette going on a 9/10 Shimano freehub. So I took it back apart, made sure there was no debris between the back of the cassette and the hub, etc. Then I restacked the cassette on there (again w/out a 1mm spacer) and verified the height of the "top" of the cassette (littlest cog) was well proud of the top of the freehub to ensure the lock ring had room to tighten all the way down. Plenty of space there so re-tightened the cassette, re-install on the bike and same thing. Still a good amount of wobble when freewheeling.
Next, tried it with the 1mm spacer behind the cassette and still the same thing. Installed a different cassette (Shimano 105) and same thing. Next I pulled the cassette completely and just spun the thing up by hand holding one end on the axle by hand and the other hand holding the freehub body and just watching the freehub to axle relationship. Doing this I can clearly see it's the freehub body wobbling vs. the axle when freewheeling. Freehub body feels tight in the hub and while the hub bearings feel a little like they could use a re-greasing I don't feel any "catch" spots in the rotation that might make me believe the axle is bent.
I didn't take a video of my exact setup on my bike, but did find a video on YouTube showing exactly what I'm seeing on my bike. I converted it to a gif for easier posting here. See below. This is just about exactly the same amount of wobbling I'm seeing on my setup.
https://j.gifs.com/X6nRMl.gif
Is this normal? I've heard many times before "some" wobble is normal but I don't have any benchmark on what would be considered normal vs. excessive. Neither of the other 2 geared bikes I ride right now do this and both are equipped with Shimano cassettes. One is a Chris King hub and the other is a 5800 Shimano hub.
For reference on the bike I'm having this wobble on it's a Deore XT, WH-M775-R hub and an SLX, HG81 cassette.
I was thinking my next step was to pull the axle out of the hub and see if it's actually bent?