aicabsolut
08-18-2008, 01:33 PM
(aka freehub wobble) How much is too much?
I remember having some slight wobble with the old cassette, and I just got a new one put on today with a new chain. I put the bike on the stand when I got home to check the derailleur tune, and I noticed that with the new equipment, shifting hadn't really improved (I had something obscene like 6500 miles on the old stuff--ooops, and shifting had recently gone from bad to worse). It was a bit better, but I still got a lot of hesitation shifting to larger cogs around the middle of the cassette, especially in the big ring. Tightening the cable didn't seem to do anything, and pretty soon I'd run into cable-too-tight symptoms. I noticed that there was a lot of space between the RD and the cassette in the big cog, so I fiddled with the B screw for the first time in 2 years. That helped the most. Shifting had only started going south in late Feb/early March, when the equipment was on another frame (so that eliminates derailleur hanger issues, which really can't be the case with both frames--and they look straight anyway). I started getting the chain checked then, and it has gotten the OK from the shops until late June when I got a "replace soon" message from them...and then I wound up taking a lot longer than I thought..to the point where I had to make a cassette purchase as well. Anyway,... it's still not great, and I haven't tested it under load yet. I was just wondering how much the cassette wobble could be causing my problems, if at all? Also, this cassette is a lot noisier when it freewheels, which shouldn't be right, because they shouldn't have changed my freehub, right? There's a bit of a metallic sound to it too when pedaling, but that improved when I got somewhere with the shifting problem, and that might also be the sound of the hollow plates and pins of the new superlight chain.
I took the wheel off and tried to see if there was any play in the cassette, and it seems to be tightened down on there properly. The wobble is also only apparent when freewheeling, just to be clear. I've read that a 1-2mm wobble is "acceptable," but I've never seen anyone else's wobble (I've played with tuning my BF's bike with at least 3 wheelsets--yes I tune his bike :p). I also feel like it wobbles more than before (which the shop said not to worry about about a 1.5 yrs ago).
I DO want new wheels, but I can't get them anytime soon, and I want these for training wheels anyway. They are cheap Shimano wheels (with supposedly sturdy Shimano hubs), and it's not really worth it to shell out $ for any new hub/freehub if I don't have to....
I remember having some slight wobble with the old cassette, and I just got a new one put on today with a new chain. I put the bike on the stand when I got home to check the derailleur tune, and I noticed that with the new equipment, shifting hadn't really improved (I had something obscene like 6500 miles on the old stuff--ooops, and shifting had recently gone from bad to worse). It was a bit better, but I still got a lot of hesitation shifting to larger cogs around the middle of the cassette, especially in the big ring. Tightening the cable didn't seem to do anything, and pretty soon I'd run into cable-too-tight symptoms. I noticed that there was a lot of space between the RD and the cassette in the big cog, so I fiddled with the B screw for the first time in 2 years. That helped the most. Shifting had only started going south in late Feb/early March, when the equipment was on another frame (so that eliminates derailleur hanger issues, which really can't be the case with both frames--and they look straight anyway). I started getting the chain checked then, and it has gotten the OK from the shops until late June when I got a "replace soon" message from them...and then I wound up taking a lot longer than I thought..to the point where I had to make a cassette purchase as well. Anyway,... it's still not great, and I haven't tested it under load yet. I was just wondering how much the cassette wobble could be causing my problems, if at all? Also, this cassette is a lot noisier when it freewheels, which shouldn't be right, because they shouldn't have changed my freehub, right? There's a bit of a metallic sound to it too when pedaling, but that improved when I got somewhere with the shifting problem, and that might also be the sound of the hollow plates and pins of the new superlight chain.
I took the wheel off and tried to see if there was any play in the cassette, and it seems to be tightened down on there properly. The wobble is also only apparent when freewheeling, just to be clear. I've read that a 1-2mm wobble is "acceptable," but I've never seen anyone else's wobble (I've played with tuning my BF's bike with at least 3 wheelsets--yes I tune his bike :p). I also feel like it wobbles more than before (which the shop said not to worry about about a 1.5 yrs ago).
I DO want new wheels, but I can't get them anytime soon, and I want these for training wheels anyway. They are cheap Shimano wheels (with supposedly sturdy Shimano hubs), and it's not really worth it to shell out $ for any new hub/freehub if I don't have to....