Crank Wobble!?
04-09-22, 10:32 AM
#1
Junior Member
Thread Starter
Join Date: Apr 2008
Posts: 160
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
Crank Wobble!?
I just installed my Sugino 75s, complete with the "official" Sugino 75 square taper BB and an Alter chainring.
There's obvious side-to-side wobble as I spin the crank. I was expecting something a little more "pro" with this setup. I don't have the bike with me ATM, but I'm gonna try re-installing the cranks on a different spindle location and checking the chainring.
Anybody ever experience this? Any ideas?
There's obvious side-to-side wobble as I spin the crank. I was expecting something a little more "pro" with this setup. I don't have the bike with me ATM, but I'm gonna try re-installing the cranks on a different spindle location and checking the chainring.
Anybody ever experience this? Any ideas?
04-09-22, 03:43 PM
#3
Guest
Join Date: Sep 2020
Posts: 2,888
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 1346 Post(s)
Liked 3,270 Times
in
1,439 Posts
If by "wobble" you mean that the chainring gets closer to (and further away from) the frame as it spins, make sure the chainring is seated evenly on all arms of the spider and the bolts are all similarly tight. If so, remove the chainring and place it on a flat surface and see if it's warped. If it isn't, watch the naked spider as you spin it -- is one (or more) of the arms bent? I'd be surprised if the BB has anything to do with it, but check to make sure the spindle tapers are the correct size for the cranks -- ISO vs JIS.
Likes For Rolla:
04-09-22, 05:11 PM
#5
Junior Member
Thread Starter
Join Date: Apr 2008
Posts: 160
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
If by "wobble" you mean that the chainring gets closer to (and further away from) the frame as it spins, make sure the chainring is seated evenly on all arms of the spider and the bolts are all similarly tight. If so, remove the chainring and place it on a flat surface and see if it's warped. If it isn't, watch the naked spider as you spin it -- is one (or more) of the arms bent? I'd be surprised if the BB has anything to do with it, but check to make sure the spindle tapers are the correct size for the cranks -- ISO vs JIS.
