crankset install problems
01-12-11, 06:07 PM
#1
Junior Member
Thread Starter
Join Date: Aug 2010
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
crankset install problems
Hi,
I'm trying to assemble my first custom bike and am learning just how much I don't know.
I have a new Motobecane Le Champion frame and am trying to install a SRAM Rival crankset. I'm pretty sure the BB and the frame threads match up at 68mm, and I'm greasing the threads, but the BB on the drive side won't actually catch the threads and on the non-drive side it goes in just a little (maybe 5 turns) before it locks up. I'm using just my hands as I don't have an external BB tool, but don't know what the problem is as everything should just screw on I assume. Any suggestions would be helpful.
Thanks
I'm trying to assemble my first custom bike and am learning just how much I don't know.
I have a new Motobecane Le Champion frame and am trying to install a SRAM Rival crankset. I'm pretty sure the BB and the frame threads match up at 68mm, and I'm greasing the threads, but the BB on the drive side won't actually catch the threads and on the non-drive side it goes in just a little (maybe 5 turns) before it locks up. I'm using just my hands as I don't have an external BB tool, but don't know what the problem is as everything should just screw on I assume. Any suggestions would be helpful.
Thanks
01-12-11, 06:22 PM
#3
Senior Member
May need to have the threads chased. Also, if going with external bearing BB, you should have the BB faced.
01-13-11, 04:35 PM
#4
Senior Member
Join Date: Apr 2007
Posts: 6,763
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 1109 Post(s)
Liked 1,200 Times
in
760 Posts
You will need a GXP tool too - and preferably a torque wrench (more than one use if you're building up a complete bike).
I agree with the chasing - it should be cheap and easy for a bike shop to do. Most people agree with the facing part too, but a frame I recently purchased (Felt ZC) specifically stated do not face the BB.
I agree with the chasing - it should be cheap and easy for a bike shop to do. Most people agree with the facing part too, but a frame I recently purchased (Felt ZC) specifically stated do not face the BB.
01-13-11, 04:45 PM
#5
Senior Member
Join Date: Sep 2008
Location: Beautiful Long Beach California
Posts: 3,589
Bikes: Eddy Merckx San Remo 76, Eddy Merckx San Remo 76 - Black Silver and Red, Eddy Merckx Sallanches 64 (2); Eddy Merckx MXL;
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
Anyone know if it's English or Italian thread?
01-13-11, 05:18 PM
#6
Banned
read 'Motobecane Le Champion frame' so either OLD and perhaps French,Metric, 35mm R/R
or BD using the name on what is likely a PRC sourced frame , would be British pattern thread. 1.37" and R/L
or BD using the name on what is likely a PRC sourced frame , would be British pattern thread. 1.37" and R/L
