SRAM GXP Bottom Bracket Spacers
10-29-18, 07:23 PM
#1
Member
Thread Starter
Join Date: Feb 2014
Location: SF Bay Area
Posts: 30
Bikes: 2004 Fuji Pro | 2012 Diamondback Podium 7 | 2013 Fondriest TF3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
SRAM GXP Bottom Bracket Spacers
For some reason, I'm having a really hard time figuring out how to install an SRAM GXP BB and crank. I bought a new Lynskey franne with a 68mm threaded bottom bracket, and I'm installing a SRAM Force 1 crank (some reason I'm hooked on the idea of building a 1x11 commuter). The SRAM GXP bottom bracket comes with a couple of 2.5mm spacers, and I'm not sure if i need them or not.
The rear hub spacing is 142mm, and I'm running a 11x30mm cassette. I installed the crank without the spacers, and the crank spins freely with no play. Still I wonder if I need the spacers for the chainline? Anyone run into this? SRAM's manual is not very clear.
Thank you!
The rear hub spacing is 142mm, and I'm running a 11x30mm cassette. I installed the crank without the spacers, and the crank spins freely with no play. Still I wonder if I need the spacers for the chainline? Anyone run into this? SRAM's manual is not very clear.
Thank you!
10-30-18, 01:44 AM
#2
bike whisperer
Join Date: Dec 2009
Location: Melbourne, Oz
Posts: 9,537
Bikes: https://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=152015&p=1404231
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1523 Post(s)
Liked 716 Times
in
508 Posts
How does the chain look on the middle cog? Nothing wrong with biasing the chainline either; you can have the chainring point to the middle of the gears you use most, as long as it still works acceptably all the way across.
10-30-18, 04:31 AM
#3
Senior Member
Join Date: Jan 2013
Location: South Jersey
Posts: 2,262
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 713 Post(s)
Liked 796 Times
in
473 Posts
No spacers are needed when installing a GXP road crank on a 68mm bottom bracket. GXP bottom brackets always come with the spacers, because they are used for both road and MTB applications. The spacers are for use with an MTB crankset when used on a 68mm bottom bracket shell. You are correct that the manual is not clear on this.
10-30-18, 06:41 AM
#4
Member
Thread Starter
Join Date: Feb 2014
Location: SF Bay Area
Posts: 30
Bikes: 2004 Fuji Pro | 2012 Diamondback Podium 7 | 2013 Fondriest TF3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Thanks for your responses, that makes sense. I'll leave them off and will see how the chainline turns out.
06-21-19, 11:04 PM
#5
Banned
Join Date: Mar 2018
Location: Providence
Posts: 732
Bikes: Specialized tarmac sl2 giant tcx zero
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 319 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
im thinking you will always need a wavy washer , i have the gxp bsa external bb and no matter what i need at least one small spacer to get rid of the tiniest amount of play that exists in the system , now for my other headache the internal pressfit gxp system i have no fn clue at this point !!!
