Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

RaceFace Turbine cranks problem (play)

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

RaceFace Turbine cranks problem (play)

Old 10-27-20, 11:55 PM
  #1  
Bike Gremlin
Mostly harmless
Thread Starter
 
Bike Gremlin's Avatar
 
Join Date: Nov 2010
Location: Novi Sad
Posts: 4,176

Bikes: Custom made on Scott Speedster frame, Custom made on a 1996. steel MTB frame (all but frame changed at least once in the past 20 years).

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 994 Post(s)
Liked 46 Times in 31 Posts
RaceFace Turbine cranks problem (play)

Tried google, manufacturer website manuals etc. Didn't help.

An acquaintance got a 2nd hand bicycle that has some noticeable play in the cranks.
Cranks are RaceFace Turbine. Bottom bracket is a press fit one. There is no noticeable problem with the BB bearings, but seems to be too much free space where the axle goes through the right hand side BB bearing.
The axle is 24 mm wide at the part that's near the bearings (both left and right), left hand side bearing is 24 mm wide on the inside, while the right hand side BB bearing is about 25 mm wide on the inside.

Cranks don't have any spacer that seems to fit in the gap to prevent it from having play. So even when properly tightened, they still have play.

Recorded a video showing the problem - if it helps anyone provide any info, or help.

Bike Gremlin is offline  
Old 10-28-20, 04:14 AM
  #2  
dsaul
Senior Member
 
Join Date: Jan 2013
Location: South Jersey
Posts: 1,951
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 586 Post(s)
Liked 457 Times in 311 Posts
I don't know what is supposed to be there on the Raceface crankset, but a SRAM GXP bottom bracket uses a plastic spacer on the drive side to take up the extra space in the bearing inner diameter. If you have a GXP bottom bracket, try the plastic spacer that is inside the drive side bearing. On the GXP it acts as a spacer for the bearing/spindle interface and as a dust cover for the bearing.
dsaul is offline  
Old 10-28-20, 06:48 AM
  #3  
Bike Gremlin
Mostly harmless
Thread Starter
 
Bike Gremlin's Avatar
 
Join Date: Nov 2010
Location: Novi Sad
Posts: 4,176

Bikes: Custom made on Scott Speedster frame, Custom made on a 1996. steel MTB frame (all but frame changed at least once in the past 20 years).

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 994 Post(s)
Liked 46 Times in 31 Posts
Originally Posted by dsaul View Post
I don't know what is supposed to be there on the Raceface crankset, but a SRAM GXP bottom bracket uses a plastic spacer on the drive side to take up the extra space in the bearing inner diameter. If you have a GXP bottom bracket, try the plastic spacer that is inside the drive side bearing. On the GXP it acts as a spacer for the bearing/spindle interface and as a dust cover for the bearing.
You mean reverse the order of the two... spacers/washers shown on the drive side?
Bike Gremlin is offline  
Old 10-28-20, 07:23 AM
  #4  
dsaul
Senior Member
 
Join Date: Jan 2013
Location: South Jersey
Posts: 1,951
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 586 Post(s)
Liked 457 Times in 311 Posts
Originally Posted by Bike Gremlin View Post
You mean reverse the order of the two... spacers/washers shown on the drive side?
No. I mean take the plastic bushing/dust cover from a GXP bottom bracket and put it in the drive side bearing of the Raceface bottom bracket. GXP bottom brackets have the same type of drive side bearing that is larger than the spindle and that plastic bushing/dust cover takes up the extra space. I have a bunch of old GXP bottom brackets that I keep around just for taking parts like that.

I can't see the large spacer clearly in your video, but it looks like it may have a stepped down area on one side that might fit into the bearing.
dsaul is offline  
Old 10-28-20, 07:40 AM
  #5  
Iride01
Hits [ENTER] b4 thinking
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 8,250

Bikes: '20 Tarmac Disc Comp '91, '78 Raleigh Competition GS

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 3250 Post(s)
Liked 1,842 Times in 1,308 Posts
Did you run through their BB selection tables and find out if that is the correct or compatible BB for that bike and crank?

https://res.cloudinary.com/fox-facto...nes_omaj5n.pdf
Iride01 is offline  
Likes For Iride01:
Old 10-30-20, 11:17 AM
  #6  
Bike Gremlin
Mostly harmless
Thread Starter
 
Bike Gremlin's Avatar
 
Join Date: Nov 2010
Location: Novi Sad
Posts: 4,176

Bikes: Custom made on Scott Speedster frame, Custom made on a 1996. steel MTB frame (all but frame changed at least once in the past 20 years).

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 994 Post(s)
Liked 46 Times in 31 Posts
I have eliminated the play. Placing one thin (0.5 mm) spacer from my spare parts bin on the left hand side of the axle (slid it on top of the existing spacer). Not the "original" (RaceFace) part.
Not 100% sure, but looks good (and no play).

The dimensions:

Axle is 116 mm long (from left crank inner face to the end of the axle). Wide 23.5 mm in the mid section, with ends (parts that are aligned with the BB bearings) being 24 mm wide. Like Shimano 24 mm Hollowtech II axles.
Length from the left crank inner face to the end of the right hand side 24 mm wide axle part is 95 mm.

Frame BB shell is 92 mm wide.

Bearings mark says:
X-Type f 41 mm Press Fit for:
BB107 | BB92 | BB89.5 | BB86.5

And the cover of the left hand side bearing says:
X-Type, Outer Race, D30300

Spacers:
Left side of the axle has one rubber seal, then one 1.2 mm wide spacer.

On the right side, there's a cover that goes directly over the bearing. Then a steel part that is 4.5 mm thick at the base, then has a section that gets narrowed down (to the outer diameter of about 24mm). On top of it, a spacer that is 2.3 mm thick is placed - half black, half red. And it is slid so that narrower part with the spacer faces the frame (if I got the instructions correctly).

Is my adding of a 0.5 mm spacer at the left hand side (slightly larger diameter than perfect, but is held in place, doesn't slide over the other left hand side spacer) a good idea? Or do you think I should look for a different solution?

The cranks spin smoothly (tested with the chain off), and there is no longer any noticeable play.
Bike Gremlin is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.