Bb bracket issue

[speeddemon]

Hi I’ve a carbon frame and needs a push fit bb I’ve got a sram Oct gxr crank which bb do I use

 

[figbat]

Hi I’ve a carbon frame and needs a push fit bb I’ve got a sram Oct gxr crank which bb do I use

You’ll need whichever pressfit BB is prescribed for your frame. There are a few to choose from. My frames with pressfit BBs have the standard written on the frame, underneath. Otherwise check the specs of the frame or bike.

Is it a GXP crankset? These have a stepped spindle - 24 mm at the driveside end and 22 mm at the non-driveside.

 

[speeddemon]

It’s a gxp crank , there’s nothing on the frame and I bought it second hand can’t find anything specs on the Frameset either

 

[Sharky]

With expensive components and uncertainty about exact details, this is when I would go to the LBS.

 

[speeddemon]

What’s the LBS

 

[Jenkins]

Are you sure on the bottom bracket being press fit? On your previous thread you said it has an English threaded one.
https://www.cyclechat.net/threads/english-threaded-bb-bracket-to-sram-oct-crank.303895/

LBS = Local Bike Shop

 

[speeddemon]

It’s a different bike frame , there’s nothing other frame is a friends , it’s definitely a push fit

 

[Jenkins]

In that case all I can suggest is (as above) to find out which BB was originally fitted and then see if there is a GXP equivalent (BB86 for example)

 

[Ming the Merciless]

What is the make and model of frame?

 

[speeddemon]

It’s an unknown frame uk made qachia z8

 

[speeddemon]

In that case all I can suggest is (as above) to find out which BB was originally fitted and then see if there is a GXP equivalent (BB86 for example)

Thanks I will find out from the guy who sold me it

 

[T4tomo]

It’s an unknown frame uk made qachia z8

UK sold, looks very Chineseum made.

Given you'll need correct tools to extract old and fit new BB, defo a trip to LBS called for, they can take the old out and measure it properly

 

[speeddemon]

Yeah think I will , it’s a English company I’ve been told

 

[figbat]

Yeah think I will , it’s a English company I’ve been told

It appears to be an English company who design the frames, but it’ll almost certainly be manufactured in China. From what I can tell they are no longer in business.

GPX pushfit BBs tend to be either BB92 or BB86, but I’d get it verified before committing.

 

[speeddemon]

It appears to be an English company who design the frames, but it’ll almost certainly be manufactured in China. From what I can tell they are no longer in business.

GPX pushfit BBs tend to be either BB92 or BB86, but I’d get it verified before committing.

Thanks for that cheers