Bottom Bracket MTB how long should it last

[Sidmouth]

Droo but whats this..... http://www.endurofor....com/id228.html

once paid in $ and postage, cheaper just to buy a new GXP

[Sidmouth]

So I took my new GXP back to my LBS, they felt it and agreed that it already has a click on the drive side, they tried all there stock and all have this fault, So I have no BB, however it does look like you can replace the bearing on the drive side, anyone know the size? with that I can go to Bearing Man

[BogusOne]

Or what most people don't know, knock out the non drive side bearing. Inside that bearing knock out the step down spacer.

 

 

Now take that spacer and pop it into a shimano bearing and bobs your uncle. You can use a Shimano bb on your GXP crank. Been doing it for years and never had any problems.

 

This is the spacer you are looking for from the GXP bb.

 

 

http://i1081.photobucket.com/albums/j351/mkirby258/Crank1_zps3c48ed67.jpg

Edited March 4, 2014 by BogusOne

[rouxtjie]

Or what most people don't know, knock out the non drive side bearing. Inside that bearing knock out the step down spacer.

 

 

Now take that spacer and pop it into a shimano bearing and bobs your uncle. You can use a Shimano bb on your GXP crank. Been doing it for years and never had any problems.

 

This is the spacer you are looking for from the GXP bb.

 

 

http://i1081.photobucket.com/albums/j351/mkirby258/Crank1_zps3c48ed67.jpg

Great great post....wish I knew this a long time ago...that being said, only shimano cranks for me from now on

[BogusOne]

Great great post....wish I knew this a long time ago...that being said, only shimano cranks for me from now on

 

Yeah I hear you Rouxtjie but I must say the Sram crank with the removable spider is just so versatile, specially with the direct mount chainrings that's available lately.

[droo]

Good work Bogus. I remember buying Aerozine BBs that had a little spacer for GXP cranksets, but never got around to properly tearing down a GXP BB.

 

A project for downtime this week, if I have any...

[Flowta]

Or what most people don't know, knock out the non drive side bearing. Inside that bearing knock out the step down spacer.

 

 

Now take that spacer and pop it into a shimano bearing and bobs your uncle. You can use a Shimano bb on your GXP crank. Been doing it for years and never had any problems.

 

This is the spacer you are looking for from the GXP bb.

 

 

http://i1081.photobucket.com/albums/j351/mkirby258/Crank1_zps3c48ed67.jpg

 

Not possible with some of the GXP BBs, I had one at one stage where that bit was part of the inner race. Not pressfit in.

[Sidmouth]

Or what most people don't know, knock out the non drive side bearing. Inside that bearing knock out the step down spacer.

 

 

Now take that spacer and pop it into a shimano bearing and bobs your uncle. You can use a Shimano bb on your GXP crank. Been doing it for years and never had any problems.

 

This is the spacer you are looking for from the GXP bb.

 

 

http://i1081.photobucket.com/albums/j351/mkirby258/Crank1_zps3c48ed67.jpg

great post, thank you?

[BogusOne]

Not possible with some of the GXP BBs, I had one at one stage where that bit was part of the inner race. Not pressfit in.

 

Have never come across one with that part being part of the inner race. I do remember battling to get one out not so long ago then I just got a bigger hammer instead of the rubber mallet and moered harder. Eventually got it out....

 

You can even use a piece of 22mm copper pipe(plumbing) as a spacer the things I've done with bicycles eish

[Sidmouth]

Not possible with some of the GXP BBs, I had one at one stage where that bit was part of the inner race. Not pressfit in.

maybe Sram have cottoned onto this and redesigned there new BB

[rouxtjie]

maybe Sram have cottoned onto this and redesigned there new BB

They would...naaaaiers!!!!

 

maybe they should put more effort into its function rather designing it to stop copies

 

ok rant over...got that off my chest

[Flowta]

Have never come across one with that part being part of the inner race. I do remember battling to get one out not so long ago then I just got a bigger hammer instead of the rubber mallet and moered harder. Eventually got it out....

 

You can even use a piece of 22mm copper pipe(plumbing) as a spacer the things I've done with bicycles eish

maybe Sram have cottoned onto this and redesigned there new BB

 

It was quite a while ago and I haven't seen it in a while.

 

I think they used it originally but it would be a lot cheaper for the to use the spacer as you can use standard bearings than to have propriety bearings made

[Newboy]

GXP....there is your problem. They are just kuk, I have tried everything to get longer life out of my GXP bb's...grease once a week, stand the bike upside down after a wash for hours, drill drainage hole in frame...best was 1100km out of a bb, worst was 470km...all logged in sporttracks. They are just hondnaai

 

Here is the good news...you can motivate buying a new crank

 

Switched to shimano BB's...havent been able to kill one yet.

 

Exactly the same experience. On Shimano now and yet to replace a BB after 3000km plus.

[droo]

maybe Sram have cottoned onto this and redesigned there new BB

 

Pretty much what Shimano did when they found out that someone other than their techies knew what a bearing press was. They redesigned the cup so it's almost impossible to get the old bearing out without a blind bearing puller, and changed the bearing to a proprietary size so you can't just pop off and pick one up from Bearing Man.

 

Hooray for planned redundancy.

 

[Flowta]

Pretty much what Shimano did when they found out that someone other than their techies knew what a bearing press was. They redesigned the cup so it's almost impossible to get the old bearing out without a blind bearing puller, and changed the bearing to a proprietary size so you can't just pop off and pick one up from Bearing Man.

 

Hooray for planned redundancy.

 

 

I've only had that issue with XTR BBs. I'll be due to replace/clean/service my BB in a few months time.

[RossW]

Rouxtjie, I killed my XT BB in the Sabie mud. I also had some hiccups with the GXP - rode in PMB for 3 years on one GXP. Move to JHB and go through 3 in 18 months. I saved some cash and went for SLX BB yesterday. Weighs maybe 10g more but only cost me R210.