AIR9 RDO - PF30 / BOR XC666 problem

[Elbaceever]

Hi All

I'm new here on the forum Allow me to quickly introduce myself..
I'm a Belgian XC rider that has 2 Niners. (Jet 9 RDO + Air9 RDO)
However on my AIR9 I have a fair amount of issues with my BOR Crank XC666. My LBS is also in the dark and proposes to use a Sram XO crank. (using GPX) Not really fond of replacing this (expensive) crank already. I was wondering if someone here could help? I'm not a techie so I'll try to explain the best I can..

Problem:

After some time my crank gets a bit pushed out of the PF30 BB. This results in shifting problems on my rear cog. (shift onto my 36 cog). I'll have to go to my LBS to get this fixed. (sometimes twice a month!) Also when I ride in rainy conditions, dirt is coming very quickly between the seals. Very annoying to listen to a "sandy crank" Extensive cleaning doesn't help.

Anyone who could help me out? If more info is needed, let me know.

I'll post some pics of my rides later on in the RDO thread

Crank: BOR 666XC-29er - 2X - Smart Spindle System | B.O.R - Germany


PS: I already looked into the "pf30 experiance dbb" thread but have not found a solution yet..


Cheers

[sand0kan]

There are a lot of problems with the Bor bearings. My own experience is not good either. I moved my Tune Crank which is the same principle as Bor to my Rip which uses BSA.

I know that Busybee (importer of Niner and Bor) is gonna try to use Phil Wood Bearings because of these problems.

Perhaps you can contact them. You can always Pb me and write in dutch if that is easier.

[CarManDSL]

On my Air9 RDO rigid, I installed the Sram PF30 BB and run XX1 cranks.

Installed with a very very light coating of grease on the frame where cups press in.

No squeaks. No issues.

[brightsky]

Not familiar with those cranks, but the bb30 cranks I have installed (SRAM) include a tension adjuster on the non drive.

Overall, it just sounds like your cranks are loosening up. Maybe a wave washer and a little thread locker would solve it.

[Elbaceever]

thx all for the comments. I'll check if the problem can be solved with a Sram bb.