Shimano BB on a FSA crank?

[Mongoose!]

Can any one tell me if I can use a Shimano BB (Ultegra) with a FSA carbon SLK crank?

 

Bought it on the Hub, but want to use it with a new BB. It came with the "Mega Exo" BB.

 

When I installed the "Mega Exo" BB on my Specialized frame, I was unable to screw both cubs to the frame to "lock". There is like a 1mm gap on one side, as the "BB tube inside" is too long.

 

I went to the bike shop, and got a 2mm spacer. Now both cups are perfect on the frame, but the BB is now 1mm longer as the spacer is between the frame and the BB cup.

 

This had the result that when I screw the arm together,the left crank arm is rubbing against the BB, and don,t want to spin.

 

My previous Shimano BB (68/70) fits the frame perfectly, but is in fact 1mm shorter than the FSA BB.

 

So, if I use the FSA crank with the Shimano BB, there will be a play of 1mm on the crank axle. This means that you will be able to shift / pull the crank left and right for 1 mm inside the BB.

 

In short :

Shimano BB fits my frame, but has play on the crank.

 

FSA BB fits the crank, but 1mm to long for my frame.

 

Can I use a shimano BB and put in a nylon washer between the BB and the crank arm (Left side) to clear the 1mm play?

 

According to the guy at our LBS, you don't get 1mm BB spacers (only 2mm?)

 

Advice will be appreciated.

[DMC007]

Maybe this will help...

 

https://community.bikehub.co.za/topic/78681-fsa-bb-problem/

[Mongoose!]

Maybe this will help...

 

https://community.bikehub.co.za/topic/78681-fsa-bb-problem/

 

Thanks

[Mecnic]

How wide is your bb shell 68 or 73mm,

 

For shimano bbs

 

68mm = 2 spacers drive side 1 non drive,

73mm = 1 drive side 0 non drive side

[Tankman]

How wide is your bb shell 68 or 73mm,

 

For shimano bbs

 

68mm = 2 spacers drive side 1 non drive,

73mm = 1 drive side 0 non drive side

 

yup also what I am thinking ... is the cup with the L on the left hand side and R on the Drive side?

something doesnt sound quite right in what you described mongoose