Power2max (FSA Gossamer) and BB90

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rainerhq
Posts: 898
Joined: Wed Dec 15, 2010 10:32 am
Location: Estonia

by rainerhq

I want to install P2M FSA crank to BB90 equipped bike, but it´s pretty hard.
FSA crank axle outer diameter is not even. It has two areas, where its 0,3mm bigger.
I sanded area 1. with sandpaper (it took about 1 hour) and then I could enter the axle throw the bearings, but I cant sand area 2., because it is too close to spider. And the 2. area is too thick, so the right bearing does not fit over there and that´s why the axle is not extending enough from left side. And thats why the left crank cant be secured properly.
On my previous bike it was not problem, because it had BSA68. And there is somekind of plastic sleeve between axle and bearing, which can compress, but in this BB90 there is direct contact between axle and bearing (metal to metal) and there is no room, when axle is bigger than it should be.
Has anybody installed P2M FSA Gossamer successfully to their Domane?

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Tillquist
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by Tillquist

Have you measured the shaft with a micrometer screw ?

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rainerhq
Posts: 898
Joined: Wed Dec 15, 2010 10:32 am
Location: Estonia

by rainerhq

24mm, where the bearing should sit, but Shimano crank is 23,93 - 23,97mm. And Shimano fits through the bearings.
"Nothing compares to the simple pleasure of a bike ride"

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jekyll man
Posts: 1570
Joined: Wed Apr 25, 2007 10:23 am
Location: Pack filler

by jekyll man

FSA/ Shimano not quite fitting is a well known and documented occurance.

Some fit, others don't.

FWIW unbolt the P2M spider and then sand the axle down
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rainerhq
Posts: 898
Joined: Wed Dec 15, 2010 10:32 am
Location: Estonia

by rainerhq

I took the crank axle to the turner shop and they machined a bit off. Now it sits, where it should.
"Nothing compares to the simple pleasure of a bike ride"

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