FSA Megaevo BB and Gossamer Pro crankset
10-18-18, 08:06 AM
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FSA Megaevo BB and Gossamer Pro crankset
Started an R7000 update to a 2001 bike with 9/10spd triple converting to 48/32 subcompact.
Since Shimano does not make such, I opted for the FSA Gossamer with Megaevo 30mm BB.
I discover that the Gossamer spindle won't slide into the BB bearing. Measuring I find the spindle
is 30.0mm OD and the 6806 RS2 bearing in the BB is 29.96mm ID. All my experience is with
Shimano 24mm spindles which slide right through the BB bearings whether threaded BB or press fit.
So I sent the BB back for replacement (expected next week).
Meantime I read on the BBInfinite BB site for BBA30: "installation of the crank spindle into the BB is facilitated by
putting the crank into the freezer for a half hour, then greasing and sliding in. A hammer is only needed for removal"
So the question for the mechs and FSA users is does this apply to 30mm spindles in general?
My reading of FSA lit and videos suggests the slide fit scenario, no mention of presses, hammers or cold shrink fit.
I sent an email to FSA, but crickets so far. Prior experience with Gossamer and the FSA CF cranks with 24mm spindles
on the tandem was slip fit for both sets of cranks.
What say ye?
Since Shimano does not make such, I opted for the FSA Gossamer with Megaevo 30mm BB.
I discover that the Gossamer spindle won't slide into the BB bearing. Measuring I find the spindle
is 30.0mm OD and the 6806 RS2 bearing in the BB is 29.96mm ID. All my experience is with
Shimano 24mm spindles which slide right through the BB bearings whether threaded BB or press fit.
So I sent the BB back for replacement (expected next week).
Meantime I read on the BBInfinite BB site for BBA30: "installation of the crank spindle into the BB is facilitated by
putting the crank into the freezer for a half hour, then greasing and sliding in. A hammer is only needed for removal"
So the question for the mechs and FSA users is does this apply to 30mm spindles in general?
My reading of FSA lit and videos suggests the slide fit scenario, no mention of presses, hammers or cold shrink fit.
I sent an email to FSA, but crickets so far. Prior experience with Gossamer and the FSA CF cranks with 24mm spindles
on the tandem was slip fit for both sets of cranks.
What say ye?
Last edited by sch; 10-18-18 at 08:17 AM.
10-18-18, 08:18 AM
#2
Non omnino gravis
No experience with 30mm FSA cranks, but I have to install/remove my MegaEXO FSA crank with a rubber mallet. It is very snug compared to Shimano, which is pretty much "push out with one finger."
My Rotor 3D+ crank is tight in the bearings. The freezer thing might indeed work-- you are talking about a variance of 0.0015". There are a whole lot of parts that aren't even manufactured to that tolerance.
My Rotor 3D+ crank is tight in the bearings. The freezer thing might indeed work-- you are talking about a variance of 0.0015". There are a whole lot of parts that aren't even manufactured to that tolerance.
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10-18-18, 08:27 AM
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My MegaEVO FSA SL-K 46/30 adventure crank BB386....it needs a few firm slaps with the palm of my hand to go into the bearings. They fit snug. Helps keeps grime from migrating into the shell.
10-26-18, 02:28 PM
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Replacement Megaevo BB also undersized bearing, so tried the BBInfinite suggestion of putting crank in freezer for a few hours
and lo! It slides in with a smart slap. Of course that means removal at some future time will require a 3/4" dowel and hammer to drive
the spindle out of the BB, but that should be years away.
Would have preferred Shimano but they don't seem to make 48/32 cranks.
and lo! It slides in with a smart slap. Of course that means removal at some future time will require a 3/4" dowel and hammer to drive
the spindle out of the BB, but that should be years away.
Would have preferred Shimano but they don't seem to make 48/32 cranks.
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