Chainrings in un-approved combinations
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Chainrings in un-approved combinations
On the off-chance that somebody else out-there is thinking of trying alternative chainring combos on an FSA crankset...
My CX bike came with an FSA Energy Compact crankset with 36/46T chainrings. The only other "approved" combination for this crankset is 34/50T, but I thought I'd like to run with 34/46T. Not an earth-shattering change, but helpful for climbing long Alpine passes.
Swapping the rings is easy and doesn't entail removing the cranks, and doesn't seem to have any negative effect on the gear-shifting. The only hiccup is that the chain rubs when on the 34T and the smaller sprockets:
I thought this was odd for such a modest alteration, but comparing the 34T and 36T rings the reason is clear. The new 34T ring has a milled area around the fixing bolts, moving it 0.6mm outwards and closer to the large chainring:
So the fix is easy: just add five 0.6mm thick spacing washers between the spider and the chainring.
My CX bike came with an FSA Energy Compact crankset with 36/46T chainrings. The only other "approved" combination for this crankset is 34/50T, but I thought I'd like to run with 34/46T. Not an earth-shattering change, but helpful for climbing long Alpine passes.
Swapping the rings is easy and doesn't entail removing the cranks, and doesn't seem to have any negative effect on the gear-shifting. The only hiccup is that the chain rubs when on the 34T and the smaller sprockets:
I thought this was odd for such a modest alteration, but comparing the 34T and 36T rings the reason is clear. The new 34T ring has a milled area around the fixing bolts, moving it 0.6mm outwards and closer to the large chainring:
So the fix is easy: just add five 0.6mm thick spacing washers between the spider and the chainring.
#2
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Looks like a milling modification for the (too many cogs) 10 and 11 speed narrow chains,
to keep from dropping the chain between the 2 chainrings,
You could have just flipped the chainring over and used that as the inside face,
or bought a chainring from another company , not FSA,
that was not milled down to work with 10~11 speed chains. too ..
to keep from dropping the chain between the 2 chainrings,
You could have just flipped the chainring over and used that as the inside face,
or bought a chainring from another company , not FSA,
that was not milled down to work with 10~11 speed chains. too ..
#3
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You could have just flipped the chainring over and used that as the inside face,
or bought a chainring from another company , not FSA, that was not milled down to work with 10~11 speed chains. too ..
I wasn't too surprised that a non-recommended chainring caused problems, but was happy to discover that the incompatibility was so easily solved.
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