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Absolute BLACK Premium Oval chainrings for FSA ABS (asymmetric bolt spacing) cranks like Gossamer, SL-K. This model fits 4 and 5 bolt design FSA cranks. 4&5 bolt cranks are identical except for the one hidden bolt behind the crank arm in 5 bolt design which is not needed. These are the finest FSA-compatible chainrings on the market in terms of shifting, stiffness, smoothness of pedaling, and manufacturing quality. 10/11/12spd compatible. Di2 Compatible.
How to Mount Absolute Black Oval Chainrings to FSA ABS Cranks
First, you need to remove your crank from your bike. Once removed, unscrew the 4 bolts that hold two chainrings together with a T-30 Torx key. Remove both original rings. An asymmetric bolt design will prevent mounting the rings with the wrong orientation. The bolt holes on the small chainring are recessed – so the bolt heads will sit flush with the surface of the chainring - these recesses should face you when mounting the bolts
*For Gossamer - place the big ring first on the spider, then place 4 FSA spacers, and then a small chainring. Tighten with original FSA bolts
*For SL-K- place the big ring first on the outer position of the spider, then place a small chainring on the inside of the spider. Use the FSA bolt covers and place them from the front on a big ring (they are all identical). Tighten with original FSA bolts
Tighten all four bolts with a force of about 5-7Nm. Mount your crank back to the bike. You may also need to adjust the front derailleur slightly.
Absolute Black always recommends using a new chain when fitting new chainrings.
When mounting absoluteBLACK 4 bolt chainring on 5 bolt crank, leave the hidden bolt hole empty or patch it with waterproof grease. This hole is not important hence FSA removed it with a new version of cranks.
How to Adjust Front Derailleur with Absluteblack Road Oval Chainrings
To proceed with the adjustment you will need 2mm and 5mm Allen keys.
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