An FSA 42T 1x chainring for FSA Gossamer (2021 on) cranks, 120mm BCD, 4-bolt, 10/11-speed.

Highlights

  • Teeth: 42T
  • Mount / BCD: 120mm BCD, 4-bolt
  • Speed: 10/11-speed
  • Fits: FSA Gossamer (2021 on) cranks

Details

FSA's 1x rings use the Megatooth thick-thin tooth profile to hold the chain without a front derailleur. The ring bolts to the crank's spider, so the bolt circle diameter (BCD) and bolt count have to match.

Fit and compatibility

It fits FSA Gossamer (2021 on) cranks. Check your crank's spider is 120mm BCD, 4-bolt before ordering. It's set up for 10/11-speed chains. 42T is a common 1x gravel and road size that balances top speed and climbing.

Fitting

Swap chainrings with the right tool and torque the bolts or lockring to the figure FSA gives for your crank. A new ring is also a good time to check chain wear, because a worn chain will skip on fresh teeth.

Check your crank model and chain speed against the details above, or ask us and we'll confirm the fit.

FSA warrants its products against defects in materials and workmanship for two years from the original purchase, for the original purchaser. FSA lists this as a wear part, so it's covered for manufacturing defects only, not normal wear.

For a warranty claim, return the item to Tune Cycles with your proof of purchase and we'll manage the claim for you. FSA products come with guarantees that can't be excluded under the Australian Consumer Law, and this cover is in addition to those rights.

  • Teeth: 42T
  • Mount / BCD: 120mm BCD, 4-bolt
  • Speed: 10/11-speed
  • Fits: FSA Gossamer (2021 on) cranks
Teeth42T
Mount / BCD120mm BCD, 4-bolt
Speed10/11-speed
FitsFSA Gossamer (2021 on) cranks
SKU BPW-FSA-0208
Model # FSA-0208
Brand FSA