An ultralight direct-mount chainring for e*thirteen's XCX Boost cranks, trading a little impact strength for a big weight saving.

Highlights

  • QuickConnect direct-mount ring for e*thirteen XCX Boost cranks
  • Boost −5mm offset chainline
  • Compatible with 10/11/12-speed SRAM and Shimano drivetrains
  • M3 tooth profile for chain retention
  • 7050 aluminium, 79g

Tooth count

40T.

Compatibility & fit

Fits e*thirteen XCX Race MTB cranks with a Boost chainline, via the QuickConnect direct mount. Works with 10/11/12-speed SRAM and Shimano drivetrains.

e*thirteen covers this part with a 10-year warranty against manufacturing and material defects (crash or impact damage qualifies for a discounted replacement), per ethirteen.com. This is in addition to your rights under the Australian Consumer Law, so keep your proof of purchase. For warranty support, return the product to Tune Cycles and we'll manage the claim with e*thirteen's Australian distributor.
  • QuickConnect direct mount, Boost -5mm offset
  • 40T, M3 tooth profile
  • Fits 10/11/12-speed SRAM and Shimano
  • 7050 aluminium, 79g
Teeth40T
MountQuickConnect direct mount
ChainlineBoost (−5mm offset)
Speeds10 / 11 / 12
Material7050 aluminium
Weight79g
ColourBlack
Brand part numberCR3UNA-111
SKU DTW-ETG-CRDMBST40UL
Barcode # 4710751505216
Brand e*Thirteen
Shipping Weight 0.2000kg