ABSOLUTE BLACK MTB RACE FACE OVAL BOOST3 DM SH12+ CHAINRING

This particular chainring will ONLY work with CN-M9100, 8100 & 7100 Hyperglide+ 12spd chain due to different thicknesses and shapes of the teeth. Our premium 1X RaceFace Boost 148 direct mount narrow wide Oval chainrings are designed for CINCH system RaceFace uses to mount chainring directly to the crank. This version is for BOOST specific bikes and FAT BIKES (when reversed).

The difference between Boost148 and non-boost chainrings is in the offset/dish of the chainring itself only. You would use the same crank in both boost and non-boost bikes, but the chainring offset has to be different to accommodate chainstay clearance. Boost chainrings have only 3mm offset while non-boost ones 6mm.

If you wish to check for frame clearance with the new oval ring, below you can find the measurement of the biggest dimension of the oval (tip to tip of tooth):

30T: 134mm ; 32T: 143mm ; 34T: 151mm

ADVANTAGES OF OUR SPECIAL DIRECT MOUNT CHAINRINGS:

*We mastered our oval chainrings to perfection, so you can get the best possible advantage from the oval/elliptical shape.
*Finest design to provide excellent weight to strength ratio
*One of a kind special oval shape (Patent Pending)
*Greatly improves traction and climbing abilities
*Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for a minimum of 12 months!
*Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically
*They save weight because they don’t need the spider and chainring bolts.
*The ability of installation of smaller ring sizes that can’t be mounted on the regular spider.
*Superb quality and great look.
*You will ride faster using ovals. If you keep using a round ring then others will get quicker.
*You will not “feel” the oval shape at all
*Reduces stress on knees

HOW TO MOUNT RACE FACE CINCH OVAL CHAINRING:

The chainring has a mark on the backside that you need to line up with the center of the crank arm to achieve the main/recommended position. Once this is done use the BB key to lock the lockring. If you wish to try more aggressive setup, rotate the chainring from main position clockwise by one notch on the splines. This will rotate oval by further 22deg. We do not recommend the second position for beginners. Before you start experimenting with the clocking of the ring, make sure you have ridden a minimum 5 months in the main position first.

OPTIMUM CHAINRING ADJUSTMENT (OCA):

Our main/recommended clocking position is a fantastic setup for everyone. However, some more seasoned riders may like a bit more aggressive clocking position. RaceFace Oval chainring allows you to change the clocking position by 22deg both ways from the initial setup. This is the only chainring in our line offering this adjustability.

Oval (elliptical) chainring does not compromise the work of the clutch mechanism in rear derailleur(video at the bottom). It also does not require chain tensioner when using in Singlespeed application. It is the most advanced oval chainring currently on the market.

The most advanced, Patent Pending narrow/wide tooth profile on the Market guarantee minimum of 12 months of excellent chain retention capabilities! We mean it. Always use a new chain with a new chainring.