Discover Bpart components at Escapa to customize your bike and equip it with the best. The Bpart Shimano 12-speed Boost 3mm Offset Oval Chainring, with its specially shaped tooth profile, ensures greater contact with the chain and smoother pedaling. By increasing the tooth height, we improve chain retention even when jerks and rattling occur.
FEATURES
The variable thickness of our teeth (wide-narrow) prevents potential chain drops
Our specially shaped tooth profile ensures greater contact with the chain and a smoother ride
By increasing the tooth height, we improve chain retention even when jarring and rattling occur.
The vents on the back of the tooth prevent mud buildup and unnecessary wear.
We reduce the bike’s weight by 150 to 350 grams by eliminating the front derailleur.
A chain guide is not necessary unless you’re a very aggressive rider; in that case, check out our Trail Up chain guide.
NARROW/WIDE DESIGN
While riding, the movement and vibration of the chain cause it to shift from side to side, making it easy for the chain to come off. Bpart Components’ narrow/wide chainrings limit this lateral movement and reduce the chance of the chain coming off during your most extreme rides.
TOOTH PROFILE
The precise tooth profile design on Bpart chainrings provides the chain with maximum contact with the chainring in all riding conditions, offering unmatched smoothness and precision in chain movement.
TOOTH HEIGHT
When we combine a well-designed profile with a carefully chosen tooth height, we get a winning combination:
Looking at the graph, we can clearly see the mechanical difference between a low profile (A) and a high profile (B); the chain will come off more easily on a drivetrain with “low” teeth than with “high” teeth, as found on Bpart chainrings.
MUD CLEARANCE
We observed in a narrow-wide design that the tighter the chain fits against the chainring, the better the drivetrain performance; however, there is a trade-off when riding in mud: the space between the chain and the chainring is very small, which promotes mud buildup since it cannot be easily removed, and as a result, the chain may come off if it does not seat properly.
At Bpart, we’ve focused on maximizing the space between the chain and the mud-shedding bevel, eliminating unnecessary recesses that encouraged the buildup of dust and mud.
Size: 28T-30T-32T-34T
Weight: 53g to 77g
Thickness: 4 mm
3 mm Offset
Material: Al 7075 T6
Machining: 100% CNC
Crank compatibility: XTR M9100, M9120, M9125, M9130, XT M8100, M8120, M8130, SLX M7100, M7120, M7130, Deore M6100, M6120, M6130 & FC-MT900
Shimano 12-speed Hyperglide+ chain only
Boost 148
