SHIMANO | SHIMANO GRX FC RX820 12Speed Crankset 165 170MM Crankarm 42T Crown Bicycle Road Crank 1*12 Speed for GRAVEL Bike Bicycle Parts

Note:If you choose the option "Without BB"，it means that the products you buy are not include the bottom braket.Please check carefully before purchasing!Shimano GRX FC-RX820-1 crankset 1x12The Shimano GRX FC-RX820-1 crank offers you optimal performance for changing surfaces and driving styles. Thanks to tighter gears, you can maintain your pedaling rhythm on familiar terrain. A chain line 2.5 mm outside ensures compatibility with wider tires. The single chainring is characterized by the Shimano Dynamic Chain Engagement technology, so that you do not have to fear chain drops. Of course, the FC-RX820-1 crankset is based on the tried and tested Hollowtech II system.Series: GRX RX820Use: Gravel, Cyclocross, Touring / TrekkingGradation: 40 teeth, 42 teethCrank arm length: 170.0 mm, 172.5 mmChain line: 49.7 mmQ factor: 151 mmAxle diameter: 24 mmCompatibility: Shimano 1x12-speedChainring attachment: 110 mm bolt circle, 4-arm asymmetricalFeatures:Tighter switching steps ensure a constant rhythm on known routesOptimal switching for different surfaces and different driving stylesGreater bandwidth in the frontCompatibility:Rear derailleur: RD-RX820 (max. 45 teeth), RD-RX822 (max. 51 teeth)Cassette: CS-M8100, CS-R8101, CS-HG710Chain: CN-M9100, CN-M8100, CN-M7100, CN-M6100Bottom bracket (thread type): BB-RS501, BB-RS500, BB-R9100, SM-BB9000, SM-BBR60, SM-BB6700, SM-BB5700, SM-BB4600bottom bracket (Press Fit): BB-RS500-PB, SM-BB92-41B, SM-BB72-41B, SM-BB71-41BTech:Hollowtech IIWhat matters is the overall balance of the crankset. With regard to the entire crankset, an optimal relationship between the strength of the crank arms, the rigidity of the axle, the bearing position and other features is very important. When developing the crankset, the overall balance of all individual elements was carefully taken into account to ensure maximum stability.