Shimano GRX FC-RX820-1 Hollowtech II Crankset

Shimano GRX FC-RX820-1 crankset - one chainring for efficiency on any terrain

The Shimano GRX FC-RX820-1 is a lightweight, very efficient 1x12-speed crank for gravel use of all kinds. The set-up with one chainring is suitable for all those who like things to be uncomplicated and are looking for an all-purpose crank for exploring, racing, high-speed section and mountain crossings. In general, this solution is affected less by dirt and mud. In combination with an appropriate cassette, the two chainring options offer you a wide range of ratios for any terrain. FC-RX820 features the proven Hollowtech II design for highly efficient power transmission and outstanding stiffness with the lowest possible weight. One reason for this is that the crank arms are hollow and, like the chainring, made of lightweight aluminium. The model has a specific bolt circle diameter of 110 mm. It produces a chainline of 49.7 mm and a Q-factor of 151 mm.

Specifications:

Application:

Gravel

Compatibility:

Shimano 1x12-speed

Chainring Mount:

110 mm bolt circle diameter, 4-arm asymmetrical

Technical Information:

Series:

GRX RX820

Crank Arm Material:

aluminium

Chainring Material:

aluminium

Axle Material:

steel

Gradation:

40 tooth, 42 tooth

Crank Arm Length:

170.0 mm, 172.5 mm, 175.0 mm

Chainline:

49.7 mm

Q-Factor:

151 mm

Axle Diameter:

24 mm

Compatible BSA Shell Width:

68 mm

Recommended Bottom Bracket:

SM-BBR60 or SM-BB72-41B Press Fit Hollowtech II (not included)

Recommended Chain:

HG 12-speed (e.g. CN-M8100)

Compatibility:

Bottom Bracket:

BB-R9100, SM-BB9000, SM-BBR60, SM-BB6700, SM-BB5700, BB-RS501, BB-RS500, SM-BB4600, SM-BB92-41B, SM-BB72-41B, SM-BB71-41B, BB-RS500-PB

Chain:

CN-M8100, CN-M9100, CN-M7100, CN-M6100

Features:

• 1x12-speed aluminium crank for gravel use
• developed for mixed terrain
• wide range of options for the optimal gravel gear ratio and different riding styles
• less susceptible to being clogged up by mud thanks to only one chainring
• Hollowtech II: perfect balance between stiffness, stability, weight and rotational efficiency
• hollow crank arms (Hollowtech)
• anodised crank arms
• chainring lacquered, anodised teeth
• aluminium chainring bolts

Technology:

Hollowtech II
Shimano Hollowtech II is a crank bottom bracket system designed to achieve an ideal ratio of stiffness, weight and rotational efficiency. It is based on an integration of the bottom bracket and the right crank arm and works with a 24 mm axle or bearing diameter, which has proven to be optimal in terms of stability. In many cases, the bearing cups are on the outside so that the load is better distributed. High-quality precision seals ensure a long service life.

Manufacturer Numbers:

170.0 mm 40 tooth:

IFCRX8201CXB0

170.0 mm 42 tooth:

IFCRX8201CXB2

172.5 mm 40 tooth:

IFCRX8201DXB0

172.5 mm 42 tooth:

IFCRX8201DXB2

175.0 mm 40 tooth:

IFCRX8201EXB0

175.0 mm 42 tooth:

IFCRX8201EXB2

Contents:

• 1 x Shimano GRX FC-RX820-1 crankset (40-tooth or 42-tooth)
• 1 x Shimano crank bolt