Shimano GRX FC-RX820-2 Hollowtech II Crankset - black/175.0 mm 31-48

Shimano GRX FC-RX820-2 Hollowtech II Crankset

Item number: 90401
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Shimano GRX FC-RX820-2 crankset - two chainrings for efficiency on any terrain


The Shimano GRX FC-RX820-2 is a lightweight, very efficient 2x12-speed crank for ambitious gravel rides as well as for aggressive gravel races. The set-up with two chainrings is suitable for all those who want to combine the flexibility of conventional road bike gears with off-road capability. The gear ratio has been chosen so that you can always pedal smoothly. You are fast on the flat and make good progress on climbs, no matter what the terrain is like. Even when riding in a group, you will find the right gear with the FC-RX820. The crank 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 chainrings, made of lightweight aluminium. The model has a specific bolt circle diameter of 80 and 110 mm. It produces a chainline of 47 mm and a Q-factor of 151 mm, which is a difference of about +3 mm compared to road bike cranks.

Specifications:

Application:
Gravel
Compatibility:
Shimano 2x12-speed
Chainring Mount:
110/80 mm bolt circle diameter, 4-arm asymmetrical

Technical Information:

Series:
GRX RX820
Crank Arm Material:
aluminium
Chainring Material:
aluminium
Axle Material:
steel
Gradation:
31-48 T
Crank Arm Length:
170.0 mm, 172.5 mm, 175.0 mm
Chainline:
47 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:

Shift/Brake Lever:
ST-RX820, ST-RX610, ST-R7120
Front Derailleur:
FD-RX820
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:

  • 2x12-speed aluminium crank for gravel use
  • optimised for mixed terrain and different riding styles
  • gear ratio helps to maintain a steady pedalling rhythm even on rough surfaces
  • perfect gradation also for riding in a group
  • generous 17-tooth difference between chainrings for changing conditions
  • Hollowtech II: perfect balance between stiffness, stability, weight and rotational efficiency
  • hollow crank arms (Hollowtech)
  • anodised crank arms and chainrings
  • 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 31-48:
IFCRX8202CX81
172.5 mm 31-48:
IFCRX8202DX81
175.0 mm 31-48:
IFCRX8202EX81

Contents:

  • 1 x Shimano GRX FC-RX820-2 crankset (31-48 tooth)
  • 1 x Shimano crank bolts


Weight:

  • black/170.0 mm 31-48: 710 g
  • 100 day return period
  • Online since 1998

Models:

  • black/170.0 mm 31-48, out of stock – back in stock soon
    147.13€
  • black/172.5 mm 31-48, in stock
    147.13€
  • black/175.0 mm 31-48, in stock
    147.13€

Customer Reviews (1)

5

Customer Reviews (1)

5.0/5.0
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by JAIRO M. on 24.06.2024
verified purchase
item: black/170.0 mm 31-48

Calidad Shimano, bielas gravel muy recomendables y al mejor precio

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