Shimano GRX CRANKSET 1X12s RX820

Crankset

GRX CRANKSET 1X12s RX820

Specifications

Manufacturer
Shimano
Name
GRX CRANKSET 1X12s RX820
Series
RX820
MPN
FC-RX820-1
Groupset
GRX
Rear Speeds
12
Front Speeds (chainrings)
1[1]
Drivetrain Brand
Shimano
Chainring Sizes
40, 42, 44, 46[2]
Crank Length (mm)
160, 165, 170, 172.5, 175
Spindle Interface
24mm
Chainring Mount
4-bolt Asymmetric 110bcd[2]
BCD
110
Chainline (mm)
49.7[2]
Compatible Chain Standards
Shimano HG+ (Hyperglide+, 12s)[2]
Sources
  1. [1] AI-extracted, not yet checked against a named source (added 9 Feb 2026): Front Speeds (chainrings)
  2. [2] productinfo.shimano.com, checked 7 Aug 2026: Chainring Sizes, Chainring Mount, Chainline (mm), Compatible Chain Standards

Compatibility

Shimano GRX CRANKSET 1X12s RX820 is a Shimano crankset. It is a 12-speed component. Everything listed below was matched on a specification we hold for both parts: the interface each pairing actually depends on, such as freehub body, speed count, actuation or mounting standard. Where we could not verify that interface, the part is left out rather than assumed to fit.

Chainrings that fit this crankset20

Chainring 40T for FC-RX820-1Recommended

Shimano

Chainring 40T for FC-RX820-1

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 42T for FC-RX820-1Recommended

Shimano

Chainring 42T for FC-RX820-1

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 48T for FC-RX820-2Recommended

Shimano

Chainring 48T for FC-RX820-2

  • Both use the 4-bolt asymmetric 110bcd interface
1x megatooth alloyMechanically compatible

FSA

1x megatooth alloy

  • Both are 110mm BCD
2x chainringMechanically compatible

FSA

2x chainring

  • Both are 110mm BCD
Chainring 30T for FC-U6000-2Mechanically compatible

Shimano

Chainring 30T for FC-U6000-2

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 32T for FC-U6010-2Mechanically compatible

Shimano

Chainring 32T for FC-U6010-2

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 34T for FC-4700Mechanically compatible

Shimano

Chainring 34T for FC-4700

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 34T for FC-R3000Mechanically compatible

Shimano

Chainring 34T for FC-R3000

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 34T for FC-R3000(with CG)Mechanically compatible

Shimano

Chainring 34T for FC-R3000(with CG)

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 34T for FC-R7000(Black)Mechanically compatible

Shimano

Chainring 34T for FC-R7000(Black)

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 34T for FC-R7000(Silver)Mechanically compatible

Shimano

Chainring 34T for FC-R7000(Silver)

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 34T for FC-R7100Mechanically compatible

Shimano

Chainring 34T for FC-R7100

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 34T for FC-R8000Mechanically compatible

Shimano

Chainring 34T for FC-R8000

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 34T for FC-RS510Mechanically compatible

Shimano

Chainring 34T for FC-RS510

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 34T for FC-RS520Mechanically compatible

Shimano

Chainring 34T for FC-RS520

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 36T for FC-4700Mechanically compatible

Shimano

Chainring 36T for FC-4700

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 36T for FC-R7000(Black)Mechanically compatible

Shimano

Chainring 36T for FC-R7000(Black)

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 36T for FC-R7000(Silver)Mechanically compatible

Shimano

Chainring 36T for FC-R7000(Silver)

  • Both use the 4-bolt asymmetric 110bcd interface
Chainring 36T for FC-R7100Mechanically compatible

Shimano

Chainring 36T for FC-R7100

  • Both use the 4-bolt asymmetric 110bcd interface

Bottom brackets for this crankset20

386EVO ABEC-3 BB for 24mm (Shimano) CranksMechanically compatible

Wheels Manufacturing

386EVO ABEC-3 BB for 24mm (Shimano) Cranks

  • Both use a 24mm spindle
386EVO Angular Contact BB for 24mm (Shimano) CranksMechanically compatible

Wheels Manufacturing

386EVO Angular Contact BB for 24mm (Shimano) Cranks

  • Both use a 24mm spindle
878Mechanically compatible

Token

878

  • Both use a 24mm spindle
BB30 Outboard ABEC-3 BB for 24mm Cranks (Shimano)Mechanically compatible

Wheels Manufacturing

BB30 Outboard ABEC-3 BB for 24mm Cranks (Shimano)

  • Both use a 24mm spindle
BB30 Outboard Angular Contact BB for 24mm Cranks (Shimano)Mechanically compatible

Wheels Manufacturing

BB30 Outboard Angular Contact BB for 24mm Cranks (Shimano)

  • Both use a 24mm spindle
BB30 Outboard Ceramic Hybrid BB for 24mm Cranks (Shimano)Mechanically compatible

Wheels Manufacturing

BB30 Outboard Ceramic Hybrid BB for 24mm Cranks (Shimano)

  • Both use a 24mm spindle
BB30 Outboard ZERØ Ceramic BB for 24mm Cranks (Shimano)Mechanically compatible

Wheels Manufacturing

BB30 Outboard ZERØ Ceramic BB for 24mm Cranks (Shimano)

  • Both use a 24mm spindle
BB30ARMechanically compatible

Token

BB30AR

  • Both use a 24mm spindle
BB3724Mechanically compatible

Token

BB3724

  • Both use a 24mm spindle
BB38624PSMechanically compatible

Token

BB38624PS

  • Both use a 24mm spindle
BB386PSMechanically compatible

Token

BB386PS

  • Both use a 24mm spindle
BB4124PSMechanically compatible

Token

BB4124PS

  • Both use a 24mm spindle
BB46BR24Mechanically compatible

Token

BB46BR24

  • Both use a 24mm spindle
BB47R24Mechanically compatible

Token

BB47R24

  • Both use a 24mm spindle
BB47V24Mechanically compatible

Token

BB47V24

  • Both use a 24mm spindle
BB841PSMechanically compatible

Token

BB841PS

  • Both use a 24mm spindle
BB841T-41Mechanically compatible

Token

BB841T-41

  • Both use a 24mm spindle
BB841T-42Mechanically compatible

Token

BB841T-42

  • Both use a 24mm spindle
BB841T-46Mechanically compatible

Token

BB841T-46

  • Both use a 24mm spindle
BB86 Bottom Bracket (Shimano 24mm)Mechanically compatible

Cybrei

BB86 Bottom Bracket (Shimano 24mm)

  • Both use a 24mm spindle

Frequently Asked Questions

What fits Shimano GRX CRANKSET 1X12s RX820?

On this page we list chainrings that fit this crankset, bottom brackets for this crankset, chains for this crankset. Each listing was matched on a specification we hold for both parts; anything we could not verify is omitted rather than assumed to fit.

Can I use a higher or lower speed chain with Shimano GRX CRANKSET 1X12s RX820?

No. Shimano GRX CRANKSET 1X12s RX820 is a 12-speed component and needs a 12-speed chain. Chains for different speed counts have different external widths and inner-plate profiles, which causes poor shifting or interference with the neighbouring sprockets.