Gear inches

https://www.bikecalc.com/archives/gear-inches.html  

GEAR INCH CALCULATIONS

Based on: 650b X 45mm; 700c X 45mm

Leading candidates

Shimano GRX 10-speed: RX400:

• 46/30 X 11-36; Rear Derailleur RD-RX400 total capacity: 41; 

• 650b: 22 to 111 gear inches

SRAM Mullet (12 speed 1x): Mountain bike rear and road bike front: Eagle cassette and derailleur + Road crank and eTap AXS shifters (electronic): 

• 40 x 10-52 

• 650b: 20.4 to 106 gear inches

The Ideal Tour Divide Drivetrain? Ultra-Wide Range Shimano GRX 2X11. Achieve a ultra-wide range 2x11 using an 11-40 cassette with a Shimano GRX 815 or 810 derailleur.  https://www.youtube.com/watch?v=sRgLG1uP_uo 

Shimano GRX 10-speed: RX400

46/30 X 11-36; Rear Derailleur RD-RX400 total capacity: 41T

650: 22-111

700 = 23.3-111

Shimano GRX 11-speed: RX600

46/30 X 11-34

650 = 23.3-111

700 = 24.7-111

Shimano GRX 11-speed: RX800

48/31 X 11-34

650 =

700 =

SRAM Force XPLR eTap AXS - X-Range (12 Speed)

43/30 X 10-36: 

650: 22-114 gear inches

SRAM Mullet: Mountain bike rear and road bike front: Eagle cassette and derailleur + Road crank and eTap AXS shifters (electronic): 

40 x 10-52 = 20.4-106 gear inches