Shimano GRX FC-RX610 1×12-speed Crank 38

For your riding freedom: the Gravel GRX 1×12-speed FC-RX610-1 Crank 38T from Shimano

Finally, for more budget conscious consumers and to allow a wider price range on complete gravel bikes, Shimano has updated its 600-series cranks and shift levers for 1×12 and 2×12 setups that utilize trickle-down technology from the original 800 series GRX component line.

Top features include textured hoods and anti-slip brake lever coating that bolsters control on rugged terrain. The new cranksets offer gearing options that specifically cater to the demands of gravel riding. The 2×12 crank is spec’d with a 46/30 chainring and is available in 165, 170, 172.5, and 175mm crank arm lengths. The RX610 1×12 crank has the same four crank length options and is available with highly durable 38T (a new option) and 40T chainrings to pair with a 10-45 or 10-51 cassette.

Both 1×12 options utilize Micro Spline, Shimano’s lightweight aluminum freehub design that seamlessly integrates with 10-tooth top gears and features smaller, more widely spaced splines that limit cog damage. The 1×12 gravel-specific crankset is offered in three crankarm lengths, giving you the option to choose the ideal Shimano GRX setup for your needs and riding style.

Features – Shimano GRX FC-RX610-1-12 | 1×12-speed Crank | 38

• Gravel gear ratios preserve riding rhythm over rough surfaces with wider tires
• Optimum gearing for mixed terrains and riding styles
• 10-45T and 10-51T cassette options serve array of riding styles

Product features

• Use: Gravel, Cyclocross
• Group: GRX
• Model: FC-RX610-1
• Gradation: 38T
• Q-Factor: 151mm
• Threaded BB shell width: 68 / 70mm
• Gear front: 1-speed 
• Gear rear: 12-speed
• Construction: 2-PIECE
• Compatible Chain: 12-speed HG
• PCD: 110mm
• Chain line: 49.7mm
• Recommended BB Pressfit: SM-BB72
• Recommended BB BSA: SM-BBR60

Crank arm length (choose variant)

• 165mm
• 170mm
• 172.5mm
• 175mm

Material

• Crank arm: Aluminum Anodized
• Crank axle: Steel Plated
• Chainring: Aluminum Anodized

Color

• Series color

Scope of delivery

• 1 x Shimano GRX 1×12-speed Crankset FC-RX610 38T

Bottom Bracket BSM-BBR60 BSA / Pressfit SM-BB72 not included!

Shimano GRX 12-speed