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Shimano GRX FC-RX610-2 (46/30T)
  • Shimano GRX FC-RX610-2 (46/30T)
  • Shimano GRX FC-RX610-2 (46/30T)
Shimano GRX FC-RX610-2 (46/30T)

Shimano GRX FC-RX610-2 (46/30T)

$235.00 CAD
Length

Gravel-Tuned Gearing. Expanded Tire Clearance.

The engineering highlight of the Shimano GRX FC-RX610-2 is its +2.5mm outboard chainline design. By shifting the chainrings slightly outward compared to traditional road cranks, Shimano opens up vital frame clearance for high-volume gravel tires and mud shedding. Paired with an optimized 46/30T sub-compact chainring combination, it provides a low-ratio 1:1 climbing option when paired with modern 12Speed wide-range cassettes.

Why the GRX FC-RX610-2 Belongs on Your Gravel Build:

  • Gravel-Optimized 46/30T Chainrings: Sub-compact chainring ratio offers an ultra-low climbing gear for steep, loose ascents while keeping enough top-end speed for fast group pavement sections.

  • +2.5mm Outboard Chainline: Moves the chainline to 47.0mm, increasing frame clearance for wide, aggressive gravel tires (up to 700x45c+) and preventing thick mud buildup.

  • Tight 16T Step Gap: Smaller teeth differential between outer and inner rings means smoother, less disruptive front shifts with minimal cadence drop.

  • Hollowtech II 24mm Axle: Utilizes Shimano’s benchmark 24mm spindle system for exceptional stiffness, low rotating weight, and universal bottom bracket serviceability.

  • Durable Anodized Finish: High-strength aluminum crank arms and steel-reinforced chainrings resist pedal strikes, shoe rub, and grit abrasion.

Technical Specifications:

  • Series: Shimano GRX RX610 Series

  • Drivetrain Speed: 2x12Speed

  • Chainring Combination: 46/30T

  • Chainline: 47.0mm (+2.5mm vs. standard road)

  • Q-Factor: 151mm

  • Spindle Diameter: 24mm (Hollowtech II)

  • PCD / BCD: 110/80mm Asymmetric 4-Bolt

  • Weight: ~815 grams

 

The Alegro Perspective: The FC-RX610-2 is our go-to crankset recommendation for riders building up an accessible, ultra-reliable 2x12 gravel rig. A 46/30T combo combined with a 12Speed rear cassette gives you the ultimate bail-out gears for heavily loaded bikepacking bags or steep 15% gravel climbs. Plus, the standard 24mm spindle fits almost every bottom bracket standard on the market without annoying squeaks or proprietary adapters.

Optimal Cadence Control. Maximum Tire Clearance. Master Modern Gravel with Shimano.

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