The Shimano Deore WH-MT620 is a trail-ready 27.5" rear wheel built for modern 12-speed mountain bike drivetrains. Designed around Boost spacing and Shimano's Micro Spline freehub standard, it delivers confident tyre support and predictable braking for cross-country and trail riders who demand reliability without the premium-tier price tag.

Highlights

• Wide 30mm internal rim: Supports tyre widths from 2.25" to 2.6", giving your tyre a better profile and more predictable cornering feel on trail.
• Tubeless ready: Hooked rim design is fully tubeless compatible — run lower pressures for improved traction and puncture resistance.
• Micro Spline freehub: Compatible with Shimano 12-speed cassettes using the Micro Spline driver, including 10-51T wide-range options.
• Boost 148x12mm thru-axle: Boost rear spacing maximises wheel stiffness and chainline clearance for modern trail geometry frames.
• Centerlock disc mount: Works with Shimano Centerlock rotors for consistent, easy-to-service braking.
• 24 J-bend spokes: Durable J-bend lacing at 24 spokes balances weight, stiffness, and serviceability.

Construction & Design

The WH-MT620 rim measures 30mm internal and 34.7mm external width with a 19.8mm rim height, keeping the wheel light and stiff enough for aggressive trail use. Twenty-four J-bend spokes connect the hub to the rim, offering a construction that's easy to true and rebuild if needed. At 1,206g the rear wheel sits solidly in the trail-performance bracket without the weight penalty of heavier budget options.

Compatibility & Fit

Rear axle: 12mm E-THRU (Boost), O.L.D. 148mm. Freehub: Shimano Micro Spline — compatible with Shimano 12-speed cassettes. Brake mount: Centerlock disc only. Wheel size: 27.5" (650B). Recommended tyre width: 2.25–2.6". Speed compatibility: 12-speed. Not compatible with HG (Hyperglide) cassettes — a Micro Spline cassette is required.