Stan's NoTubes Flow EX3 Rear Wheel - 27.5 12 x 148mm 6-Bolt Micro Spline Black. The Flow EX3 was designed to increase stiffness over the Flow MK3 without compromising its ride quality and ability to absorb impacts. The width of the EX3 is maintained with and increased ability of the bead to resist pinch flats even without a tire insert.

Rim Durability - rim has internal reinforcements and thicker walls vs. the Flow MK3 and is built to take more abuse

Hub Durability - steel axle triple freehub bearings and reliable engagement

Ease of tubeless setup - Stan’s “Bead Socket Technology” sets up easily with a floor pump

Includes tubeless tape and presta valves