Crank Brothers Synthesis Alloy 2.0 DH Boost I9 Black Rear Wheel - Rear - 27.5 Inch - 12x148mm Boost - Aluminium - 29.5mm - 6 Bolt - Shimano HG Splined Ignore Retail Brand Rule Sidewall support – the insert

Sidewall support – the insert sits between the rim beads but allows the tyre to roll when needed

Ultra-lightweight EVA foam on the support’s underside for comfort and positioning and to distribute the impact force over the widest possible area

Let's call it a semi-slick

benefiting from features like internal organization and intuitive hydration sleeve access

Crank Brothers Synthesis Alloy 2.0 DH Boost I9 Black Rear Wheel - Rear - 27.5 Inch - 12x148mm Boost - Aluminium - 29.5mm - 6 Bolt - Shimano HG Splined Ignore Retail Brand Rule Sidewall support – the insertThe Crankbrothers Synthesis DH Alloy 2. 0 wheels are purpose built for downhill racing and riding, offering a tuned system for ultimate performance on the most demanding trails. The compliant front wheel enhances grip and control through rocks, roots, and technical features, while the stiff rear wheel provides the stability and durability needed to handle high speed impacts and aggressive cornering. Reinforced rims, spokes, and a DH specific profile