Crank Brothers

Synthesis V2 Alloy Enduro i9 Boost Wheel - 29in

What Our Gearhead® Experts Are Saying:

"I9 1/1 hubs are some of the best bang-for-buck hubs out there, and paired with the Synthesis Alloy 2.0 rims, you get a wheelset that’s stiff, compliant, and durable in all the right places. I love how predictable they feel at speed and how quickly the 4° engagement kicks in on punchy climbs."

The Synthesis Alloy 2.0 29in Enduro Wheel with i9 hubs is built to balance strength, compliance, and responsiveness for aggressive trail and enduro riders. The concept is simple but effective—tune each wheel individually to match its role. A compliant 28-spoke front wheel with a wider 31mm internal width improves front-end grip and control, while the 32-spoke, 29.5mm rear wheel boosts lateral stiffness and durability where it counts.

Engineered from 6069 aluminum and shot-peened for enhanced strength, these rims provide up to 204% better fatigue resistance compared to previous models. Reinforced sidewalls and thickened rim profiles reduce the chance of pinch flats and deformation under heavy impacts. The result is a wheelset that confidently absorbs trail punishment without compromising precision or feel.

At the core of each wheel is the Industry Nine 1/1 hub system delivering reliable 4° engagement through a six-pawl dual-phase mechanism. With Boost spacing and compatibility across different drivers, the Synthesis Alloy 2.0 with i9 hubs offers a future-proof fit for most modern enduro bikes. Whether racing, training, or simply pushing limits, these wheels hit that sweet spot between premium performance and long-term durability.