EXAR Carbon Fiber GR45 Pro Gravel Wheelset

EXAR carbon wheelsets are not combinations of separate parts and subassemblies, but integrated, high-quality, high-performance products that form a unified system in look, weight and performance.

The GR45 Pro rim is made from HI-MOD carbon. While maintaining the stiffness of the rim, spokes and hubs, material use and structure have been optimised to achieve the lowest possible weight. The lightweight design effectively reduces the mass moved while pedalling and improves sprint performance.

• Wheelset weight excludes the quick-release axle and rim tape. A ±3% weight deviation is possible; the actual wheelset weight always prevails.

Compared with lower-profile wheels, the 45 mm rim depth reduces frontal drag, providing a significant aerodynamic advantage. It also strikes the perfect balance between torsional and lateral stiffness, ensuring uncompromising power transfer even under high torque.

Combining excellent aerodynamics with uncompromising stiffness, the GR45 Pro delivers outstanding performance on any terrain.

Designed for gravel bikes, the wide rim with 32 mm outer and 25 mm inner width provides excellent aerodynamic performance and greater stability even in turbulent crosswinds.

Used with 35C or wider tyres, the wider rim gives the tyre better support and reduces its deformation, improving cornering grip and steering precision. It also allows lower tyre pressures, which significantly increases comfort on rough terrain by absorbing vibrations more effectively.

This scientifically optimised combination strikes the perfect balance between tyre stability, handling, ride comfort and aerodynamic efficiency.

Compatible with both tubeless and clincher tyres. The rims have no spoke holes and are tubeless-ready, so no rim tape is needed.

Front hub: Uses 24-hole, 1:1 spoke lacing with crossed spokes on both sides for greater durability. This design loads more spokes under braking, providing greater stability and more even force distribution. It effectively disperses impact forces on rough terrain and enables more consistent braking performance.

Optimised flange spacing: The wider flange spacing of the front hub provides better spoke angles and more even spoke tension, maximising lateral stiffness and wheel support.

Rear hub: Uses 24-hole, 2:1 spoke lacing that improves drive-side power transfer while maintaining the necessary lateral stiffness.

The 36-tooth flat ratchet provides greater engagement force, durability and stability, with a smoother, more even running sound. It can also be quickly swapped for a ratchet with a different tooth count, making it more versatile.

The GR45 Pro uses Pillar Wing20 steel spokes. Compared with carbon spokes, steel spokes offer better vibration damping, higher impact resistance and a longer lifespan on rough gravel terrain.

The GR45 Pro wheelset is UCI approved and meets the strict performance and safety requirements of professional racing. It offers lab-tested reliability that holds up on real, challenging gravel terrain.