Reserve 40|44 GR

Fast Everywhere.

The Reserve 40|44 GR follows the same "Turbulent Aero" philosophy as Reserve’s flagship road wheels but is beefed up for the dirt. By pairing a 40mm deep front rim with a 44mm deep rear rim, Reserve has created a staggered profile that provides a significant aero advantage at high speeds while remaining remarkably stable when the wind kicks up on exposed prairie roads.

Why the 40|44 GR is the Ultimate Gravel Upgrade:

• Gravel-Specific Aerodynamics: Most aero wheels are tested with 25mm road tires. The 40|44 GR was designed specifically around 30mm to 45mm gravel tires, ensuring that the airflow remains "attached" to the rim for maximum efficiency even with knobby tread patterns.

• Semi-Hooked Rim Bed: To provide the ultimate in safety and versatility, Reserve uses a semi-hooked design. This allows you to run modern tubeless tires at low pressures for maximum traction, while still maintaining compatibility with a wide range of tire brands and pressures.

• 27.4mm Internal Width: The ultra-wide internal channel provides massive structural support for high-volume tires. This reduces "tire squirm" in corners and allows you to run lower pressures for a "magic carpet" ride over washboard sections.

• Reinforced for the Rough: While they are light enough for climbing, the GR rims feature a reinforced carbon layup at the spoke holes and a thicker rim bead to resist "snake bite" impacts from hidden rocks or potholes.

• Legendary Hub Options: Available with DT Swiss 180, 240, or 350 hubs. Whether you’re looking for the lightest racing setup or the world-renowned durability of the 350 ratchet system, your power transfer is in good hands.

• Lifetime Warranty: Like all Reserve wheels, the 40|44 GR is backed by a Lifetime Warranty and a no-fault crash replacement policy. If you case a rock on a descent, Reserve has your back.

Technical Specifications:

• Rim Depths: 40mm Front / 44mm Rear

• Internal Width: 27.4mm

• External Width: 36mm Front / 34.4mm Rear

• Weight: Approx. 1,430g (with DT 180 hubs)

• Tire Compatibility: 30mm to 50mm (Optimized for 35-42mm)

• Brake Type: Disc Only (Centerlock)

The Alegro Perspective: The 40|44 GR is the wheelset we recommend for the rider who does it all. It’s light enough for a 2,000m climbing day, aero enough to pull at the front of a fast group ride, and tough enough to handle an overnight bikepacking trip. If you want one wheelset that makes your gravel bike feel like a road bike on the pavement and a tank on the trails, this is it.

Turbulent Aero Stability. Wide-Rim Comfort. Conquer Every Surface with Reserve.

Setting these up for a big race? These wheels are the perfect match for a pair of Reserve Fillmore Tubeless Valves. We can also help you find a set of Schwalbe G One RX tires for the ultimate gravel setup!