SUNN VENTURE AIR S2 2026 Gravel Bike

The SUNN Venture Air S2 is a carbon gravel bike designed for road riding, trails, and long distances on varied surfaces. Its carbon frame and fork, SRAM Apex AXS 12-speed electronic transmission, and 45 mm Schwalbe G-One R Pro tires make up a setup suitable for both sporty rides and off-road adventures.

Frame and fork

The HM carbon frame features fully internal cable routing and an integrated tool storage compartment. The all-HM carbon fork completes this lightweight-oriented construction and helps absorb some of the vibrations encountered on rough roads and trails.

Electronic transmission and braking

The SRAM Apex AXS 12-speed electronic transmission combines a 40-tooth single chainring with an 11–44-tooth cassette. This setup offers a gear range suitable for the changes in gradient encountered on roads and trails. The SRAM Apex XPLR hydraulic brakes with 160 mm rotors at the front and rear provide stable and predictable braking on different types of surfaces.

Wheels and tires

The Mach1 Wookx 25 Tubeless wheels are paired with Schwalbe G-One R Pro 700 × 45 TLR tires. Their tubeless compatibility allows for a tubeless setup. The 45 mm width is suitable for routes alternating between asphalt, rough roads, and trails.

Cockpit and equipment

The Brute carbon cockpit features a handlebar with a 12° flare and dimensions suited to each frame size. The Brute carbon seatpost and Fizik Vento Argo X5 saddle complete the equipment. The bike also comes with a GPS mount, a tool pouch, and mudguards.

Specifications

• HM carbon frame.
• Fully internal cable routing.
• Integrated tool storage compartment.
• All-HM carbon fork.
• SRAM Apex AXS 12-speed electronic transmission.
• SRAM Apex AXS 12V rear derailleur.
• SRAM Apex XPLR AXS 12V shifters.
• SRAM Apex 1 XPLR crankset with 40-tooth chainring.
• 165 mm cranks in size S and 170 mm in sizes M, L, and XL.
• SRAM Apex XPLR PG-1231 12-speed cassette, 11–44 teeth.
• SRAM Apex XPLR hydraulic brakes with 160 mm rotors at the front and rear.
• Mach1 Wookx 25 Tubeless wheels with Brute hubs and Center Lock mounting.
• Schwalbe G-One R Pro 700 × 45 TLR tires.
• Tubeless tire setup possible.
• Brute Carbon Combo cockpit with 100 mm drop, 70 mm reach, and 12° flare.
• Cockpit dimensions: 400/70 mm in S, 420/80 mm in M/L, and 440/90 mm in XL.
• Brute carbon seatpost, 27.2 × 300 mm in S/M and 27.2 × 350 mm in L/XL.
• Fizik Vento Argo X5 saddle, 265 × 150 mm.
• Velox Maxi Cork T4 handlebar tape.
• GPS mount.
• Tool pouch.
• Mudguards.
• Sizes: S (44), M (47), L (50), XL (53).
• Weight: 9.250 kg.