Magene EXAR Pro RB58 Carbon Wheelset-58mm (Rim Brake)

Lighter Always with You
EXAR Pro series rims are made of HI-MOD carbon fiber. While keeping the rim, spoke and hub stiff, we optimized materials and structure to reduce overall weight. The light design effectively reduces driving weight and improves sprinting performance. Automatic carbon fiber winding technology is applied, therefore, the carbon fiber is prestressed and is more straight and evenly forced. The stiffness and consistency of wheelset are ensured. *The wheelset weight does not include the weight of quick-release bar and rim tape; A tolerance of ±3% applies to the weight, and the actual wheelset weight should prevail.

Flat Engagement Ratchet, Ensure Stable Performance
Adopt 36-tooth flat ratchet, which has tighter engagement with larger surface. This can make the ratchet more durable, with fast and precise engagement as well as stability. The rotating sound is more even with flat wire spring. It’s highly free that you could replace the original ratchet with other ratchet of different tooth amount.

Wider for Better Aerodynamics
Pro series wheelsets have an external width of 27mm and an internal width of 20mm. The 27mm wide rim provides a flatter aerodynamic surface with 25c and 28c outer tires and thus reducing air resistance.

Braking Rim Dewatering Line Design
The unique grooved dewatering line of the rim brake wheelsets quickly drains water and improves braking performance. The braking rim is made of resin that be resistant to high temperature up to 240, eliminating the concern of rim blowing up or melting.

UCI Approved
EXAR Pro series wheelsets have passed UCI impact tests. After applying an energy of 40 J on the bare carbon rim, the deviation complies with UCI standard.

Unique Design of Rim
To improve the wheelset stability, stiffness and crosswind resistance of different frame heights, targeted wheel rim designs were made. For the 45mm deep rim brake rear wheel, an asymmetric rim design is adopted to balance the rear wheel spoken tension. For the 58mm deep rim brake rear wheel, a symmetric structure is adopted to prevent deflection due to uneven airflow. The cross-sections of Pro series wheelsets are redesigned for greater stability and rigidity.

Elaborate Hub Structure
The rear-wheel hub WR size is increased to ensure the spoke tension on the driving side is consistent with that on the non-driving side, hence to deliver outstanding lateral stiffness. Adopting FEA technology and conducting several tests to identify the maximum force on the hub, to get a light and sturdy hub. To obtain a better balance lateral stiffness, driving stiffness and braking effect, the front and rear spokes of the disc brake variants have applied a 2:1 balanced lacing pattern, and the hub geometry has been adjusted accordingly. The rear-wheel drive side flange diameter is increased and the spoke direction is aligned with the torque direction and the wheelset driving efficiency is improved.

Balanced Design of Spoke Tension
For both front and rear wheels of the the disc brake wheels, the 2:1 balanced lacing pattern is applied to reasonably distribute spoke tension and enhance the pedalling force. With a standard design of highly stiff spokes, the spoke tension of all models of rear-wheel drive side is 120kgf ±10%, with vigorous and powerful treading.

More Powerful Design
The Pro series feature Pillar Wing21 flat spokes for excellent performance of aerodynamics and driving stiffness. The Pro series with a rim brake come with carbon fiber composite brake blocks, providing excellent braking effect and less debris. The self-locking spoke nipple for both internal and external use is applied, where the nipple is tighter and the spokes are not easy to loose. Support tubeless tires and clincher tires. Tubeless rim tape has been attached at the factory so that tubeless tires can be installed directly.

Specifications:

• Product Name: EXAR Pro Series 2025 Carbon Wheels
• Model: Pro RB58
• Brake Type: Rim Brake
• Rim Height: 58mm
• External Rim Width: 27mm (Front) / 26mm (Rear)
• Internal Rim Width: 20mm (Front) / 19.5mm (Rear)
• Rim Material: HI-MOD Carbon Fiber
• Spoke: Pillar Wing21
• Brake: RB45 Pro and RB58 Pro are rim brakes with dewatering line design
• Front Wheel Spoke Tension: 100kgf±10%
• Rear Wheel Spoke Tension: Drive Side 120kgf±10%, Non-drive Side 100kgf±10%
• Front Wheel Spoke Lacing: Radial lacing, 16H
• Rear Wheel Spoke Lacing: 21H, 2:1, drive side×2, non-drive side radial lacing
• Ratchet: 36T (Compatible with DT System. Replaceable Ratchet with Different Tooth Amount)
• Frame Spacing: 100/130mm quick release
• Freehub Standard: Shimano 11-speed (Campagnolo N3W and Sram XDR Freehubs are available separately)
• Compatible Cassette: SHIMANO 8-12 speed, SRAM 8-12 speed (Available separately for XDR cassette body for 12-speed), Campagnolo 8-13s (require separate N3W freehub)
• Compatible Tire Type: Clincher Tire, Tubeless Tire
• Maximum Tire Pressure: Clincher tire: 110psi for 28c, 100psi for 30c, 90psi for 32c // Tubeless tire: 100psi for 28c, 90psi for 30c, 80psi for 32c // Clincher tire 120psi for 25cTubeless tire 110psi for 25c
• Compatible Tire Width: Compatible with 25c Tire and Above, Suggested Tire Width is 28c – 32c
• Weight: 1425gm
• Warranty: 2 years

In the box:

• Carbon fiber front wheel x1
• Carbon fiber rear wheel x1
• Tubeless Rimtape x2 (factory-installed)
• Tubeless Valve x2
• Quick Release x2
• Special carbon fiber brake block x4
• User manual x1