Magene EXAR DB508 Ultra Wheelset HG (2025)

The Magene EXAR DB508 Ultra Wheelset HG (2025) is built for riders who want a lighter, stiffer and more aerodynamic carbon wheel upgrade for modern disc brake road bikes, with stable handling when wind conditions get unpredictable. Using Magene’s integrated “Ultra” system approach—HI‑MOD T800 carbon rims, HI‑MOD T800 carbon spokes, and ceramic bearings—the DB508 targets quick acceleration, efficient power transfer, and consistent performance across training rides and race‑pace efforts.

A key design choice is the lower front / higher rear rim profile (50 mm front and 58 mm rear). This pairing is intended to keep the front wheel more controllable while the rear wheel maintains higher inertia for speed retention—useful for bunch rides, rolling terrain, and high‑speed riding where crosswinds and frequent surges are common on Brisbane and Queensland roads.

Integrated aero rim design for modern tyre widths

The DB508 uses a 30 mm external rim width and 23 mm internal width, a modern combination intended to suit disc‑brake road geometry and wider tyres. With 28–32c tyres (the suggested range), the tyre and rim interface becomes flatter, which improves comfort and helps maintain stable airflow. The rim is hooked, giving you flexibility to run tubeless for puncture resilience and lower pressures, or clincher with tubes for simplicity.

Full carbon spokes and balanced lacing for stiffness

Magene specifies HI‑MOD T800 carbon fibre spokes, with a claimed per‑spoke weight of 2.8 g, and a 2:1 balanced lacing pattern to improve load distribution and drive‑side stiffness. The provided tension targets are 110 kgf ±10% at the front and 130 kgf ±10% (drive side) / 110 kgf ±10% (non‑drive side) at the rear, supporting a responsive feel when sprinting, climbing out of the saddle, or accelerating repeatedly.

Ceramic bearings and fast hub engagement

For smoother rolling efficiency, the DB508 Ultra uses ceramic bearings, designed to reduce resistance and improve long‑term durability versus standard steel bearings. The hub system uses a 36‑tooth flat ratchet for quick engagement and stability, with a 54T upgrade option noted as available separately for riders who prefer even faster pickup.

Shimano HG freehub installed, with optional swaps

This version ships with a Shimano HG 11‑speed freehub installed, making it a direct upgrade for many Shimano road drivetrains. If you run a different drivetrain standard, SRAM XDR and Campagnolo N3W freehub bodies are available separately.

Testing note (as provided)

The product description states the wheelset has passed an impact test described as applying 40J energy to a bare carbon rim with deviation complying with UCI standards. If you require formal certification documentation or model listing, this should be verified via manufacturer/distributor paperwork.

Specifications (Quick Reference)

• Brake: Disc only
• Rim height: 50 mm front / 58 mm rear
• Wheelset weight: 1375 g ±3%
• Max rider + bike system weight: 110 kg
• External rim width: 30 mm
• Internal rim width: 23 mm
• Rim material: HI‑MOD T800 carbon fibre
• Bearings: Ceramic
• Spokes: HI‑MOD T800 carbon fibre (2:1 lacing)
  • Front tension: 110 kgf ±10%
  • Rear tension: drive side 130 kgf ±10%, non‑drive side 110 kgf ±10%
• Ratchet: 36T (54T option available separately)
• Axle: 12×100 front / 12×142 rear thru‑axle
• Freehub supplied: Shimano HG 11‑speed installed
  • Optional freehubs: SRAM XDR, Campagnolo N3W (sold separately)
• Tyre compatibility: 25c and above (suggested 28–32c)
• Rim type: Hooked, clincher + tubeless compatible