Bola PRO 40R Carbon Disc Wheelset 700C – 40mm Deep, 28/30mm Wide, Tubeless, Carbon Spokes, Ceramic Hub
Bola PRO 40R Carbon Disc Wheelset 700C – 40mm Deep, 28/30mm Wide, Tubeless, Carbon Spokes, Ceramic Hub
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The Bola PRO 40R Carbon Disc Wheelset is engineered for cyclists who demand a reliable upgrade without the luxury brand price tag—delivering sub-1200g weight, 40mm rim depth, and 28/30mm external width for versatile road and gravel use. T800 UD carbon fiber, flat aero carbon spokes, and a precision ceramic hub enhance ride quality and efficiency for endurance, race training, and all-surface adventure.
Key Features & Specs
- Rim Depth: 40mm aerodynamic profile for balanced speed and control
- External Width: 28mm or 30mm for improved tire fit and all-terrain stability
- Internal Width: 21mm or 24mm—supports 28–32c tubeless tires
- Weight: 1170g (without tape/valves)—among the lightest in its segment
- Material: Toray T800 unidirectional matte carbon fiber, ISO 4210-7 certified for safety and quality
- Spokes: Flat (foil) carbon, straight-pull, 20/20 configuration, 2-cross for direct power transfer and durability
- Hub: Bola BL240, precision CNC aluminum with sealed ceramic bearings and 54T ratchet engagement
- Brake Interface: Center Lock disc only
- Axle Compatibility: 12x100mm front / 12x142mm rear thru-axle
- Tubeless Ready: Easy setup, supports modern low-pressure riding
- Warranty: 24-month limited global coverage—including defects and crash replacement
How it Compares
| Feature | Bola PRO 40R | Performance Model (e.g., DT Swiss AERO 40 II Disc) |
|---|---|---|
| Weight (pair) | 1170g | 1180g |
| Carbon Grade | Toray T800 UD | Toray T700/T800 mix |
| Rim Depth | 40mm | 40mm |
| Internal Width | 21/24mm | 23mm |
| External Width | 28/30mm | 25mm |
| Hub | Bola BL240, ceramic, 54T ratchet | DT240 EXP, steel bearings, ratchet |
| Spoke Type | Flat carbon, straight-pull, 20/20 | Sapim CX-Ray, steel, 24/24 |
| Certification | ISO 4210-7 | Not always listed |
| Tubeless Ready | Yes | Yes |
| Warranty | 24 months with crash support | 24 months, terms vary |
Recommended Use Cases
- Upgrading a stock road or gravel bike for reduced weight and improved acceleration
- Long-distance endurance rides requiring consistent power transfer and comfort
- Mixed-terrain cycling—including paved, rough, and light gravel routes
- Amateur and intermediate-level race events seeking aerodynamic gains
- Business resale by bike shops and distributors needing reliable, certified carbon wheelsets
- Gravel adventure riders needing extra lateral stability with 28–32c tubeless tires
Frequently Asked Questions
Are 40mm deep carbon disc wheels suitable for both gravel and road cycling?
Yes. The Bola PRO 40R combines 40mm aerodynamic rim depth and a robust 28/30mm external width, supporting 28c–32c tubeless tires and center lock disc brakes. This design offers balanced aero performance and lateral stability for both fast road rides and off-road gravel adventures.
How does a 1170g carbon wheelset with ceramic bearings compare to similar options for climbing and speed?
At 1170g, the Bola PRO 40R is among the lightest in its class for a 40mm disc wheelset. Ceramic hub bearings reduce rolling resistance, while the 54T ratchet provides quicker engagement on climbs and sprints. Comparable competitor models (like DT Swiss AERO 40 II, HUNT 40) are slightly heavier and often use steel bearings.
Will the 28mm or 30mm external width fit 28c and 32c tubeless tires?
Yes, both rim options are tubeless-ready and designed to fit 28c–32c modern tires. Wider external and internal widths provide better sidewall support and improve grip and comfort on diverse surfaces.
Are flat carbon spokes more durable or responsive than steel spokes for amateur racing?
Flat carbon spokes offer improved lateral stiffness and aero efficiency versus standard steel spokes. They transmit pedaling force more directly, suiting riders seeking fast acceleration and sharp handling, though steel spokes may be easier to service or replace in remote settings.
What’s the main ride benefit of upgrading to a lightweight 40mm tubeless carbon wheelset?
Key benefits include significant weight reduction for easier climbing and acceleration, enhanced aerodynamics for sustained road speed, and improved comfort and traction through wider tubeless rims—delivering a measurable upgrade over standard aluminum or OEM wheels.
