Bola PRM 40G Carbon Gravel Disc Wheelset 700C – 40mm Depth, 36mm Wide, 1230g, Tubeless
Bola PRM 40G Carbon Gravel Disc Wheelset 700C – 40mm Depth, 36mm Wide, 1230g, Tubeless
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The Bola PRM 40G Carbon Gravel Disc Wheelset offers a 700C, 40mm-deep, 36mm-wide rim profile engineered for gravel and road cyclists prioritizing optimal performance, weight, and tire stability. Weighing 1230g per set, this reliable option suits riders seeking responsive handling, aerodynamic gains, and proven material quality for mixed-terrain riding and competitive upgrades.
Key Features & Specs
- Rim Profile: 700C, 40mm depth, 36mm external width, 30mm internal width, optimized for gravel and high-volume tires
- Material: Toray T800 matte carbon fiber (ISO 4210-7 fit), designed for lightweight strength and durability
- Spokes: 20 front/rear straight-pull blade carbon spokes, 2-cross lacing for balanced stiffness
- Hub System: CNC-machined alloy hubs, sealed bearings, disc brake compatible, thru-axle ready
- Weight: 1230g per set (excluding tubeless tape/valves), competitive in its class for improved acceleration and climbing
- Tubeless Ready: Supports tubeless setup (fits gravel tires up to 50c), increased puncture resistance and lower rolling resistance
- Max Tire Compatibility: Works with 38–50c tires, meeting ETRTO and ISO guidelines
- Warranty: 24-month manufacturer warranty, including crash replacement coverage
- Certifications: Complies with ISO 4210-7 standards for safety and performance testing
How it Compares
| Feature | Bola PRM 40G | Typical Competitor (e.g., Hunt 40/Reserve 40|44 GR) |
|---|---|---|
| Rim Depth | 40mm uniform | 40/44mm mixed or 40mm uniform |
| External/Internal Width | 36mm / 30mm | 30–36mm / 25–30mm |
| Weight (set) | 1230g | 1335–1500g |
| Spoke Type | Straight-pull blade carbon | Stainless steel or alloy blade |
| Tubeless Compatibility | Full tubeless (up to 50c) | Full tubeless (up to 50c) |
| Hub Engagement | Standard CNC hub, sealed bearings | Ratchet or star ratchet, rapid engagement (some models) |
| Warranty | 24 months + crash replacement | 24 months–Lifetime (varies) |
| Certifications | ISO 4210-7 | ISO 4210-7 or similar |
Recommended Use Cases
- Gravel racing and endurance events across mixed terrain
- All-road and rough-tarmac cycling needing extra tire support
- Upgrade for OEM alloy wheelsets to reduce weight and improve responsiveness
- B2B retail and fleet specification for cost-effective, high-performing carbon wheels
- Training and everyday riding where reliability and comfort are valued
Frequently Asked Questions
Are 40mm deep carbon gravel wheels good for both road and off-road riding?
Yes. The 40mm rim depth balances aerodynamic efficiency for paved roads with the wide 36mm profile and 30mm internal width, supporting wide tires for off-road stability. This makes the Bola PRM 40G suitable for versatile use across road, gravel, and mixed surfaces.
How does a 1230g 700C carbon wheelset compare to alloy options for gravel bikes?
At 1230g (excluding tape/valves), this carbon wheelset is significantly lighter than typical alloy alternatives (commonly 1335–1500g), offering improved acceleration, climbing response, and reduced rider fatigue on long rides.
What are the benefits of straight-pull blade carbon spokes on gravel wheelsets?
Straight-pull blade carbon spokes lower overall wheel weight and increase lateral stiffness, improving power transfer and durability during off-road impacts compared to conventional round or steel options.
Is this wheelset compatible with tubeless tires and thru-axle setups?
Yes, the Bola PRM 40G is tubeless-ready and designed for modern thru-axle disc brake systems, maximizing compatibility with contemporary gravel bike designs.
Will wider 36mm carbon rims improve tire stability and comfort on mixed terrain?
The 36mm external and 30mm internal rim profiles offer excellent support for 38–50c gravel tires, enhancing grip and comfort by allowing lower pressures without excessive tire squirm on rough surfaces.
