Carbon Fiber Sporting Goods
Bola PRM 40G 700C Carbon Gravel Disc Wheelset – 40mm Deep, 36mm Wide, Carbon Blade Spokes, Tubeless Ready, 1200g
Bola PRM 40G 700C Carbon Gravel Disc Wheelset – 40mm Deep, 36mm Wide, Carbon Blade Spokes, Tubeless Ready, 1200g
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The Bola PRM 40G 700C Carbon Gravel Disc Wheelset combines a 40mm deep, 36mm wide T800 carbon rim and straight-pull blade carbon spokes for optimal performance on mixed terrain. Engineered for both road and off-road use, the 30mm internal rim width enhances tire stability, supporting wider tubeless gravel tires (up to 50c) for improved comfort and control. Weighing just 1200 g per set (without tape/valves), this wheelset meets ISO 4210-7 safety standards and is REACH-compliant, providing lightweight durability without sacrificing reliability.
Technical Specifications
- Rim Depth: 40 mm
- Internal Rim Width: 30 mm | External Width: 36 mm
- Material: T800 UD or Marble Matte Carbon Fiber
- Spokes: Straight-pull blade carbon, 20 front/rear, 2-cross lacing
- Hub: Aluminum BL350, Enduro bearings, 54T ratchet, Center Lock disc, 12x100mm/12x142mm thru-axle & QR compatible
- Tubeless Ready: Yes
- Set Weight: 1200g (no tape/valves)
- Certifications: ISO 4210-7, REACH-compliant
Performance and Use Cases
- Supports wider gravel tires for improved grip and compliance on variable surfaces
- Aerodynamic 40mm depth balances stability and speed on both paved and rough roads
- Straight-pull blade carbon spokes enhance lateral stiffness for precise handling under load
- Ready for modern tubeless setups, maximizing puncture resistance and ride comfort
Specification Comparison Table
| Feature | Bola PRM 40G | Competitor Avg. |
|---|---|---|
| Rim Depth | 40mm | 40–44mm |
| Internal Width | 30mm | 21–27mm |
| Weight (set) | 1200g | 1335–1350g |
| Spokes | Carbon, Blade | Steel/Alloy, Aero |
| Tubeless Ready | Yes | Yes |
| Hub Engagement | 54T | 36T–54T |
Real-World Tradeoffs
- While the 40mm rim offers strong aerodynamic advantages, it may be less optimal for high-wind conditions compared to lower-profile options.
- The all-carbon spoke construction reduces weight but may require specialist attention for repairs.
Frequently Asked Questions
Are 40mm deep carbon gravel wheels good for both road and off-road riding?
Yes, the 40mm depth and 36mm external width balance aerodynamic efficiency for road use with off-road stability, making them suitable for mixed-terrain cycling.
How does a 1200g 700C carbon wheelset compare to alloy options for gravel bikes?
The 1200g set weight is significantly lighter than typical alloy gravel wheelsets (often 1500g+), offering faster acceleration and climbing benefits.
What are the benefits of straight-pull blade carbon spokes on gravel wheelsets?
Straight-pull blade carbon spokes improve lateral stiffness and reduce rotational weight, enhancing responsiveness and ride feel on challenging surfaces.
Is this wheelset compatible with tubeless tires and thru-axle setups?
Yes, the rim is tubeless-ready and compatible with standard gravel tubeless tires; hubs support both 12x100mm/12x142mm thru-axle and QR systems.
Will wider 36mm carbon rims improve tire stability and comfort on mixed terrain?
The wide rim profile supports larger tire volumes (up to 50c), resulting in better tire stability, lower pressure capability, improved grip, and increased compliance on rough surfaces.
