Carbon Fiber Sporting Goods
Bola PRM 50R Carbon Disc Wheelset 700C – 50mm Deep, 21/24mm Inner, Blade Carbon Spokes, Tubeless Ready, 1230g
Bola PRM 50R Carbon Disc Wheelset 700C – 50mm Deep, 21/24mm Inner, Blade Carbon Spokes, Tubeless Ready, 1230g
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Engineered for competitive riders, the Bola PRM 50R Carbon Disc Wheelset offers a lightweight 1230g (set, without tape/valves) construction, 50mm mid-depth rims for aerodynamic efficiency, and blade carbon spokes for enhanced power transfer and durability. Compatible with both road and gravel bikes, the Bola PRM 50R supports tubeless tires (21mm or 24mm internal width) and is certified to ISO 4210-7 and REACH standards for structural reliability.
Technical Specifications
- Rim Depth: 50mm mid-profile for balanced aerodynamics and crosswind stability
- Internal Rim Width: Choice of 21mm (road) or 24mm (gravel, CX); External Width: 28mm or 30mm
- Weight: 1230g (set, no tape/valves)
- Spoke Count: 20 front and rear, 2-cross lacing
- Spokes: Straight-pull blade carbon spokes for increased lateral stiffness
- Rim Material: T800 UD matte carbon fiber
- Hub: Aluminum BL350, Enduro bearings, 54T ratchet, Center Lock disc, 12x100mm & 12x142mm thru-axle or QR compatible
- Certification: ISO 4210-7, REACH-compliant
Performance Comparison
| Feature | Bola PRM 50R | Common Alternatives |
|---|---|---|
| Weight (set) | 1230g | 1300–1450g typical |
| Rim Depth | 50mm | 40–50mm |
| Internal Width | 21/24mm | 19–22mm, narrow |
| Spokes | Blade carbon | Sapim CX-Ray/steel |
| Certifications | ISO 4210-7, REACH | UCI, ISO |
Use Cases
- Road Cycling: Supports 28–32mm tires for high-speed aero use
- Endurance & Gravel: 24mm inner width fits up to 48mm tires, tubeless ready for reduced flats and improved comfort
- Upgrade Path: Compatible with major hub standards and disc brakes for flexible integration
Real-World Benefits
- 1230g weight supports rapid acceleration and hill climbing
- Blade carbon spokes provide high stiffness and lower inertia over steel, while maintaining ride compliance
- Tubeless compatibility means lower rolling resistance and improved puncture protection
Frequently Asked Questions
Are 50mm carbon disc wheels good for both road and gravel riding?
Yes, Bola PRM 50R is designed for both gravel and road use, with 21mm or 24mm internal width options to fit 28–48mm tires and tubeless compatibility.
What are the weight benefits of a 1230g carbon wheelset?
At 1230g, this wheelset offers lower rotational weight for improved acceleration and less fatigue during races, matching leading ultra-light carbon models.
How does the Bola 50R with blade carbon spokes compare to wheels with Sapim CX-Ray spokes?
Blade carbon spokes are lighter and stiffer than Sapim CX-Ray steel spokes, offering improved power transfer and a slight increase in comfort due to carbon’s vibration damping.
Is a 21mm or 24mm internal width rim suitable for 32mm tires?
Yes, a 21mm inner width suits 28–32mm tires for modern road and endurance setups, while 24mm supports wider gravel tires up to 48mm.
What performance benefit do blade carbon spokes provide on a 50mm carbon wheel?
Blade carbon spokes increase lateral stiffness and reduce weight versus steel spokes, leading to snappier acceleration and improved stability while maintaining compliance.
