Bola ULT 45R 700C Carbon Disc Wheelset – 45mm Tubeless Road & Gravel, 1230g
Bola ULT 45R 700C Carbon Disc Wheelset – 45mm Tubeless Road & Gravel, 1230g
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Bola ULT 45R 700C delivers lightweight, aerodynamic performance for both road and gravel riders, combining a 45mm deep T800 carbon rim with dual tubeless width options. Weighing only 1230g, this wheelset is engineered for fast acceleration and stable handling across mixed terrain, with ISO 4210-7 and REACH-certified quality you can trust.
Key Features & Specs
- Rim Depth: 45mm – aerodynamic for road, stable for gravel
- Internal Width: 21mm or 24mm – select for tire compatibility (28–48mm tubeless)
- External Width: 28mm or 30mm – supports wide, modern tires
- Material: T800 unidirectional matte carbon fiber rim, BL180 hub, TPI ceramic bearings
- Spoke Count: 24 front / 24 rear – Sapim CX-Ray stainless steel, 2-cross lacing
- Hub System: BL1 alloy hub, TPI ceramic bearings, 12x100/12x142mm or QR compatibility
- Weight: 1230g (set, excludes tape/valves)
- Certification: ISO 4210-7, REACH compliant
- Warranty: 24 months limited, global support
How it Compares
| Feature | Bola ULT 45R 700C | Performance Model (e.g., CSC Ultralight 1137g/C45AR) |
|---|---|---|
| Weight (pair) | 1230g | 1137g – 1455g |
| Rim Material | T800 UD Carbon | Varies (T700/T800, mix UD) |
| Rim Depth | 45mm | 45mm |
| Internal Width | 21/24mm | 23–26mm |
| External Width | 28/30mm | 30–32mm |
| Spokes | Sapim CX-Ray (steel) | Carbon/Steel, varies |
| Bearings | TPI Ceramic | Ceramic/Steel, varies |
| Tubeless Ready | Yes | Yes |
| Hub System | BL1, in-house QC | Mix (Ratchet, USA-made, or OEM) |
| Certification | ISO 4210-7, REACH | Not always specified |
| Warranty | 24 months, global service | 12–24 months, varies |
| Use Scenarios | Road/Gravel/Touring | Road/Gravel; some single-use focus |
Recommended Use Cases
- Upgrading to a lightweight 45mm carbon disc wheelset for mixed road and gravel events
- Training and race use for amateur and endurance cyclists seeking improved acceleration and aero efficiency
- B2B: Supplying versatile, certified carbon wheels for independent bike shops and cycling retailers
- OEM/ODM customization for small brands seeking in-house hub and rim specification controls
- Cross-terrain projects: Touring, club rides, gravel racing, and daily road commutes with tubeless set-up
Frequently Asked Questions
Are 45mm carbon disc wheels good for both road and gravel riding?
Yes. The Bola ULT 45R 700C features a 45mm aerodynamic rim paired with 21mm or 24mm internal widths, supporting 28–48mm tubeless tires. This design balances aero gains for road with stability and comfort for mixed-surface gravel, validated by ISO 4210-7 standards.
What's the weight difference between 45mm and 30mm carbon wheelsets for gravel bikes?
The Bola ULT 45R 700C weighs 1230g, competitive with leading 45mm options. 30mm deep carbon wheelsets often weigh 1050–1200g, but deliver less aerodynamic benefit for fast road riding. Choose 45mm for a broader balance of speed and multi-use capability.
Will a 45mm deep rim fit 28–48mm tubeless tires safely?
Yes, both the 21mm and 24mm internal rim width options are tubeless-ready and tested for compatibility with 28–48mm tires. This configuration optimizes tire profile for safety, stability, and reduced rolling resistance across diverse riding surfaces.
How do Sapim CX-Ray spokes and TPI ceramic bearings improve wheel performance?
Sapim CX-Ray spokes offer high tensile strength with minimal aerodynamic drag, enhancing wheel stability and ride smoothness. TPI ceramic bearings reduce friction and improve hub durability, resulting in faster rolling and sustained performance under heavy mileage.
Is a 1230g carbon wheelset worth it for lightweight road cycling?
Bola ULT 45R 700C's 1230g weight enables more responsive acceleration, easier climbing, and reduced fatigue on long rides. While not the absolute lightest in the field, it achieves a strong balance of weight, stiffness, and price, suitable for both performance-focused enthusiasts and budget-conscious riders.
