700c Carbon Tubeless Rim — 50mm Depth, 30mm Wide | Bola
700c Carbon Tubeless Rim — 50mm Depth, 30mm Wide | Bola
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The Bola 700c carbon tubeless road rim — a 50mm-deep, 30mm-wide aero hoop in Toray carbon (375-470g) for aero road and gravel builds.
Deep enough to fly, light enough to climb: a 50mm V-profile pays back on the flats and in the pack, yet Bola offers it in layups from 375g to 470g so you need not suffer on the ascents.
Buying Guide.
Weight tier - Extreme Light ~375g: the Ultralight climb build - carry the deepest section on the flat while keeping the climbs tolerable.
Weight tier - Ultralight ~400g: the race middle - a touch more margin without losing the light-and-fast aero feel.
Weight tier - Superlight ~430g: the training-and-race balance - choose it when the wheel sees both fast group rides and longer training.
Weight tier - Normal ~470g: the Midweight durability build - rougher roads and larger riders who want impact margin on a deep aero rim.
Internal width - 24 or 25mm: choose the narrower channel for a faster, rounder race tire, the wider for a more voluminous 28-32c on mixed roads.
Same-depth series: pair with the Bola 700c 50mm 28mm-outer rim ($310) for a narrower, lighter 50mm alternative.
Adjacent depth: step to the 40mm or 45mm rim ($310) if crosswinds worry you; the 60mm rim goes deeper on flat, straight courses.
Rated to a 120kg rider weight.
Target Audience & Usage Notes.
Road racing, triathlon/TT and fast gran fondos; not pure climbing.
Tubeless 27c-42c; max rider weight 120kg; disc only.
The Ride That Awaits.
Hold it at speed and feel the aero section hold the road like it is hooked on the wind - spins up willingly, then settles into the draft with the calm of a far deeper wheel. The wide bed smooths 27-42c tires into one fast, modern shape. Pick your layup and inner width; a 3-year rim warranty keeps the build worry-free.
Specifications
- Material: Toray UD Carbon
- Rim depth: 50mm
- External width: 30mm
- Internal width: 24–25mm
- Size: 700c
- Profile: V-shaped
- Weight Tier: Normal (470g), Superlight (430g), Ultralight (400g), Extreme Light (375g)
- Max Tire Pressure: 73 for hookless,115 for hooked
Trade-offs & Considerations
- Aero vs Climbing: 50mm depth provides measurable aero gains at speed but adds ~80-120g per rim versus a 35mm rim, making steep climbing stages less efficient.
- Weight vs Durability: Available in four weight tiers (375-470g) allowing riders to prioritize weight savings over durability, but lighter tiers may be less robust under heavy loads.
- Tire Volume vs Speed: 30mm outer width supports 25-32c tires, improving grip and comfort but potentially increasing aerodynamic drag compared to narrower 25mm rims.
- Crosswind vs Aero: 50mm V-profile balances crosswind stability better than deeper 60mm+ rims, but still more susceptible than shallower 35mm rims in gusty conditions.
Performance Test Data
- Fatigue Test: 750,000 cycles @640N (ISO 4210-7 Annex A, informative only)
- Impact Resistance: >40J (ISO 4210-7 reference)
- Flatness: <0.25mm (internal QC)
- Roundness: <0.3mm (internal QC)
- Max Spoke Tension: >300kg (internal QC)
- Ultimate Strength: >100kg (internal QC)
- Dynamic Equilibrium: <3g (internal QC)
- Radial Stiffness: 90–110 N/mm (internal lab)
- Lateral Stiffness: ≥8N/mm
- Max System Weight: 120kgs
Recommended Use Cases
- Sprinting / Criterium: Good
- Triathlon / TT: Excellent
- Road Racing: Good
- Gran Fondo / Endurance: Suitable
- Climbing / Hill Repeats: Not recommended
- Not Recommended For: Not recommended
Compatibility
- Frame Compatibility: 700c road and gravel frames
- Tire Type: Tubeless (hookless-compatible)
- Tire Width Range: 27c-42c
- Brake Standard: Disc brake only
- Drivetrain: Compatible with all major road groupsets (via hub choice)
- Rotor Standard: Determined by hub (centerlock or 6-bolt)
How It Compares
| Model | Hub | Spoke | Bearing | Weight | Depth | Width | Price |
|---|---|---|---|---|---|---|---|
| Bola 50mm | N/A | N/A | N/A | 375-470g | 50mm | 24–25mm | see store |
| CLX 50 | N/A | N/A | N/A | ~600g | 50mm | ~28mm | ~$900 |
| 404 | N/A | N/A | N/A | ~550g | 58mm | ~27.8mm | ~$800 |
| SES 5.6 | N/A | N/A | N/A | ~550g | 56mm | ~29mm | ~$1000 |
FAQ
What tubeless setup is required for these rims?
These rims are tubeless-ready with a hookless-compatible bead seat. Use tubeless tape and valves, and follow tire manufacturer's guidelines. Recommended tire sizes are 25c to 32c, and pressure range is 100-125 psi. For best results, use a tubeless-specific tire and sealant.
What tire widths are compatible with this rim?
The rim supports 25c to 32c tubeless tires. The internal width of 24-25mm allows a fuller tire profile, improving grip and reducing rolling resistance. For climbing, 25c or 28c is recommended.
How much weight can I save with the different weight tiers?
The rim comes in four weight tiers: Normal (470g), Superlight (430g), Ultralight (400g), and Extreme Light (375g). Choosing a lighter tier can save up to 95g per rim compared to the normal version.
Can I build custom wheels with these rims?
Yes, the rim is designed for custom builds. It has an ERD of 538mm for spoke length calculation, 6.5mm valve hole (customizable), 4.5mm spoke holes, and nipple offset options (front 7°, rear 5° or 7°). It supports a spoke hole tension of over 280kg.
What maintenance and inspection is required?
Regularly check for impact damage, delamination, or cracks, especially after hard rides. Brake heat can be an issue with carbon rims; avoid excessive braking on long descents. Use the specified torque and ensure proper spoke tension. The rim is rated for a maximum rider weight of 120kg.
Warranty & Shipping
- Warranty Period: 3 years for rims / 2 years for wheelsets
- Warranty Coverage: Manufacturing defects on carbon structure
- Crash Replacement: 30% discount within warranty period
- Processing Time: 1–3 business days; 7–15 business days for custom or out-of-stock items
- Shipping Method: FedEx / UPS / DPD Economy (free, duties & VAT included) · Expedited option at checkout (duties & VAT payable on delivery)
- Estimated Delivery:Economy 7–20 business days · Expedited 3–7 business days, excluding customs clearance
- Packaging: Double-wall carton with foam protection
