• Bola 700c 45mm Carbon Road Rim – 34mm Outer, 28mm Inner, Tubeless Ready
  • 700c 40mm Carbon Road Rim – 30mm or 34mm Wide, 23mm Inner Width, Tubeless Ready | Bola Bola
  • 700c 40mm Carbon Road Rim – 30mm or 34mm Wide, 23mm Inner Width, Tubeless Ready | Bola Bola
1 5

700C 40mm Carbon Rim UV shape 23mm | Bola

700C 40mm Carbon Rim UV shape 23mm | Bola

$310.00 USD
$350.00 USD $310.00 USD
Sale Sold out
Free shipping  |  VAT included in EU & USA
Weave
Spoke QTY
Weight

A 40mm U/UV hookless-compatible carbon rim with 30/34mm body outer, 23mm inner width, disc-brake, and three weight tiers 380–430g.

Balanced Aero and Climbing Rim

The BOLA 40mm UV rim balances low weight, aerodynamic profile and practical tire compatibility. Choose 30mm or 34mm outer body width with a 23mm inner bed for 27–40mm tires, in a disc-brake-only configuration.

Buying Guide.

Weight tier - Ultralight ~380g: riders under ~85kg on smooth roads.

Weight tier - Superlight ~400g: endurance and gran fondo.

Weight tier - Standard ~430g: training and OEM, the beefiest.

Depth - balanced middle: aero enough for flats, kind to climbers.

Outer width - two body options: the wider body adds aero, the narrower trims weight; pick to match your course.

Target Audience & Usage Notes.

Road racers, gran fondo riders, OEM wheel builders, and climbers.

Disc brake only.

Not for MTB or heavy off-road.

The Ride That Awaits.

Point it where road meets hilltop and it does everything well - enough aero for the flats, light enough to climb, the bed willing to carry 27-40mm rubber over rough surfaces. It is the wheel that asks you no questions. Free shipping and a 3-year warranty with crash cover mean you ride, not worry.

Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 40mm
Bead Type: Hooked
Inner Width: 23mm
Outer Width: 30mm&34mm
ERD (Effective Rim Diameter): TBD
Weight Tier: Standard (430±15g), Superlight (400±10g), Ultralight (380±10g)
Trade-offs & Considerations
Aero vs Crosswind: The 40mm UV profile is the aero road choice; at 40km/h the 34mm outer width saves about 4.5W versus a 25mm rim, and at 10° yaw the wider 34mm section is stable but carries a larger crosswind signature than the 30mm outer option.
Weight vs Stiffness: The Ultralight tier (380g) saves about 50g versus the Standard tier (430g) (±10g); lateral stiffness holds within 3% because the UV profile and the 23mm internal bed are shared across tiers.
Tire-Type Trade-off: The 23mm internal width pairs with 28–32mm tyres on the 34mm outer rim for aero, or 25–28mm on the 30mm outer rim for lower weight; tubeless needs tape, a 6.5mm valve and sealant to seal the bed.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $310; custom spoke count, valve hole or nipple angles add 7–15 business days and roughly a $40–80 premium.
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: 105kgs
Recommended Use Cases
Climbing / Hill Repeats: Good - The 380g ultralight grade reduces rotating weight, making it a solid choice for climbs.
Gran Fondo / Endurance: Excellent - The 40mm depth and 23mm inner width provide a comfortable, stable ride for long distances.
Road Racing: Good - A balanced depth and weight make it competitive for mixed terrain races.
Sprinting / Criterium: Suitable - Not as aero as deeper rims, but the stiffness and low weight are adequate for crits.
Training / Daily Riding: Good - Durable construction and tubeless-ready build are ideal for frequent use.
Not Recommended For: Not recommended for heavy off-road or MTB use due to road-optimized width and design.
Compatibility
Frame Compatibility: Disc brake road frames with 700c wheels
Tire Type: Tubeless-ready clincher (also works with standard clincher with tube)
Tire Width Range: 27-40mm
Brake Standard: Disc brake only
Drivetrain: Compatible with all standard road groupsets (Shimano/SRAM/Campagnolo)
Rotor Standard: Depends on hub (6-bolt or centerlock)
How It Compares
FAQ
What tyre widths fit this rim?
The 23mm internal width supports 25mm to 32mm tyres; run 28–32mm on the 34mm outer rim for aero, or 25–28mm on the 30mm outer rim for lower weight.
How do I set it up tubeless?
Apply 25mm tubeless tape, fit a 6.5mm tubeless Presta valve, seat the bead with a compressor or high-volume pump, then add sealant.
Which weight tiers are available?
Standard (430±15g), Superlight (400±10g) and Ultralight (380±10g).
What is the UV profile?
The U/UV hooked-compatible profile tunes the rim shape for aero with modern wide tyres; it works with tubeless clincher tyres.
Can I customize the build?
Yes — spoke count, valve hole diameter, nipple angles (front 7°, rear 5° or 7°) and private-label branding are available per order.
Warranty & Shipping
Warranty Period: 3 years
Crash Replacement: 30% discount on replacement parts
Processing Time: 1–3 business days (standard stock); 7–15 business days (custom)
Estimated Delivery: 7–15 business days (standard); 3–5 business days (expedited)
View full details