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Bola 700C 45mm Asymmetric Carbon Tubeless Rim | 28mm Wide

Bola 700C 45mm Asymmetric Carbon Tubeless Rim | 28mm Wide

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

The Bola 700c asymmetric U carbon tubeless rim — a 45mm-deep, 28mm-wide aero hoop (375-460g) built for road and gravel.

Deep enough to slice the wind, wide enough to carry comfort: a 45mm asymmetric U-profile blends aero depth with a wide outer for modern tires, while the offset spoke bed evens tension for a stiffer, longer-lasting wheel.

Buying Guide.

Weight tier - Extreme Light ~375g: the Ultralight build for a deep 45mm rim - fast climbs without surrendering flat aero.

Weight tier - Ultralight ~380g: the race middle.

Weight tier - Superlight ~405g: the endurance-and-race balance.

Weight tier - Standard ~460g: the Midweight durability build for rough mixed-surface miles and larger riders.

Internal width - Hooked 21mm: a narrow, fast 25-32mm platform with broad tube compatibility.

Internal width - Hookless 23mm: a wider 28-38mm low-pressure tubeless platform for comfort.

Adjacent depth: this sits between the 40mm and 50mm road rims ($310) - the 45mm Gravel Road Rim is its wider gravel counterpart.

Rated to a 110kg rider weight; confirm brake standard at order.

Target Audience & Usage Notes.

Endurance road, gran fondo, gravel and fast training.

Max rider weight 110kg.

Brake compatibility (disc vs rim-brake) should be confirmed at order.

Not heavy off-road.

The Ride That Awaits.

Open the taps on a fast flat and feel the 45mm section carry you - aero without the twitch, wide enough to swallow modern tires, stiffened by the offset bed. It holds speed on the flat and settles quickly in gusts, the wheel staying true under disc load. Choose bead type and layup; a 3-year rim warranty rides with you.

Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 45mm
Bead Type: Hooked
Inner Width: 21mm(hook)/23mm(hookless)
Outer Width: 28mm
ERD (Effective Rim Diameter): TBD
Weight Tier: Extreme-Light (375g), Ultra-Light (380g), Super-Light (405g), Standard (460g)
Trade-offs & Considerations
Aero vs Crosswind: 45mm depth saves about 3.5W versus a 35mm rim at 40km/h; at 10° yaw the 28mm outer width keeps the front end settled, and the asymmetric drilling balances rear spoke tension — at the cost of more crosswind pull than a 35mm rim.
Weight vs Stiffness: The Extreme-Light tier (375g) saves about 85g versus the Standard tier (460g) at the same 45mm depth (±5g); lateral stiffness holds within 4% across tiers because the asymmetric bed is unchanged.
Tire-Type Trade-off: The rim ships hooked (21mm inner) or hookless (23mm inner) and runs 25–32mm tyres; the hooked bead tolerates higher pressure and more tyre choice, while hookless needs ETRTO-certified tyres but seals more easily at lower pressure.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $310; a custom bead (hookless), spoke-hole count or decals 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: 110kgs
Recommended Use Cases
Climbing / Hill Repeats: Good.
Gran Fondo / Endurance: Excellent.
Road Racing: Good.
Sprinting / Criterium: Suitable.
Training / Daily Riding: Excellent.
Not Recommended For: Not recommended for heavy off-road or aggressive downhill riding.
Compatibility
Frame Compatibility: 700c (ISO 622) wheels; disc and rim brake frames
Tire Type: Tubeless or tube; hooked or hookless bead compatible
Tire Width Range: 25-38mm recommended
Brake Standard: Disc (Center Lock or 6-bolt) and rim brake compatible
Drivetrain: Compatible with standard road and gravel drivetrains
Rotor Standard: Center Lock or 6-bolt
How It Compares
ModelWeightDepthWidthPrice
700C 45mm Rim 28mm Extreme-Light (375g), Ultra-Light (380g), Super-Light (405g), Standard (460g) 45mm 28mm See store
Model A ~430g 50mm 28mm $1,399
Model B ~430g 50mm 27mm $249
Model C ~420g 50mm 30mm $389
FAQ
What spoke drillings are available, and which brake type is this rim rated for?
Spoke drillings and brake rating depend on the build option, selectable at checkout. If you plan to lace your own wheel, confirm the drilling and brake type with Bola before ordering so the rim matches your hub and frame.
What is the maximum spoke tension for this rim?
Drive-side / disc-side max tension is 130–140 kgf, with the non-drive side adapted to match; spoke holes are locally reinforced inside the carbon layup to prevent pull-out cracking.
How does this deep rim handle crosswinds at speed, and is it stable on descents?
The aerodynamic profile keeps steering torque predictable at 10°–15° yaw — the rim stays planted at speed in steady-state crosswinds, with slightly more steering input in gusty conditions than a shallower rim.
What tyres can I mount on this rim, and what pressure should I run?
The rim supports both tubeless and clincher tyres from 25mm to 32mm; for the hookless bead use only hookless-compatible tyres at the maker's rated pressure.
Will I really pay no customs or VAT for delivery to the US and EU?
Yes. The Economy channel ships DDP — duties and VAT are fully prepaid by us, cleared in advance, delivered to your door with no extra payment to customs or the courier.
Warranty & Shipping
Warranty Period: 3 years
Crash Replacement: 30% discount on replacement parts
Processing Time: In stock: 1–3 business days · Out of stock or custom order: 7–15 business days
Shipping method: FedEx/UPS/DPD/EMS Economy (free with duties & VAT included in USA & EU) · Expedited option available
Estimated Delivery: Economy 7–20 business days · Expedited 3–7 business days, customs clearance excluded
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