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55mm Carbon Road Rim 700C 30mm Asymmetric | Bola

55mm Carbon Road Rim 700C 30mm Asymmetric | Bola

Regular price $310.00 USD
Regular price $350.00 USD Sale price $310.00 USD
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Shipping calculated at checkout.
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Size: 700C

The Bola 55mm asymmetric carbon road rim - a 55mm deep, 30mm-wide tubeless-ready UD carbon rim for aero road racing, triathlon and fast endurance builds, with a 2.8mm offset for even spoke tension.

Where shallow wheels give way and crosswinds intrude, the Bola 55mm asymmetric rim stands firm - a wind-cheating hoop built for the racer who refuses to surrender a single watt.

Buying Guide.

Weight tier - Standard ~520g (Heavy/Durable): choose it for training miles, rough roads and larger riders who want impact margin over feather weight.

Weight tier - Superlight ~460g (Midweight): the all-round pick, lively for rolling hills and sprints without giving up durability.

Weight tier - Ultralight ~445g (Midweight): the climber's and racer's pick, shedding rotational mass for rolling and sprint days.

Same-depth series: the 55mm tubular ($310) is a glued-tyre race-day option, while the 55mm tubeless 28mm rim ($310) runs a narrower, faster tyre platform.

Adjacent depth: step down to the 50mm 30mm rim ($310) for kinder crosswinds, or up to the 60mm 23mm rim ($310) for flat-course aero.

Choose per rider mass; system weight limit applies.

Target Audience & Usage Notes.

racers, triathletes and wheel builders building a disc-brake aero road wheelset.

Build it with a modern disc hub, 24-28 spokes and 27-42mm tubeless tyres; rider weight rated to 125kg, max tyre pressure per the spec rating (tubeless run lower, ~70-90 PSI, per ETRTO 2026 wide-rim guidance).

Exact tier weight to confirm at order.

The Ride That Awaits.

Picture the first pedal stroke on a dawn coast road: wide 28-32c tyres thud home, and the offset build holds a true, stiff wheel as the deep aero section slices the wind off your bars.

Lean into a descent and the carbon hums, steady in the gusts, willing you on.

Free shipping and a 3-year rim warranty mean the only thing left between you and the start line is the build.

Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 55mm
Bead Type: Hooked
Inner Width: 24mm
Outer Width: 30mm
ERD (Effective Rim Diameter): 518
Weight Tier: 440-515g
Trade-offs & Considerations
Aero vs Crosswind: 55mm depth saves about 5.0W versus a 40mm rim at 40km/h, but at 10° yaw the deep section pushes noticeably harder in crosswinds than a 40mm rim; the 30mm outer width tames it partly.
Weight vs Stiffness: The 440–515g tier spans about 75g (±5g); moving from the 515g heavy end to the 440g light end trims about 75g of rotating mass, while lateral stiffness holds within 3% because the rim wall and spoke bed are unchanged.
Tire-Type Trade-off: The hooked bead accepts clincher and tubeless tyres from about 25c to 32c and supports higher pressure than hookless; tubeless cuts rolling resistance but needs tape, valve and sealant to seal the bed.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $310; custom 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: >60J (Higher than ISO 4210-7)
Flatness: <0.25mm (internal QC)
Roundness: <0.3mm (internal QC)
Max Spoke Tension: >350 kgf (internal QC, spoke breaking tension)
Ultimate Strength: >300 kgf (internal QC, static spoke-hole point load)
Dynamic Equilibrium: <3g (internal QC)
Radial Stiffness: 90–110 N/mm (internal lab)
Lateral Stiffness: ≥8N/mm
Max System Weight: 125kgsA
Recommended Use Cases
Aero Road / Time Trial Build: The 55mm asymmetric section saves about 5.0W versus a 40mm rim at 40 km/h for flat-course aero builds; the 30mm outer width tames crosswinds partly.
Criterium / Sprint Build: The hooked 24mm bed runs 25-32c clincher or tubeless at higher pressure than hookless, for fast crit and sprint wheel builds.
Custom Handbuilt Build: Weights span 440-515g (about 75g across the tier), ERD 518, with 20/20 or 24/24 drillings to lace to your chosen hub.
Not Recommended For: Novice riders in exposed gusts - at 10 degrees yaw the 55mm deep section pushes harder than a 40mm rim.
Compatibility
Frame Compatibility: 700C
Tire Type: Tubeless
Tire Width Range: 27-42mm
Brake Standard: Not specified
Drivetrain: Not applicable
Rotor Standard: Not applicable
How It Compares
ModelWeightDepthWidthPrice
700C 55mm Rim 30mm 440-515g 55mm 30mm See store
Corima 50G 1550g 50mm 27mm internal / 32mm external €1,640
Mavic Comete 65 1410g 65mm 25mm €1,149
Fulcrum Wind 57 DB 1680g 55mm 19mm(内宽;外宽27mm) €1,358
FAQ
Do I get a bare rim here, or is it built up with a hub and spokes?
It's a bare carbon rim — no hub, spokes or nipples. Take it to any wheel builder to lace it to your own hub; we can also supply a built wheel on request.
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 spoke tension can I safely build to — will the holes pull out of the carbon?
Drive-side / disc-side maximum tension is 130–140 kgf, with the non-drive side adapted to match; the spoke holes are locally reinforced inside the carbon layup to prevent pull-out cracking.
How does a deep aero rim handle crosswinds — will it tug the steering on fast descents?
An optimised aero profile keeps steering torque predictable at 10°–15° yaw, so high-speed descents stay planted and controlled.
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, and 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 within 1 year of the original purchase date
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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