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Bola 700C 55mm Asymmetric Carbon Tubeless Rim | 28mm Wide

Bola 700C 55mm 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 55mm asymmetric carbon tubeless rim - a 28mm-wide offset-bed Toray aero rim for stiff, true aero road and disc-brake builds.

The stiff aero rim: the Bola 55mm asymmetric tubeless offsets the spoke bed to the drive side, evening spoke tension for a stiffer, truer rear wheel. Fifty-five millimetres of Toray carbon, 28mm wide, sold rim-only.

Buying Guide.

Weight tier - Extreme Light ~430g: the racer's pick - lightest end for a stiff, disc-built aero wheel, for lighter riders.

Weight tier - Ultralight ~450g: the balanced middle - lively on rolling hills, stable at 55mm depth.

Weight tier - Superlight ~465g: the all-rounder band - impact margin for a season of racing.

Weight tier - Standard ~515g: the durable daily hoop for larger riders and rougher roads; the extra grams buy impact margin.

Max rider weight: rated to 120kg - check rider + gear before ordering.

Same-depth series: the 55mm U-shape tubeless is the symmetric version; the 55mm tubular is the glued race option; the 55mm road rim is the wide-outer take.

Adjacent depth: the 50mm offset tubeless climbs better; the 60mm U-shape goes deeper on the flat.

Target Audience & Usage Notes.

Target audience.: Road racers and aero builders wanting disc-friendly offset.

Rim-only.

Seat tubeless beads with a compressor; respect 110 psi and 120kg.

Not for steep climbing or crosswind novices.

The Ride That Awaits.

Lace it to a disc road hub, seat a 28-32c tubeless, and stand on the pedals at dawn: the offset builds hold a true, stiff wheel, the carbon humming through fast descents, the 55mm section slicing cleanly past the bars. Where shallow wheels give way, this one holds firm. Free shipping, a 3-year rim warranty and crash-replacement discount - build your aero, keep your peace.

Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 55mm
Bead Type: Hooked
Inner Width: 21mm hooked / 23mm hookless
Outer Width: 28mm
ERD (Effective Rim Diameter): 528mm
Weight Tier: Extreme Light 430g / Ultralight 450g / Superlight 465g / Standard 515g (+/-10-15g)
Trade-offs & Considerations
Aero vs Crosswind: 55mm depth saves about 5.5W versus a 35mm rim at 40km/h; at 10° yaw the 28mm outer width keeps handling calmer than a box-section rim, while the asymmetric offset evens drive/non-drive spoke tension for a stiffer rear.
Weight vs Stiffness: The Extreme Light tier (430g) saves about 85g versus the Standard tier (515g) at the same 55mm depth (±5g); lateral stiffness holds within 3% across tiers.
Tire-Type Trade-off: The hooked bead (21mm internal) accepts a wider range of tyres and pressures; the hookless option (23mm internal) adds tyre volume but requires ETRTO-certified tubeless tyres run at 72–87 psi.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $310; a custom spoke-hole count, hooked/hookless variant 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: 80–92 N/mm (internal lab)
Lateral Stiffness: 16–23 N/mm
Max System Weight: 120kg
Recommended Use Cases
Road Racing Builds: 2026 peloton standard is 28-30mm tubeless on wide rims (TdF 2026 avg ≈30mm); 55mm section suits 40+ km/h racing.
Gran Fondo / Endurance: Modern 2026 frames (Propel, SuperSix, S5) design around 30-32mm clearance; 21mm inner bed pairs 25-32mm tubeless per ETRTO 2026 guidance.
Wheel Building: Custom road builds with disc or rim hubs; UD carbon layup options for weight-conscious or durable builds.
Weight Tier Selection: Offered in weight tiers (120kg); lighter for climbing, heavier for training and impact margin.
Compatibility
Frame: 700C (ISO 622) road frames; disc or rim brake per hub
Tire Type: Tubeless-ready clincher
Tire Width: 25-40mm
Valve: Presta
Brake: Disc or rim brake (hub-dependent)
How It Compares
ModelWeightDepthWidthPrice
700C 55mm Rim 28mm Extreme Light 430g / Ultralight 450g / Superlight 465g / Standard 515g (+/-10-15g) 55mm 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.
Will the rim crack on rock gardens or bottom-outs at low pressure?
The rim bead area uses a thickened impact-reinforced layer; impact testing passes >60J extreme impacts (above the ISO 30J standard). Inner widths of 21/23mm accept wider tyres, which deform to absorb shock at low pressure.
What tyres can I mount on this rim, and what pressure should I run?
The 21mm hooked / 23mm hookless inner widths take tubeless tyres from 25mm to 40mm, with 28–32mm the aero sweet spot.
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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