Bola 700C 50mm Asymmetric Carbon Tubular Rim | 28mm Wide

$310.00 USD

~~$350.00 USD~~ $310.00 USD

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Free shipping | VAT included in EU & USA

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Weight Standard Superlight

The Bola 700C 50mm carbon tubular rim - a light 28mm-wide U-shape glued-tyre race rim, T700/T800 carbon, for aero road and climbing race builds.

The classic race tubular, renewed: the Bola 50mm tubular is the do-everything glue-tire rim - aero enough for flats, light enough for climbs. Fifty millimetres of T700/T800 carbon, 28mm wide, sold rim-only.

Buying Guide.

Weight tier - Superlight ~350g: the stage-racer's pick - lightest end for climbs while keeping 50mm of aero.

Weight tier - Normal ~375g: the durable choice - a touch more layup for a season of race days.

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

Same-depth series: the 50mm road/gravel rim and 50mm offset tubeless are the tubeless alternatives if you do not want to glue.

Adjacent depth: the 45mm tubular climbs better; the 55mm tubular goes deeper.

Target Audience & Usage Notes.

Target audience.: Road racers and stage racers who ride tubulars.

Rim-only.

Glue your own tyres; use carbon-specific rim-brake pads; respect 145 psi and 120kg.

Not for riders unwilling to glue.

The Ride That Awaits.

Cement a 25-28mm tubular, lace to a lightweight race hub, and feel the stage unfold: 50mm of aero on the flat, 350g spinning up the climb, the glued tyre lending every steer its edge. This is the wheelset you build for stage racing. Free shipping, a 3-year rim warranty and crash-replacement discount.

Specifications

Size: 700c

Material: Genius Toray carbon fiber

Rim Depth: 50mm

Rim Type: Tubular / Glue-on

Glue Bed Width: 28

ERD (Effective Rim Diameter): 539mm

Weight Tier: Superlight 350g / Normal 375g (+/-15g)

Trade-offs & Considerations

Aero vs Crosswind: 50mm depth saves about 4.5W versus a 35mm rim at 40km/h; at 10° yaw it balances aero and climbing better than the 55–60mm depths, making it the all-round race choice for mixed terrain.

Weight vs Stiffness: The Superlight layup (350g) saves about 25g versus the Normal layup (375g) at the same 50mm depth (±5g); lateral stiffness holds within 3% across the two layups.

Tire-Type Trade-off: Glue-on tubulars give about 8% lower rolling resistance than clincher tubeless, but the tyre is glued: service every 3–6 months, no roadside puncture repair and no sealant-based flat prevention.

Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $310; custom spoke-hole count or valve hole adds 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); 50mm 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 with rim brakes

Tire Type: Tubular (glued)

Tire Width: 25-32mm tubular

Valve: Presta (tubular valve)

Brake: Rim brake - use carbon-specific pads

How It Compares

Model	Weight	Depth	Width	Price
700C 50mm Tubular Rim 28mm	Superlight 350g / Normal 375g (+/-15g)	50mm	N/A	See store
Model A	~430g	50mm	N/A	$1,399
Model B	~430g	50mm	N/A	$249
Model C	~420g	50mm	N/A	$389

FAQ

Can I run clincher or tubeless tyres on this, or is it a glue-on tubular rim?

This is a dedicated tubular rim: you glue on tubular tyres. It is not drilled or shaped for clincher or tubeless clincher tyres.

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

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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