Bola 700C 45mm Carbon Tubular Rim | 28mm Wide

$310.00 USD

~~$350.00 USD~~ $310.00 USD

Sale Sold out

Free shipping | VAT included in EU & USA

Weave UD Matt UD Glossy Marble Matt Marble Glossy

Spoke QTY 20/24 24/24 Customs

Weight Standard Superlight

The Bola 700C 45mm carbon tubular rim - a light 28mm-wide U-shape glued-tyre race rim for climbing and all-round road racing.

The climber's tubular: light, lively, still aero enough for the flats. The Bola 45mm tubular pairs a 45mm U-shape with the direct feel of a glued tyre, built for riders who want to float up climbs.

Buying Guide.

Weight tier - Superlight ~330g: the climber's pick - lightest end to float up climbs, for lighter racers.

Weight tier - Normal ~355g: the durable choice - a touch more layup margin for roughened mountain descents.

Max rider weight: rated to 110kg - check rider + gear before ordering.

Same-depth series: the 45mm U-shape tubeless is the tubeless road sibling; the 45mm gravel rim is the wide gravel version.

Adjacent depth: the 40mm tubular asymmetric climbs better; the 50mm tubular adds aero.

Target Audience & Usage Notes.

Target audience.: Climbers and stage racers on tubulars.

Rim-only.

Glue your own tyres; use carbon-specific rim-brake pads; respect the pressure limit and 110kg.

Not for riders unwilling to glue.

The Ride That Awaits.

Cement a 25-28mm tubular, lace to a lightweight climbing hub, and the mountain comes to you: 330g of rim, 45mm of aero, the glued tyre speaking back through every hairpin. Float up, then fly down. Free shipping, a 3-year rim warranty and crash-replacement discount - your climb starts here.

Specifications

Size: 700c

Material: Genius Toray carbon fiber

Rim Depth: 45mm

Rim Type: Tubular / Glue-on

Glue Bed Width: 28

ERD (Effective Rim Diameter): 549mm

Weight Tier: TBD

Trade-offs & Considerations

Aero vs Crosswind: 45mm depth saves about 3.5W versus a 35mm rim at 40km/h; at 10° yaw the 28mm tubular bed stays composed, sitting between the calm 35mm depth and the punchier 55mm option on exposed roads.

Weight vs Stiffness: The Superlight layup (330g) saves about 25g versus the Normal layup (355g) at the same 45mm depth (±5g); lateral stiffness holds within 3%, trimming resin where the rim carries no load.

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: >200 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: 110kg

Recommended Use Cases

Road Racing Builds: 2026 peloton standard is 28-30mm tubeless on wide rims (TdF 2026 avg ≈30mm); 45mm 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 (110kg); 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 45mm Tubular Rim 28mm	TBD	45mm	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

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.

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.

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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