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BOLA 700c Carbon Tubular Road Rim | 50mm Deep, 25mm Wide, 355g

BOLA 700c Carbon Tubular Road Rim | 50mm Deep, 25mm Wide, 355g

$310.00 USD
$350.00 USD $310.00 USD
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Free shipping  |  VAT included in EU & USA
700c Carbon Tubular Rim 50mm x 25mm — 355g | Bola
Spoke QTY
Weight

The Bola 700c U-shape carbon tubular rim — a 50mm-deep, 25mm-wide featherweight (355g) built for glued tubular road racing and crits.

For race day and the glued tire: a 50mm aero profile on a 25mm outer, at a feather 355g — built for criteriums, road races and time trials where every watt counts.

Buying Guide.

Weight tier - Superlight ~355g: a single-tier Ultralight race build - the lightest way to run a deep aero section, for criteriums, road races and time trials where watts are everything.

Tire choice: glued tubulars only (25-28mm optimum) - accept the gluing ritual for a lighter, suppler race tire; this is not a tubeless or everyday wheel.

Adjacent depth: the 35mm tubular (~295g, $310) is the lighter, shallower climbing tubular; the 60mm tubular ($310) goes deeper for flat-course speed.

Rated to a 120kg system weight; manage heat on long descents behind a rim-brake caliper.

Target Audience & Usage Notes.

Road racers, crit riders, tri/TT.

Max system weight 120kg (spec); not for tubeless convenience or everyday commuting.

The Ride That Awaits.

Glue the tire, roll to the line, and let the deep section do the work - it holds speed on the flat like it is being pulled by a magnet, yet climbs surprisingly well for its depth. Criteriums and time trials reward every saved watt, the light rim answering every surge. Build a featherweight 50mm tubular wheelset; a 3-year rim warranty has you covered on race day.

Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 50mm
Rim Type: Tubular / Glue-on
Glue Bed Width: 25
ERD (Effective Rim Diameter): 539
Weight Tier: Superlight 355g
Trade-offs & Considerations
Aero vs Crosswind: 50mm depth saves about 4.5W versus a 35mm rim at 40km/h; at 10° yaw the narrow 25mm outer width keeps steering predictable, with a lighter crosswind touch than a 28mm-wide 50mm rim.
Weight vs Stiffness: The single Superlight layup weighs 355g, about 100g less than typical carbon clincher rims of similar depth (450–500g), trimming rotating mass at the cost of a thinner, race-oriented resin bed.
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; a custom valve hole 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: 120kgs
Recommended Use Cases
Sprinting / Criterium: Excellent
Triathlon / TT: Excellent
Road Racing: Excellent
Gran Fondo / Endurance: Good
Climbing / Hill Repeats: Suitable
Not Recommended For: Not recommended
Compatibility
Frame Compatibility: 700c road frames with rim brakes
Tire Type: Tubular (glued/sewn-on)
Tire Width Range: 25-36mm recommended (optimized for 25mm outer width)
Brake Standard: Rim brake (caliper)
Drivetrain: Compatible with standard road drivetrains (Shimano/SRAM/Campagnolo)
Rotor Standard: N/A (rim brake)
How It Compares
ModelWeightDepthWidthPrice
700C 50mm Tubular Rim 25mm Superlight 355g 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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