Skip to product information
1 of 5

700C 50mm Tubeless Carbon Road Gravel Rim 32mm outer 26mm | Bola

700C 50mm Tubeless Carbon Road Gravel Rim 32mm outer 26mm | Bola

Regular price $340.00 USD
Regular price $400.00 USD Sale price $340.00 USD
Sale Sold out
Free shipping  |  VAT included in EU & USA
Weave
Spoke QTY
Weight
Set

The Bola 700C 50mm tubeless carbon road/gravel rim - a versatile 32mm external / 26mm internal Toray carbon rim for all-round road and light-gravel builds.

The rider who refuses to choose - aero on the flat, comfort on the rough - finds a friend in the Bola 50mm road/gravel rim. Fifty millimetres of Toray carbon, 32mm external and 26mm internal, sold rim-only as the best aero-to-weight balance in the road range.

Buying Guide.

Weight tier - Extreme Light ~390g: the climber's aero pick - light enough to spin up while keeping 50mm of speed.

Weight tier - Ultralight ~410g: the balanced middle - the sweet spot for most all-round riders.

Weight tier - Superlight ~435g: the sturdy choice - impact margin for mixed road and light gravel.

Weight tier - Standard ~475g: the durable daily build - extra grams shrug off rough surfaces.

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

Same-depth series: the wide 50mm gravel rim runs big gravel volume; the 50mm offset tubeless balances disc spoke tension.

Adjacent depth: the 40mm road/gravel rim climbs better; the 55mm road rim goes deeper on the flat.

Target Audience & Usage Notes.

Target audience.: Road racers, gran fondo riders and light-gravel adventurers.

Rim-only.

Seat beads with a compressor; respect 90 psi and 110kg.

Not for aggressive gravel or riders over 110kg.

The Ride That Awaits.

Pair it with a quality hub, run a 32-38c tubeless, and feel the wheel do everything at once: it holds speed on the flat, floats over the rough stuff, and climbs without a sigh. Light enough to dance, deep enough to fly. Free shipping, a 3-year rim warranty and crash-replacement discount - your next build starts with one click.

Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 50mm
Bead Type: Hooked
Inner Width: 26mm
Outer Width: 32mm
ERD (Effective Rim Diameter): 538mm
Weight Tier: Extreme Light 390g / Ultralight 410g / Superlight 435g / Standard 475g (+/-10-15g)
Trade-offs & Considerations
Aero vs Crosswind: 50mm depth saves about 4.5W versus a 35mm rim at 40km/h; at 10° yaw the 32mm outer width keeps steering predictable on exposed descents, at the cost of a stronger crosswind signature than a 40mm rim.
Weight vs Stiffness: The Extreme Light tier (390g) saves about 85g versus the Standard tier (475g) at the same 50mm depth (±5g); lateral stiffness holds within 3% across tiers, so the lightest layup keeps the same rim structure.
Tire-Type Trade-off: The hooked bead accepts clincher and tubeless tyres from about 31mm to 48mm on the 26mm internal width; tubeless cuts rolling resistance and pinch-flat risk but needs tape, a valve and sealant to seal the bed.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $340; 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: >40J (ISO 4210-7 reference)
Flatness: <0.25mm (internal QC)
Roundness: <0.3mm (internal QC)
Max Spoke Tension: >300kg (internal QC)
Ultimate Strength: >100kg (internal QC)
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
Gravel Racing: Fastest-growing US/EU segment — NA holds ≈40% of the global gravel market (2026); Unbound-style endurance events reward wide 26mm beds with 35-50mm tubeless at 35-50 PSI.
Mixed-Surface Adventure: Eurobike 2026 trend toward all-road and 32er builds; this 50mm gravel platform transitions from tarmac to dirt without swapping wheels.
Bikepacking / Expedition: Eurobike/Cyclingworld Europe 2026 highlights bikepacking integration; wide beds carry 40-50mm tyres at low pressure for loaded comfort on rough routes.
Compatibility
Frame: 700C (ISO 622) road/gravel frames; brake type hub-dependent
Tire Type: Tubeless-ready clincher
Tire Width: 31-48mm (min 28mm)
Valve: 6.5mm Presta
Brake: Rim-only; disc or rim brake hub per build
How It Compares
FAQ
What tyre widths fit this 26mm internal rim?
With a 26mm internal width, run 31–48mm tubeless tyres on 700C; the minimum is about 28mm. It suits road-plus and light gravel.
What is the ERD for spoke length calculations?
538mm. Use this Effective Rim Diameter when calculating spoke lengths for a custom build.
Is the rim tubeless ready?
Yes. The hooked bead mounts tubeless tyres; use tubeless tape, a valve and sealant to seal the bed.
Which brake type is compatible?
Disc brake builds only — this rim has no rim-brake braking surface.
Which weight tiers are selectable?
Extreme Light (390g), Ultralight (410g), Superlight (435g) and Standard (475g) are selectable; choose Standard or Superlight for heavier riders or rough roads.
Warranty & Shipping
Warranty Period: 3 years
Crash Replacement: 30% discount on replacement parts
Processing Time: 1–3 business days (standard stock); 7–15 business days (custom)
Estimated Delivery: 7–15 business days (standard); 3–5 business days (expedited)
View full details