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BOLA 32er 45mm Carbon Road & Gravel Rim | 38mm Wide

BOLA 32er 45mm Carbon Road & Gravel Rim | 38mm Wide

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Regular price $310.00 USD
Regular price $350.00 USD Sale price $310.00 USD
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Bola 32in (696mm) 45mm asymmetric U carbon rim, 38/32mm, ERD 612mm, 445-530g, tubeless.

The 32in Aero Wide

A 45mm asymmetric U rim—38mm external, 32mm internal—on a 32-inch (ISO 696mm BSD) platform. Toray T700 UD carbon; ERD 612mm.

Buying Guide.

Weight tier - Light ~445g: for endurance riders who want a lively wide gravel build without a tank-like feel.

Weight tier - Durable ~530g: choose it for rough chipseal, loaded mixed-surface days and larger riders who want impact margin.

Internal width - 32mm: this is a wide bed built for fat gravel rubber; run the widest tire you have for comfort, the narrowest the course allows for speed.

Adjacent depth - on this wide platform the shallower builds favor climbing; this section trades a little acceleration for stability and all-day comfort.

Target Audience & Usage Notes.

Endurance road, gravel, mixed-surface.

Not heavy off-road.

The Ride That Awaits.

String it between your fingers and spin it: a wide, calm rim that swallows 37-52mm rubber and turns rough tarmac into a boulevard. Stand on the pedals and it accelerates without a whimper, the wide bed purring over surfaces that would bruise a narrower wheel. Rated to a real system weight, tubeless-ready and backed by a 3-year warranty with free shipping - order it and watch the miles fly.

Specifications
Size: 32er
Material: Genius Toray carbon fiber
Rim Depth: 45mm
Bead Type: Hooked
Inner Width: 32mm
Outer Width: 38mm
ERD (Effective Rim Diameter): TBD
Weight Tier: 445-530g
Trade-offs & Considerations
Aero vs Crosswind: The 45mm depth saves about 4.0W versus a 35mm rim at 40km/h; the 38mm outer width broadens the tyre bed but raises the crosswind signature versus a 30mm rim, so it favours flatter, faster rolling courses over very exposed twisting descents.
Weight vs Stiffness: The lightest 445g layup saves about 85g versus the 530g option at the same 45mm depth (±5g); the asymmetric U-profile balances spoke tension and lateral stiffness holds within 5% across the layup range.
Tire-Type Trade-off: The hooked bead accepts 28-32c clincher and tubeless tyres and supports higher pressure than hookless; tubeless cuts rolling resistance but needs tape, valve and sealant to seal the bed.
Sourcing & Delivery Trade-off: Stock drilling ships in 1-3 business days at $310; a custom spoke-hole count or decals add 7-15 business days and a roughly $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: 90–110 N/mm (internal lab)
Lateral Stiffness: ≥8N/mm
Max System Weight: 110kgs
Recommended Use Cases
Climbing / Hill Repeats: Suitable
Gran Fondo / Endurance: Excellent
Road Racing: Good
Sprinting / Criterium: Suitable
Training / Daily Riding: Excellent
Not Recommended For: Not recommended for heavy off-road or downhill disciplines
Compatibility
Frame Compatibility: 32er Road and gravel frames with disc brake mounts
Tire Type: Tubeless and clincher
Tire Width Range: 37-52mm
Brake Standard: Disc brake (6-bolt and Centerlock compatible)
Drivetrain: Depends on hub (not determined by rim)
Rotor Standard: 6-bolt or Centerlock
How It Compares
FAQ
What tyre widths fit this rim?
With a 32mm internal width, run 28-32c clincher or tubeless tyres; the sweet spot is 30c for road and all-road gravel.
How do I set it up tubeless?
Use tubeless tape, a Presta valve and sealant; mount a tubeless-ready tyre, inflate to seat the bead, then top up sealant through the valve.
How much weight do I save versus an alloy rim?
At 445-530g versus a typical 600g+ alloy rim of similar depth, you save roughly 150-200g per wheel.
Which brake type is compatible?
Disc brake builds only - this rim has no rim-brake braking surface.
What is the BSD for spoke builds?
The rim uses a 696mm BSD; confirm the exact ERD with your builder before cutting spokes.
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)
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