700C Tubeless Carbon Rim 45mm Asymmetric 32mm Wide | Bola
700C Tubeless Carbon Rim 45mm Asymmetric 32mm Wide | Bola
Regular price
$340.00 USD
Regular price
$400.00 USD
Sale price
$340.00 USD
Free shipping | VAT included in EU & USA
Quantity
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A 45mm offset/asymmetric carbon rim with 38/32mm widths for 37–52mm tires, tubeless-ready, and four weight tiers for road and gravel endurance.
Wide-Bed Endurance Platform
The BOLA 45mm asymmetric rim shifts the spoke anchor 2–3mm drive-side to equalise tension. Its 38mm outer and 32mm inner width supports 37–52mm tubeless tires for comfort and traction on mixed-surface endurance rides.
Buying Guide.
Weight tier - Extreme Light ~390g: sub-90kg climbers on smooth tarmac.
Weight tier - Ultralight ~410g: the race-day sweet spot.
Weight tier - Superlight ~445g: all-day gran fondo, durable enough for rough roads.
Weight tier - Normal ~470g: riders over ~90kg and heavy miles; the beefiest choice.
Internal width - 32mm: an extra-wide bed for 37-52mm tires; choose it when comfort and traction matter more than raw speed.
Adjacent depth - the offset evens tension; the narrower Bola beds favor pure road speed, this one favors mixed surfaces.
Target Audience & Usage Notes.
Endurance and gran fondo riders, all-road gravel explorers, and custom wheelset builders.
Not for aggressive off-road or mountain biking.
The Ride That Awaits.
Roll out at dawn on a mixed-surface day and feel the wide, offset bed settle under you - 37-52mm tires at low pressure eating chipseal and dirt alike, the stiff carbon whispering rather than complaining. It is endurance, made comfortable. Free shipping and a 3-year warranty mean the gran fondo is one order away.
Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 45
Bead Type: Hooked
Inner Width: 32
Outer Width: 38
ERD (Effective Rim Diameter): 548
Weight Tier: Normal (470±15g), Superlight (445±15g), Ultralight (410±10g), Extreme Light (390±10g)
Trade-offs & Considerations
Aero vs Crosswind: 45mm depth saves about 3.5W versus a 32mm rim at 40km/h, but the wide 38mm outer section raises the crosswind signature at 10° yaw; the offset drilling trues up spoke tension for the disc side rather than calming the wind.
Weight vs Stiffness: The Extreme Light tier (390g) saves about 80g versus the Normal tier (470g) at the same 45mm depth (±5g); lateral stiffness stays within 3% across tiers, but the lightest layup suits riders under 90kg and smooth roads.
Tire-Type Trade-off: The 32mm internal width accepts 40c–50c gravel and 28–32c road tubeless tyres; the wide bed lowers rolling resistance at lower pressure, while the hooked bead still supports higher pressures than a hookless design.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $340; custom spoke-hole count, 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: >200 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: 110kgs
Recommended Use Cases
Climbing / Hill Repeats: Good: Moderate weight and depth offer a balance; choose lighter weight tier for best climbing performance.
Gran Fondo / Endurance: Excellent: Wide inner width and tubeless compatibility provide comfort and traction for long rides.
Road Racing: Good: Aero profile and stiffness suit racing, though not as aero as deeper rims.
Sprinting / Criterium: Suitable: Stiffness is adequate, but deeper rims offer more aero advantage for sprints.
Training / Daily Riding: Excellent: Durable options and tubeless seal reduce puncture risk for daily use.
Not Recommended For: Not recommended for aggressive off-road or mountain biking due to road-focused design.
Compatibility
Frame Compatibility: Compatible with 700C road and gravel frames designed for disc brakes, though brake type is not specified.
Tire Type: Tubeless-ready clincher tires.
Tire Width Range: 37-52mm
Brake Standard: Not specified; likely disc.
Drivetrain: Compatible with 11- or 12-speed drivetrains.
Rotor Standard: N/A (rim only)
How It Compares
| Model | Weight | Depth | Width | Price |
|---|---|---|---|---|
| 700C 45mm Rim 38mm | Normal (470±15g), Superlight (445±15g), Ultralight (410±10g), Extreme Light (390±10g) | 45mm | 38mm | See store |
| Model A | ~430g | 50mm | 28mm | $1,399 |
| Model B | ~430g | 50mm | 27mm | $249 |
| Model C | ~420g | 50mm | 30mm | $389 |
FAQ
Which tyres suit the 32mm internal width?
The 32mm internal width is tuned for 35–45c road and gravel tyres, where the asymmetric profile balances spoke tension for disc braking.
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 is the maximum spoke tension for this rim?
Drive-side / disc-side max tension is 130–140 kgf, with the non-drive side adapted to match; spoke holes are locally reinforced inside the carbon layup to prevent pull-out cracking.
Will the rim crack on rock gardens or bottom-outs at low pressure?
The rim bead area uses a thickened impact-reinforced layer; impact testing passes >60J extreme impacts (above the ISO 30J standard). An inner width of 32mm accepts wider tyres, which deform to absorb shock at low pressure.
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, 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
