700C 50mm Carbon UV Profile Rim 23mm Inner Wide | Bola
700C 50mm Carbon UV Profile Rim 23mm Inner Wide | Bola
Regular price
$310.00 USD
Regular price
$350.00 USD
Sale price
$310.00 USD
Free shipping | VAT included in EU & USA
Quantity
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The Bola 700C 50mm UV-profile carbon road rim - a 50mm aero disc rim with 23mm internal width in Standard/Superlight/Ultralight layups, for road racing and endurance.
A 50mm silhouette that splits the difference between aero speed and all-road sense - deep enough to cheat the wind, calm enough for everyday miles.
Buying Guide.
Weight tier - Standard ~520g (Heavy): durable value for heavier riders and year-round training.
Weight tier - Superlight ~490g (Midweight): the balanced pick, shedding ~30g for regular racers.
Weight tier - Ultralight ~460g (Midweight): the climber's and racer's pick, trimming ~60g over Standard.
Internal width - 23mm: 28-32mm at ~70-95 PSI for aero road; 28mm is the sweet spot.
Same-depth series: the 50mm 34/28mm rim ($310) runs a wide gravel-friendly bed; the 50mm tubular rim ($310) is glued-tyre race kit.
Adjacent depth: the 40mm 23mm UV rim ($310) climbs better; the 60mm 23mm rim ($310) adds flat aero.
Target Audience & Usage Notes.
road racers, gran fondo riders and wheel builders on disc road frames. 20/20 drilling, custom nipple angles.
Rider limit 120kg.
Not for steep climbing-only days or rim-brake bikes.
The Ride That Awaits.
Build it fast and the rim holds a composed line over rolling terrain, the UV finish gleaming as you pass through.
It feels unflappable - deep enough for aero, calm enough for daily abuse.
Free shipping and a 3-year rim warranty round out a versatile workhorse.
Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 50mm
Bead Type: Hooked
Inner Width: 23mm
Outer Width: 30-34mm
ERD (Effective Rim Diameter): 538mm
Weight Tier: Standard, Superlight, Ultralight
Trade-offs & Considerations
Aero vs Crosswind: The 50mm UV toroidal profile saves about 4.5W versus a 35mm rim at 40km/h; at 10° yaw the narrow 23mm inner width (30–34mm outer) keeps the front end calm — a traditional aero set-up, still more crosswind than a 40mm rim.
Weight vs Stiffness: The Ultralight tier (about 460g) saves about 60g versus the Standard tier (about 520g) at the same 50mm depth (±5g); lateral stiffness holds within 4% across tiers, though the lightest layup trades some impact resistance.
Tire-Type Trade-off: The hooked, hookless-compatible bed runs 25–32mm road tyres and is rated to 125psi; tubeless needs tape, a 6.5mm valve and sealant, clinchers mount directly.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $310; a custom spoke-hole count, nipple angle or private labelling 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: >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. The 50mm depth provides aerodynamic efficiency for high-speed sprints and short bursts.
Triathlon / TT: Excellent. Aero profile reduces drag at sustained speeds.
Road Racing: Good. Versatile enough for most road races, especially with the lighter weight grade.
Gran Fondo / Endurance: Suitable. Deep section may feel heavy on long climbs, but tubeless wider tires add comfort.
Climbing / Hill Repeats: Not recommended. 50mm depth adds weight and crosswind sensitivity; consider a shallower rim for pure climbing.
Not Recommended For: Technical descents in strong crosswinds may be challenging; also not ideal for rough gravel.
Compatibility
Frame Compatibility: Compatible with road frames designed for disc brakes. Ensure hub axle spacing matches frame (typically 12x100 front, 12x142 rear).
Tire Type: Tubeless-compatible, clincher (hookless)
Tire Width Range: 27-40mm
Brake Standard: Disc brake only (no rim brake surface)
Drivetrain: Compatible with standard road groupsets (Shimano, SRAM, Campagnolo) via freehub choice
Rotor Standard: Compatible with disc brake rotors (mount type per hub, e.g., center lock or 6-bolt)
How It Compares
| Model | Weight | Depth | Width | Price |
|---|---|---|---|---|
| 700C 50mm Rim 30/34mm | Standard, Superlight, Ultralight | 50mm | 30–34mm | See store |
| Model A | ~430g | 50mm | 28mm | $1,399 |
| Model B | ~430g | 50mm | 27mm | $249 |
| Model C | ~420g | 50mm | 30mm | $389 |
FAQ
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.
How does a deep-section rim handle crosswinds — will steering get pulled around?
An optimised profile keeps steering torque predictable at 10°–15° yaw, so high-speed descents stay planted even on deep-section builds.
What tyres can I mount on this rim, and what pressure should I run?
The 23mm inner width supports tyres from 25mm to 32mm; wider 28–32mm tyres add comfort and grip, while 25–28mm are more aero.
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
