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Bola ULT 50R Carbon Aero Wheelset Disc brake

Bola ULT 50R Carbon Aero Wheelset Disc brake

$698.00 USD
$780.00 USD $698.00 USD
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Rim Width(Ext/Int)
Freehub Body
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The Bola ULT 50R Carbon Aero Disc Wheelset - a 50mm aero road/gravel set with Sapim CX-Ray spokes and a TPI-ceramic BL100 hub, built in Toray T1000 unidirectional carbon.

Clip in and feel the difference on a long group ride or a mixed-surface adventure: the Bola ULT 50R blends a 50mm aero rim with a light ~1280g set weight to help you maintain speed with less effort. Tubeless-ready and engineered to balance acceleration, stability, and long-ride comfort.

Buying Guide.

Internal width - 21mm: run a 28mm tire at 75-90 PSI for smooth tarmac.

Internal width - 24mm: cup a 30-32mm tire at 65-80 PSI for mixed roads.

Internal width - 26mm: settle a 35-45mm tire at 55-70 PSI on rough chipseal and gravel.

Max rider weight: rated to 120kg system - check rider and gear before ordering.

Same-depth series: the ELT 50R at $579 uses Pillar spokes, the SL 50R at $789 moves to DT Swiss 350, and the PRM 50R at $888 uses carbon blade spokes - choose this ULT for the CX-Ray ceramic mid-premium pick.

Adjacent depth: the ULT 40R climbs easier and the ULT 60R goes faster on flats - this 50R is the balanced aero all-rounder.

Target Audience & Usage Notes.

For riders splitting road and gravel who want one versatile aero set.

Not for heavy loaded touring or extreme off-road.

Requires a disc frame with thru-axle or QR.

Max system weight 120kg.

The Ride That Awaits.

A fast rolling race rewards it on every false flat - the mid-depth rim carries you over the rollers without gust sensitivity, and the bladed spokes hold a firm line through the bunch sprint. Wide tubeless rubber keeps the long day comfortable. Free shipping, VAT included, and a 24-month limited global warranty with 30% crash-replacement cover mean one aero set answers every ride you plan.

Specifications
Size: 700c
Carbon Grade: Toray T1000 ultra-high-modulus carbon fiber
Rim Depth: 50mm
Bead Type: Hooked / Hookless
Inner Rim Width: 21mm / 24mm / 26mm options
Outer Rim Width: 28mm / 30mm / 32mm
Hub Model: BL 100 54T
Spoke: Sapim CX Ray, 2x Straight pull
Spoke Count: 24/24
Bearing Type: TPI Ceramic bearing
Complete Wheelset Weight: 1280g (tape & valve excluded, ±2% tolerance)
Accessories: Tape, valve and spare spokes
Trade-offs & Considerations
Aero vs Crosswind: The 50mm rim saves about 4.5W versus a 35mm training wheel at 40km/h, but at 10° yaw on exposed descents the steering gets noticeably lively; dropping to the 45R gives up about 1.5W of aero for calmer, more predictable handling.
Weight vs Stiffness: T1000 carbon and Sapim CX-Ray spokes bring the set to about 1280g (±5g), roughly 30g lighter than the T800 Pillar-spoke ELT 50R at the same 50mm depth, while lateral stiffness stays within 3%.
Tire-Type Trade-off: The hooked / hookless bed runs 25–50c tubeless: 21mm internal for a 28mm tyre at 75–90 PSI, 24mm for 30–32mm at 65–80 PSI, 26mm for 35–45mm at 55–70 PSI; the wider beds trade a little aero for comfort on rough tarmac.
Sourcing & Delivery Trade-off: Stock builds ship in 1–3 business days at $698; a custom width, freehub or quick-release spec adds 7–15 business days and roughly a $60–100 premium.
Config Ladder: TPI ceramic bearings and the 54T ratchet (6.7° engagement) are already standard; moving to the 26mm internal bed adds about 30–50g for wider tyres, while stepping up to the 60R rim adds about 110g and ~1.5W of aero.
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: 122–136 N/mm (internal lab)
Lateral Stiffness: 42–51 N/mm
Spoke Tension (Drive Side): >130 kgf (factory assembly tension)
Max System Weight: 120kg
Recommended Use Cases
Road Racing: The 50mm T1000 section is the aero sweet spot of the ULT line at 1280g; Sapim CX-Ray bladed spokes keep drag low on flat stages at 40+ km/h.
Time Trial / Triathlon: 50mm is a versatile TT depth; the 21mm internal bed runs a 28mm tubeless at 80-95 PSI against the clock.
Criterium / Sprinting: The 54T ratchet hub (6.7 degrees engagement) and TPI ceramic bearings respond instantly to crit surges.
Gran Fondo / Light Gravel: Choose the 26mm internal bed for 30-32mm tubeless, covering endurance miles and light gravel on one wheelset.
Compatibility
Brake Standard: Disc brake, Center Lock rotor (140/160mm)
Axle: 12x100 / 12x142 thru-axle or QR
Freehub: Shimano HG / SRAM XDR (select at checkout)
Tire: Tubeless-ready clincher, 25-50mm
Frame: 700C disc road / light gravel frames
How It Compares
ModelHubSpokeBearingWeightDepthWidthPrice
ULT 50R 54T ratchet, 6.7° engagement Sapim CX-Ray, 24/24, 2x straight-pull Ceramic 1280g 50mm 28/30/32mm See store
Enve SES 4.5 Pro ENVE Innerdrive Pro Alpina carbon 24F/24R Ceramic 1295g 49F/55R 23.5mm $3,750
Roval Rapide CLX III Roval (DT 180) Roval carbon 18F/24R Ceramic (SINC) 1305g 51F/48R 21mm $1,499
Zipp 404 Firecrest Zipp ZR1 Sapim CX-Sprint 24F/24R Steel cartridge 1559g 58mm 23mm $1,000
FAQ
How does this 50mm deep rim handle crosswinds on fast descents?
An optimised 50mm profile keeps steering torque predictable at 10°–15° yaw, so high-speed descents stay planted.
Do these rims accept standard clincher tyres, and what is the pressure limit on hookless?
Hooked rims fit standard clincher tyres directly, with or without tubes. For hookless rims, per ETRTO, tubeless tyres 28c and wider must not exceed 72.5 PSI (5.0 bar) to prevent unseating.
Are ceramic bearings durable in rain or rough conditions - do they need frequent service?
The bearings use dual-lip contact labyrinth dust/water seals. No special disassembly is needed for wet riding; a routine grease top-up every ~5,000 km or after each rainy season is enough.
Which tyres should I run, and at what pressure?
On the 21mm bed run a 28mm tyre at 75-90 PSI; the 24mm bed suits 30-32mm at 65-80 PSI; the 26mm bed runs 35-45mm at 55-70 PSI tubeless.
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: 2 years
Crash Replacement: 30% discount on replacement parts within 1 year of the original purchase date
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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