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Bola EXP 50C DT Swiss 240s 50mm Carbon Wheelset Rim Brake

Bola EXP 50C DT Swiss 240s 50mm Carbon Wheelset Rim Brake

$1,111.00 USD
$1,500.00 USD $1,111.00 USD
Sale Sold out
Free shipping  |  VAT included in EU & USA
Rim Width(Int/Ext)
Freehub Body
Decal

The Bola EXP 50C is a 50mm Toray T1000 carbon rim-brake wheelset on DT Swiss 240s hubs with CX-Ray spokes, 1380g, for classic road racing and triathlon.

The rim-brake aero classic: 50mm, DT Swiss, 1380g. One of the last great rim-brake aero options, the Bola EXP 50C laces a 50mm T1000 rim (25-28mm external, 18-21mm internal) to DT Swiss 240s hubs with Sapim CX-Ray spokes — built for riders on traditional frames who still demand aerodynamic efficiency and modern tubeless readiness.

Buying Guide.

Internal width - 18mm: 25c at 90-110 PSI for smooth race tarmac.

Internal width - 21mm: 28c at 80-90 PSI for endurance road miles.

Max rider weight: rated to 110kg - check rider plus gear; rim-brake QR frames only.

Same-depth series: the sole rim-brake model in the EXP family; the ST 50C (~$860) below uses a simpler hub at the same depth.

Adjacent depth: no shallower EXP rim-brake exists - choose this 50C for aero on traditional frames.

Target Audience & Usage Notes.

Rim-brake road frames only, quick-release (9x100 front / 9x130 rear).

Max system weight 110kg.

Not compatible with disc frames, off-road, gravel or cyclocross.

The narrow 18/21mm internal bed is optimized for 25-28mm road tires.

The Ride That Awaits.

There is purity to it - the freehub spins free, the deep rim tracks true on the open road, and the quick-release clicks home like a handshake with the road. The flat rewards the depth; the climb forgives it. Free shipping and a 3-year rim / 2-year wheelset warranty mean your traditional frame deserves this swan song.

Specifications
Size: 700c
Carbon Grade: T1000 ultra-high-modulus carbon fiber
Rim Depth: 50mm
Bead Type: Hooked / Hookless
Inner Rim Width: 18/21mm
Outer Rim Width: 25-28mm
Hub Model: DT Swiss 240 36T
Spoke: Sapim CX Ray, 24/24, 2x Straight pull
Bearing Type: Ceramic bearing
Complete Wheelset Weight: 1380g (tape & valve excluded, ±2% tolerance)
Accessories: Tape, valve and spare spokes
Trade-offs & Considerations
Aero vs Crosswind: A 50mm rim-brake rim saves about 5.0W versus a 30mm rim at 40km/h and 10 deg yaw, but the narrow 18/21mm bed runs 25-28c only, so crosswind sensitivity is higher than a wide 50mm disc rim; the 40mm depth option trades about 1.5W for calmer handling.
Weight vs Stiffness: At 1380g with quick-release skewers, this set is about 80g heavier than a 50mm disc equivalent (plus or minus 5g) because the rim-brake track adds material; lateral stiffness is within 3% of a race 50mm rim.
Tire-Type Trade-off: The narrow 18/21mm internal bed is optimised for 25-28c clinchers at 80-110 PSI; it trades the comfort of 32c gravel volume for a narrow, high-pressure aero road tyre.
Sourcing & Delivery Trade-off: Stock builds ship in 1-3 business days at $1,111; custom decals add 7-15 business days and about a $100-150 premium.
Config Ladder: This rim-brake set uses steel CX-Ray spokes and ceramic bearings; moving to a disc-brake carbon-spoke build saves about 100g for roughly +$110, but rim-brake frames cannot be converted.
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: 122–136 N/mm (internal lab)
Lateral Stiffness: 42–51 N/mm
Max System Weight: 120kg
Recommended Use Cases
Road Racing Builds: 2026 peloton standard is 28-30mm tubeless on wide rims (TdF 2026 avg ≈30mm); 50mm section suits 40+ km/h racing.
Gran Fondo / Endurance: Modern 2026 frames (Propel, SuperSix, S5) design around 30-32mm clearance; 21mm inner bed pairs 25-32mm tubeless per ETRTO 2026 guidance.
Wheel Building: Custom road builds with disc or rim hubs; UD carbon layup options for weight-conscious or durable builds.
Weight Tier Selection: Offered in weight tiers (110kg); lighter for climbing, heavier for training and impact margin.
Compatibility
Brake Standard: Rim brake, machined carbon track (carbon-specific pads)
Axle: Quick release 9x100 front / 9x130 rear
Freehub: Shimano HG (select at checkout)
Tire: Tubeless-ready clincher, 25-32mm
Frame: Rim-brake road frame with QR dropouts only (not disc)
How It Compares
ModelHubSpokeBearingWeightDepthWidthPrice
EXP 50C 36T ratchet, 10 deg engagement Sapim CX-Ray, 24/24, 2-cross Ceramic 1380g 50mm 25-28mm See store
Model A 66T ratchet, 5.5 deg engagement Sapim CX-Ray Steel cartridge ~1630g 50mm 23mm $2,663
Model B 3-pawl, 24T, 15 deg engagement Pillar 1420 Steel ~1490g 50mm 25mm $1,049
Model C 36T ratchet, 10 deg engagement Pillar 1420 Ceramic ~1450g 50mm 28mm $739
FAQ
How does the carbon brake track handle heat on long descents?
Carbon brake tracks run cooler and hold braking performance better than alloy rims under sustained braking, so long alpine descents stay consistent. Use carbon-specific brake pads to protect the track — alloy-rim pads can glaze the surface.
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.
Which tyres should I run, and at what pressure?
On the 18mm bed run 25c at 90-110 PSI; on the 21mm bed run 28c at 80-90 PSI. Optimised for 25-28c road tyres.
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
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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