Bola EXT 45R 700C Carbon Spoke Wheelset
Bola EXT 45R 700C Carbon Spoke Wheelset
Regular price
$1,111.00 USD
Regular price
$1,250.00 USD
Sale price
$1,111.00 USD
Shipping calculated at checkout.
Quantity
Couldn't load pickup availability
The Bola EXT 45R is a 45mm T1000 UD carbon road disc wheelset on a BL180 54T ceramic hub with Hyper carbon spokes, 1170g, for lightweight mixed-terrain performance.
The featherweight road blade: 45mm, 1170g, ceramic. The Bola EXT 45R takes a 45mm T1000 matte rim (28-30mm external, 21-24mm internal) and pairs it with a BL180 CNC aluminum hub, TPI ceramic bearings and Hyper carbon aero spokes — a road-oriented lightweight wheelset that still bridges to light gravel.
Buying Guide.
Internal width - 21mm: 28c at 80-90 PSI for smooth tarmac.
Internal width - 24mm: 32c at 70-80 PSI for rolling road.
Max rider weight: rated to 110kg - check rider plus gear.
Same-depth series: the EXP 45R (~$999) keeps a genuine DT Swiss 240s hub and the CE 45R (~$1111) pairs DT ratchet with foil spokes; the EXT 45R is the featherweight ceramic pick.
Adjacent depth: the EXT 40R below is the climbing all-rounder - choose the 45R for aero, the 40R for hills.
Target Audience & Usage Notes.
Disc-brake road and gravel frames, 12x100/12x142 thru-axle.
Max system weight 110kg.
Ceramic bearings need cleaning every ~6 months/5000 miles; Hyper carbon spokes are less impact-tolerant.
The 28-32c range is road-focused.
Not for heavy off-road.
The Ride That Awaits.
Take it off the rack and the difference is immediate - a statement in grams that you feel first on every attack. The flat holds your pace, the gusts hold no sway, the ceramic hub turns like a whisper. Free shipping and a 3-year rim / 2-year wheelset warranty mean the climb is about to feel lighter.
Specifications
Size: 700c
Carbon Grade: Toray T1000 ultra-high-modulus carbon fiber
Rim Depth: 45mm
Bead Type: Hooked / Hookless
Inner Rim Width: 21/24mm
Outer Rim Width: 28-30mm
Hub Model: BL 180 54T
Spoke: hyper carbon, 2x, Straight pull
Spoke Count: 20/20
Bearing Type: TPI Ceramic bearing
Complete Wheelset Weight: 1130g (tape & valve excluded, ±2% tolerance)
Accessories: Tape, valve and spare spokes
Trade-offs & Considerations
Aero vs Crosswind: The 45mm aero profile saves about 4.0W versus a 35mm road rim at 40km/h; at 10° yaw the 28–30mm outer width stays reasonably calm on tarmac, and stepping to the 50R adds about 1.5W more aero for noticeably more side-steer.
Weight vs Stiffness: T1000 carbon and hyper carbon spokes hit 1130g, about 160g lighter than a steel-spoke 45mm disc build (±5g), with lateral stiffness within 3%; the 20/20 straight-pull lacing feels precise but firmer over road buzz.
Tire-Type Trade-off: The hooked bed runs clincher or tubeless from 28c to 47c; the 21/24mm internal bed favours 28–32c road at 70–90 PSI, and hookless-rated tyres cap around 72 PSI.
Sourcing & Delivery Trade-off: Stock builds ship in 1–3 business days at $1111; custom decals or lacing add 7–15 business days and roughly a $100–150 premium.
Config Ladder: This set already runs TPI ceramic bearings and hyper carbon spokes; the main ladder is the internal width (21→24mm, about +5g for wider aero and comfort) and the hub (BL 180 → DT Swiss 240 for global serviceability, roughly +$200 and +5 days).
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: 122–136 N/mm (internal lab)
Lateral Stiffness: 42–51 N/mm
Spoke Tension (Drive Side): >130 kgf (factory assembly tension)
Max System Weight: 110kg
Recommended Use Cases
Climbing / Ultralight Build: At 1130g with hyper carbon spokes, this is the lightest EXT build; T1000 carbon and a 54T ratchet (6.7 degrees engagement) make it a climber's race wheelset.
Road Racing / Aero: The 45mm depth holds flat-stage speed; the wide 24-28mm internal beds shape 28-32c tubeless for low drag.
Gran Fondo / Endurance: Choose the 28mm internal bed for 32-36c at lower pressure, pairing aero with all-day comfort.
All-Road / Light Gravel: The 28mm bed runs 36-42c tubeless, so the wheelset handles light gravel sectors between road rides.
Compatibility
Brake Standard: Disc brake, Center Lock rotor (140/160mm)
Axle: Front 12x100mm thru-axle; Rear 12x142mm thru-axle (QR with adapters)
Freehub: Shimano HG / SRAM XDR (select at checkout)
Tire: Tubeless-ready clincher, 28-32c
Frame: 700C road / light-gravel disc frame
How It Compares
| Model | Hub | Spoke | Bearing | Weight | Depth | Width | Price |
|---|---|---|---|---|---|---|---|
| EXT 45R | 54T ratchet, 6.7° engagement | Hyper carbon, 20/20, 2x straight-pull | Ceramic | 1130g | 45mm | 28–30mm | 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
Can a damaged carbon spoke be replaced at a local bike shop?
Yes. The spokes use a mechanical two-piece lock-up design (not a bonded one-piece), and spare carbon spokes ship free with the wheelset. Any shop mechanic with a standard truing stand can swap a single spoke in about 10 minutes - no factory return needed.
Will carbon spokes snap suddenly in crosswinds or under lateral load?
Carbon spokes deliver ~3,800N tensile strength (above the ~3,000N of top steel spokes) with ~30% higher lateral stiffness. Potholes, sprinting out of the saddle and everyday riding carry no metal-fatigue fracture risk.
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 28c road at 80-90 PSI; on the 24mm bed run 32c at 70-80 PSI. Tubeless ready.
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
