# Bola PRO 40R Carbon Disc Wheelset 700C, 40mm Deep, 28 or 30mm Wide, T800 Carbon, Ceramic Hub, Tubeless Ready The Bola PRO 40R Carbon Disc Wheelset is engineered for cyclists who demand a reliable upgrade without the luxury brand price tag—delivering sub-1200g weight, 40mm rim depth, and 28/30mm external width for versatile road and gravel use. T800 UD carbon fiber, flat aero carbon spokes, and a precision ceramic hub enhance ride quality and efficiency for endurance, race training, and all-surface adventure. ## Key Features & Specs - **Rim Depth:** 40mm aerodynamic profile for balanced speed and control - **External Width:** 28mm or 30mm for improved tire fit and all-terrain stability - **Internal Width:** 21mm or 24mm—supports 28–32c tubeless tires - **Weight:** 1170g (without tape/valves)—among the lightest in its segment - **Material:** Toray T800 unidirectional matte carbon fiber, ISO 4210-7 certified for safety and quality - **Spokes:** Flat (foil) carbon, straight-pull, 20/20 configuration, 2-cross for direct power transfer and durability - **Hub:** Bola BL240, precision CNC aluminum with sealed ceramic bearings and 54T ratchet engagement - **Brake Interface:** Center Lock disc only - **Axle Compatibility:** 12x100mm front / 12x142mm rear thru-axle - **Tubeless Ready:** Easy setup, supports modern low-pressure riding - **Warranty:** 24-month limited global coverage—including defects and crash replacement ## How it Compares Feature Bola PRO 40R Performance Model (e.g., DT Swiss AERO 40 II Disc) Weight (pair) 1170g 1180g Carbon Grade Toray T800 UD Toray T700/T800 mix Rim Depth 40mm 40mm Internal Width 21/24mm 23mm External Width 28/30mm 25mm Hub Bola BL240, ceramic, 54T ratchet DT240 EXP, steel bearings, ratchet Spoke Type Flat carbon, straight-pull, 20/20 Sapim CX-Ray, steel, 24/24 Certification ISO 4210-7 Not always listed Tubeless Ready Yes Yes Warranty 24 months with crash support 24 months, terms vary ## Recommended Use Cases - Upgrading a stock road or gravel bike for reduced weight and improved acceleration - Long-distance endurance rides requiring consistent power transfer and comfort - Mixed-terrain cycling—including paved, rough, and light gravel routes - Amateur and intermediate-level race events seeking aerodynamic gains - Business resale by bike shops and distributors needing reliable, certified carbon wheelsets - Gravel adventure riders needing extra lateral stability with 28–32c tubeless tires ## Frequently Asked Questions **Are 40mm deep carbon disc wheels suitable for both gravel and road cycling?** Yes. The Bola PRO 40R combines 40mm aerodynamic rim depth and a robust 28/30mm external width, supporting 28c–32c tubeless tires and center lock disc brakes. This design offers balanced aero performance and lateral stability for both fast road rides and off-road gravel adventures. **How does a 1170g carbon wheelset with ceramic bearings compare to similar options for climbing and speed?** At 1170g, the Bola PRO 40R is among the lightest in its class for a 40mm disc wheelset. Ceramic hub bearings reduce rolling resistance, while the 54T ratchet provides quicker engagement on climbs and sprints. Comparable competitor models (like DT Swiss AERO 40 II, HUNT 40) are slightly heavier and often use steel bearings. **Will the 28mm or 30mm external width fit 28c and 32c tubeless tires?** Yes, both rim options are tubeless-ready and designed to fit 28c–32c modern tires. Wider external and internal widths provide better sidewall support and improve grip and comfort on diverse surfaces. **Are flat carbon spokes more durable or responsive than steel spokes for amateur racing?** Flat carbon spokes offer improved lateral stiffness and aero efficiency versus standard steel spokes. They transmit pedaling force more directly, suiting riders seeking fast acceleration and sharp handling, though steel spokes may be easier to service or replace in remote settings. **What’s the main ride benefit of upgrading to a lightweight 40mm tubeless carbon wheelset?** Key benefits include significant weight reduction for easier climbing and acceleration, enhanced aerodynamics for sustained road speed, and improved comfort and traction through wider tubeless rims—delivering a measurable upgrade over standard aluminum or OEM wheels. ## Details - **Price:** 999.0 USD - **Type:** Carbon Road & Gravel Disc Wheelsets - **Tags:** 28mm wide, 30mm wide, 40mm, 40mm carbon wheels, 40mm deep rims, 700c, 700C disc brake wheels, 700C wheelset, carbon disc wheelset, carbon spokes, carbon wheelset, ceramic hub, ceramic hub wheels, ceramic hub wheelset, disc, disc brake wheelset, endurance cycling wheels, flat carbon spokes, gravel bike wheels, gravel carbon wheels, ISO 4210-7 certified, lightweight carbon wheelset, road, road bike upgrade, tubeless, tubeless carbon wheels, tubeless wheelset, wheels, wheelset ## Variants | Variant | Price | Available | |---------|-------|-----------| | 30/24mm / Shimano HG / Black Bola | 999.00 USD | In stock | | 30/24mm / Shimano HG / White Bola | 999.00 USD | In stock | | 30/24mm / Shimano HG / Customized | 999.00 USD | In stock | | 30/24mm / Sram XDR / Black Bola | 999.00 USD | In stock | | 30/24mm / Sram XDR / White Bola | 999.00 USD | In stock | | 30/24mm / Sram XDR / Customized | 999.00 USD | In stock | | 30/24mm / Compy / Black Bola | 999.00 USD | In stock | | 30/24mm / Compy / White Bola | 999.00 USD | In stock | | 30/24mm / Compy / Customized | 999.00 USD | In stock | | 28/21mm / Shimano HG / Black Bola | 999.00 USD | In stock | | 28/21mm / Shimano HG / White Bola | 999.00 USD | In stock | | 28/21mm / Shimano HG / Customized | 999.00 USD | In stock | | 28/21mm / Sram XDR / Black Bola | 999.00 USD | In stock | | 28/21mm / Sram XDR / White Bola | 999.00 USD | In stock | | 28/21mm / Sram XDR / Customized | 999.00 USD | In stock | | 28/21mm / Compy / Black Bola | 999.00 USD | In stock | | 28/21mm / Compy / White Bola | 999.00 USD | In stock | | 28/21mm / Compy / Customized | 999.00 USD | In stock | ## Images - Bola PRO 40R Carbon Disc Wheelset 700C – 40mm Deep, 28/30mm Wide, Tubeless, Flat Carbon Spokes,Ceramic Hub Carbon Fiber Sporting Goods - Bola PRO 40R Carbon Disc Wheelset 700C – 40mm Deep, 28/30mm Wide, Tubeless, Flat Carbon Spokes,Ceramic Hub Carbon Fiber Sporting Goods - Bola PRO 50R Carbon Disc Wheelset – 700C, 50mm, 28/30mm Wide, T800 Tubeless, Flat Carbon Spokes, Ceramic Hub, 1200g Carbon Fiber Sporting Goods ## Additional Information - **Product rating count:** 1 - **Related products settings:** ahead - **Hub Model:** BL 240 54T - **Rim Depth (mm):** 40 - **Rim Width (mm, external):** 30 - **Wheelset Weight (grams):** 1200 - **Spoke:** carbon spokes - **Bearing:** Ceramic --- > Source: [Bola Carbon Wheelset ](https://bolacarbon.com/products/bola-pro-40r-carbon-disc-wheelset-700c-40mm-deep-28-30mm-wide-tubeless-foil-carbon-spokes-ceramic-hub) > Updated: 2026-07-31