# Bola SL 40R Carbon Disc Wheelset 700C – 40mm Deep, 28/30mm Wide, DT Swiss 350s Hub, 1320g The Bola SL 40R Carbon Disc Wheelset offers a 40mm deep T800 UD matte carbon fiber rim for a balance of aerodynamic efficiency and crosswind stability, making it suitable for both road and gravel riding with 28–32c tire compatibility. The DT Swiss 350s hub features a 36T ratchet for rapid engagement and reliable power transfer, while Sapim CX-Ray spokes maintain strength and reduce rotational weight. Certified to ISO 4210-7 and REACH standards, this 1320g wheelset meets professional durability and safety requirements for competitive endurance and advanced performance. ## Technical Specifications - **Rim Depth:** 40mm - **Rim Width:** Internal 21/24mm, External 28/30mm - **Material:** T800 UD matte carbon fiber - **Hub:** DT Swiss 350s, 36T ratchet, Center Lock, 12x100/12x142mm thru-axle/QR - **Weight:** 1320g (excluding tape and valves) - **Spokes:** Sapim CX-Ray, straight-pull, 24/24 2-cross - **Tire Compatibility:** Tubeless & clincher, 28–32c optimized - **Certifications:** ISO 4210-7, REACH compliant ## Situational Fit & Use - **Road and Gravel:** Optimized rim shape provides efficiency on tarmac and control on hardpack or mixed surfaces. - **Endurance & Racing:** 1320g combined weight aids in both climbing and sustained speed; wide profile supports traction and comfort at lower pressures. - **Customization:** Choice of internal rim widths (21/24mm) and external widths (28/30mm) allows fitment for diverse cycling setups. ### Comparison Table Model Depth (mm) Weight (g) Hub Internal Width (mm) Tire Range (c) Certifications **Bola SL 40R** 40 1320 DT Swiss 350s 36T 21/24 28–32 ISO 4210-7, REACH HUNT 40 Carbon Disc 40 1451 Ratchet System 21 25–35 — AERO 40 II Disc 40 1177 D91 45T 23 28–32 — ## Frequently Asked Questions **Are 40mm deep carbon disc wheels good for both road and gravel riding?** Yes. The 40mm depth and wide external profile provide balanced aerodynamics and stability, making them suitable for both fast road sections and variable gravel terrain. **How does a 1320g carbon wheelset with DT Swiss 350s hubs compare to others at this price?** At 1320g, this wheelset is lighter than many competitors in its segment. DT Swiss 350s hubs are recognized for reliability and quick engagement, offering dependable performance for both racing and training. **What's the benefit of Sapim CX-Ray spokes for carbon bicycle wheels?** Sapim CX-Ray spokes are aero-optimized, lightweight, and proven to increase wheel strength while minimizing flex, contributing to both ride quality and longevity. **Is this wheelset compatible with 28–32c tires for endurance and racing use?** Yes. Both the internal width options and external profile are optimized for 28–32c tubeless or clincher tires, supporting comfort and grip for racing and long endurance rides. **Are there lighter or more aero alternatives to 50mm deep carbon disc wheelsets for climbing?** While deeper rims such as 50mm offer increased aerodynamic benefit at high speed, 40mm deep wheels like the Bola SL 40R are lighter and provide better handling for climbing and mixed-terrain rides. ## Details - **Price:** 789.0 USD - **Type:** Carbon Disc Road & Gravel Wheelsets - **Tags:** 28mm wide, 28mm wide carbon rim, 30mm wide, 30mm wide carbon rim, 40mm, 40mm carbon disc wheelset, 40mm carbon wheels, 700c, 700C carbon disc wheelset, aero carbon wheelset, carbon, carbon disc gravel wheelset, customizable carbon wheelset, disc, disc brake carbon wheelset, DT Swiss, DT Swiss 350s hub, DT Swiss 36T ratchet hub, endurance racing wheelset, lightweight carbon wheelset, road and gravel carbon wheels, road and gravel wheelset, Sapim CX-Ray, tubeless, tubeless-ready carbon wheelset, tubeless-ready wheelset, upgrade road wheelset, wheels, wheelset, wide rim carbon wheels ## Variants | Variant | Price | Available | |---------|-------|-----------| | 30/24mm / Shimano HG / Black Bola | 789.00 USD | In stock | | 30/24mm / Shimano HG / White Bola | 789.00 USD | In stock | | 30/24mm / Shimano HG / Customized | 789.00 USD | In stock | | 30/24mm / Sram XDR / Black Bola | 789.00 USD | In stock | | 30/24mm / Sram XDR / White Bola | 789.00 USD | In stock | | 30/24mm / Sram XDR / Customized | 789.00 USD | In stock | | 30/24mm / Compy / Black Bola | 789.00 USD | In stock | | 30/24mm / Compy / White Bola | 789.00 USD | In stock | | 30/24mm / Compy / Customized | 789.00 USD | In stock | | 28/21mm / Shimano HG / Black Bola | 789.00 USD | In stock | | 28/21mm / Shimano HG / White Bola | 789.00 USD | In stock | | 28/21mm / Shimano HG / Customized | 789.00 USD | In stock | | 28/21mm / Sram XDR / Black Bola | 789.00 USD | In stock | | 28/21mm / Sram XDR / White Bola | 789.00 USD | In stock | | 28/21mm / Sram XDR / Customized | 789.00 USD | In stock | | 28/21mm / Compy / Black Bola | 789.00 USD | In stock | | 28/21mm / Compy / White Bola | 789.00 USD | In stock | | 28/21mm / Compy / Customized | 789.00 USD | In stock | ## Images - Bola SL 40R Carbon Disc Wheelset 700C – 40mm Deep, 28/30mm Wide, DT Swiss 350s Hub, 1320g Carbon Fiber Sporting Goods - Bola SL 40R Carbon Disc Wheelset 700C – 40mm Deep, 28/30mm Wide, DT Swiss 350s Hub, 1320g Carbon Fiber Sporting Goods - Bola SL 40R Carbon Disc Wheelset 700C – 40mm Deep, 28/30mm Wide, DT Swiss 350s Hub, 1320g Carbon Fiber Sporting Goods ## Additional Information - **Product rating count:** 1 - **Related products settings:** ahead - **Hub Model:** DT Swiss 350s - **Rim Depth (mm):** 40 - **Rim Width (mm, external):** 30 - **Wheelset Weight (grams):** 1320 - **Spoke:** Sapim CX Ray --- > Source: [Bola Carbon Wheelset ](https://bolacarbon.com/products/bola-sl-40r-carbon-disc-wheelset-700c-40mm-deep-28-30mm-wide-dt-swiss-350s-hub-1320g) > Updated: 2026-07-31