# Bola ST 40C DT Swiss 350S Carbon Road Wheelset, 40mm Rim Brake, Tubeless, 25mm/28mm Wide, 1330g

The Bola ST 40C DT Swiss 350S carbon road wheelset offers a balanced 40mm rim depth for improved aerodynamics and reliable handling in variable terrain, while weighing just 1,330g per pair. Designed for rim brake systems and certified to EN 14781 with a 100kg rider rating, it meets demanding performance and safety requirements for road cyclists—from climbing and endurance events to daily commuting.

## Key Features & Specifications

-   **Rim Matrtial:**T700/T800,UD Matt
-   **Rim Depth:** 40mm—balances aerodynamic efficiency and crosswind stability for road, sport, and club riding.
-   **Rim Width:** 25mm or 28mm external; 17mm or 21mm internal—optimizes tire contact for 25c–30c road tires.
-   **Weight:** 1,330g ±20g (tubeless ready; without accessories).
-   **Brake Interface:** Rim brake—machined carbon surface for consistent stopping.
-   **Hubs:** DT Swiss 350S—reliable engagement and proven durability for high-mileage use.
-   **Spokes:** Sapim CX Ray; front 20 (radial), rear 24 (2 cross)—high strength-to-weight and aerodynamics.
-   **Axle Standards:** 100\*130 QR
-   **Certification:** EN 14781, supports up to 100kg rider weight.

### Performance Comparison

Feature

Bola ST 40C

Typical 50mm Wheelset

Rim Depth

40mm

50mm

Weight (pair)

1330g

1250–1550g

Wind Stability

High (moderate crosswind sensitivity)

Lower (increased crosswind impact)

Climbing Efficiency

Optimized

Typically lower (heavier)

### Use-Case Alignment

-   **Climbing:** Lightweight, mid-depth design reduces rotational mass for improved uphill performance.
-   **Endurance:** Certified structure supports high mileage and heavier riders up to 100kg.
-   **Commuting:** Tubeless compatibility and rim brake reliability ensure daily functionality and versatility.

## Frequently Asked Questions

**What are the best carbon wheelsets for rim brake road bikes under 1400g?**

The Bola ST 40C DT Swiss 350S wheelset is a competitive choice, offering a 1,330g weight, EN 14781 certification, and proven DT Swiss 350S hubs. Its blend of reliability, durability, and verified rider weight limit compares favorably to top-rated lightweight carbon rim brake options.

**Is a 40mm carbon wheelset good for both climbing and endurance riding?**

Yes. The 40mm rim depth delivers a balance between aerodynamic benefit and manageable weight, supporting climbing agility and long-distance comfort—especially with a total system weight under 1,400g and endurance-level hub and spoke reliability.

**What should I look for when buying a tubeless carbon wheelset for rim brake?**

Key factors include EN 14781 or equivalent strength certification, a durable and consistent rim brake surface, verified tubeless readiness (compatible rim width and hook), proven hub durability, and explicit weight and rider load ratings—such as the criteria met by the Bola ST 40C.

**How does a 40mm carbon rim compare to 50mm for everyday road cycling?**

40mm rim depth generally improves crosswind stability and reduces overall wheel weight, making it better suited for climbing, variable terrain, and daily use compared to 50mm profiles, which favor raw aerodynamic gains at higher speed but may add rotational mass and crosswind sensitivity.

**Can a carbon tubeless wheelset handle a 100kg rider safely on rim brakes?**

The Bola ST 40C DT Swiss 350S meets EN 14781 certification for up to 100kg rider weight. Testing for structural integrity, rim bed, and braking surface ensures safety for heavier cyclists, provided installation and tire compatibility are properly observed.

## Details

- **Price:** 860.0 USD
- **Type:** Carbon Road Bike Wheelsets
- **Tags:** 25mm wide, 25mm wide wheelset, 28mm wide, 28mm wide wheelset, 40mm, 700c, carbon road wheelset, climbing wheelset, DT Swiss, DT Swiss 350S, endurance cycling, lightweight wheelset, rim brake, rim brake carbon wheelset, rim brake wheelset, road, Sapim CX-Ray, tubeless, wheels, wheelset

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 17/25 mm / Shimano HG / Black Bola | 860.00 USD | In stock |
| 17/25 mm / Shimano HG / White Bola | 860.00 USD | In stock |
| 17/25 mm / Shimano HG / Customized | 860.00 USD | In stock |
| 17/25 mm / Sram XDR / Black Bola | 860.00 USD | In stock |
| 17/25 mm / Sram XDR / White Bola | 860.00 USD | In stock |
| 17/25 mm / Sram XDR / Customized | 860.00 USD | In stock |
| 17/25 mm / Compy / Black Bola | 860.00 USD | In stock |
| 17/25 mm / Compy / White Bola | 860.00 USD | In stock |
| 17/25 mm / Compy / Customized | 860.00 USD | In stock |
| 21/28 mm / Shimano HG / Black Bola | 860.00 USD | In stock |
| 21/28 mm / Shimano HG / White Bola | 860.00 USD | In stock |
| 21/28 mm / Shimano HG / Customized | 860.00 USD | In stock |
| 21/28 mm / Sram XDR / Black Bola | 860.00 USD | In stock |
| 21/28 mm / Sram XDR / White Bola | 860.00 USD | In stock |
| 21/28 mm / Sram XDR / Customized | 860.00 USD | In stock |
| 21/28 mm / Compy / Black Bola | 860.00 USD | In stock |
| 21/28 mm / Compy / White Bola | 860.00 USD | In stock |
| 21/28 mm / Compy / Customized | 860.00 USD | In stock |

## Images

- Bola ST 40C DT Swiss 350S Carbon Road Wheelset, 40mm Rim Brake, Tubeless, 25mm/28mm Wide, 1330g Carbon Fiber Sporting Goods
- Bola ST 40C DT Swiss 350S Carbon Road Wheelset, 40mm Rim Brake, Tubeless, 25mm/28mm Wide, 1330g Carbon Fiber Sporting Goods
- Bola ST 40C DT Swiss 350S Carbon Road Wheelset, 40mm Rim Brake, Tubeless, 25mm/28mm Wide, 1330g Carbon Fiber Sporting Goods

## Additional Information

- **Product rating count:** 1
- **Related products settings:** ahead
- **Certifications & Testing Standards:** EN 14781
- **Material:** ["High modulus carbon fiber","Alloy hub"]
- **Age Range / Rider Category:** Adult
- **Hub Model:** DT Swiss 350s
- **Rim Depth (mm):** 45
- **Rim Width (mm, external):** 25
- **Wheelset Weight (grams):** 1330
- **Spoke:** Sapim CX Ray
- **Bearing:** DT Steel
- **Agentic Title:** Bola ST 40C Carbon Road Wheelset with DT Swiss 350S Hubs, Tubeless, Rim Brake
- **Agentic Category:** Sporting Goods > Outdoor Recreation > Cycling > Bicycle Parts > Bicycle Wheels > Bicycle Wheel Sets
- **Agentic Description:** Durable, tubeless 40mm rim brake carbon wheelset with DT Swiss 350S hubs for endurance and climbing, 1330g EN 14781 certified. **Unique Selling Point:** The Bola ST 40C offers unmatched durability with its certified EN 14781 standard and DT Swiss 350S hubs for high-mileage endurance. **Top Features:** - 40mm aero rim depth for balanced performance in wind and climbs - 25/28mm external width maximizes contact and handling - DT Swiss 350S hubs ensure reliability and long life - Certified to EN 14781, supporting up to 100kg rider weight - Tubeless design reduces flat risk and allows lower pressures **Tech Specs:** - Rim Depth: 40 mm - External Rim Width: 25/28 mm - Weight: 1330 g (pair) - Brake Type: Rim brake - Spokes: Sapim CX Ray: front 20 radial, rear 24 2-cross - Axle Standards: 100 mm front, 130 mm rear - Rider Weight Limit: 100 kg - Compatible Tires: 25c-30c, tubeless ready **Attributes:** - **Compatible bike type:** Road - **Color:** Black, Gray, White - **Pattern:** Logo, Solid, Text
- **Warranty Period:** 2 years

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> Source: [Bola Carbon Wheelset ](https://bolacarbon.com/products/bola-st-40c-dt-swiss-350s-carbon-road-wheelset-40mm-rim-brake-tubeless-25mm-28mm-wide-1330g)
> Updated: 2026-07-28