40x30mm Carbon Road Rims for Road Bike

40x30mm Carbon Road Rims for Road Bike

Key Features of Carbon Rim Road Bike 700c

The rims are engineered with an advanced carbon layup that improves impact resistance and shape retention. This helps avoid common issues such as rim cracks during high mileage use, ensuring fewer warranty claims and stronger trust in your brand. The 30mm internal width matches the current trend of 25–32mm road tires. It allows better grip, lower rolling resistance, and tubeless compatibility. For B2B buyers, this means one carbon rim design covers a wide range of customer preferences. With a 40mm depth, the carbon fiber rims achieve a middle ground between aero performance and climbing agility. This reduces the need for shops to carry multiple wheelset depths, helping you meet varied customer demands with one model. The carbon fiber bike rims use a refined carbon layup that resists impact and maintains shape under heavy use. This directly addresses the issue of cracks or deformation that often occur with lower-quality options in the market.

Specifications of 40x30mm Carbon Road Bike Rims

Why Choose Carbon Road Rims 40x30mm

Selecting the right rim depth and width can be challenging, especially when you need a product that appeals to a wide range of riders. The 40x30mm carbon road rims are designed to strike that balance.

All-Round Performance
At 40mm, the rim profile gives riders noticeable aerodynamic benefits on flat roads, while still being light enough for climbing. This versatility means your customers don’t need separate wheelsets for different terrains, reducing costs and simplifying choices.
Modern Tire Compatibility
The 30mm width supports 25–32mm road tires, which are now the preferred sizes for most road cyclists. This feature ensures better grip, improved comfort, and full tubeless compatibility. For you, it means one product can serve multiple customer needs.
Reliable Quality for B2B Buyers
Using a reinforced carbon layup, the rims maintain strength and durability even under demanding use. This helps reduce the risk of cracks or warranty claims, giving your business greater confidence in long-term performance.

40x30mm Carbon Fiber Road Rim Brake & Tubeless Ready

Optimized for Rim Brakes
Not every rider has switched to disc brakes, and many still prefer the simplicity of rim brake road bikes. These rims are built with a reinforced braking surface that delivers consistent stopping power and heat resistance. This feature ensures safe performance even during long descents.
Tubeless Ready for Versatility
The 30mm internal width is fully compatible with tubeless tire systems. Tubeless setups allow riders to run lower pressures, improving comfort and reducing the chance of flats. For shops, this flexibility means fewer returns and higher customer satisfaction.
A Single Rim for Different Needs
By combining rim brake compatibility with tubeless-ready construction, the 40x30mm carbon road rims reduce the need for multiple product lines. This makes inventory management easier while giving your customers a reliable, future-proof solution.

OEM & Custom Options for Carbon Fiber Road Bike Rims

For bike brands and distributors, the ability to customize products is just as important as performance. The carbon fiber road bike rims in 40x30mm size are available with OEM and custom options that help you meet your market’s specific needs.
Branding and Graphics
You can add your own logo, decals, or design elements to the rims. This allows you to maintain a consistent brand identity and create a product line that stands out in your local market.

Technical Configurations
Beyond looks, technical details can also be tailored. Options include:

• Different spoke hole counts to fit various hub choices.
• Tubeless or clincher-specific builds.
• Custom layup adjustments for weight or stiffness preferences.

Packaging and Order Flexibility
OEM services extend to packaging design, making it easier for you to deliver a complete product experience. Minimum order quantities are structured to support both established brands and growing shops.

Global Shipping & Lead Time
Fast and Reliable Shipping
When you order Top-Fire 700c carbon road rims, you can rely on fast global shipping. Whether you run a bike shop or manage OEM orders, we make sure your carbon fiber road bike rims arrive on time and in perfect condition.
Production Lead Time
For standard 40mm carbon road rims, the typical lead time is clear and predictable. You can plan your inventory or OEM production knowing exactly when the rims will be ready. Custom or bulk orders may take slightly longer, but we keep you updated every step of the way.
Flexible International Delivery
No matter where you are, Top-Fire supports shipping to most countries. We work with trusted carriers to deliver your carbon road rims safely and efficiently. You can track your order from our warehouse to your door.
Clear Communication for B2B Orders
We understand that timing is crucial for bike shops and OEM clients. You will always know your order status. Our team is available to answer questions about shipping, customs, or lead times.

Why Choose Top-Fire Carbon Fiber Rims for Road Bike?

Performance Testing of Carbon Rims Road

Rim UCI Impact Test
This test simulates the impact a rim may face during extreme riding conditions. With the rim set up without spokes, a vertical free-fall impact is applied directly to the spoke hole area, in accordance with UCI standards.
Result: The rim withstood the repeated impacts without cracks or structural damage, fully meeting UCI certification requirements.

Rim Positive Rigidity Test
Rigidity testing evaluates how the rim responds when subjected to vertical loads. In this test, the rim was mounted on a machine and subjected to increasing loads of 10 kg, 20 kg, and 30 kg. The corresponding deformation was measured at each stage, and the stiffness values were calculated.
Result: The rim achieved an average rigidity of 197.3 N/mm. The rim maintained stable stiffness across different loads, ensuring excellent responsiveness and stability for high-performance riding.
Walking Fatigue Test
The walking fatigue test simulates long-term riding conditions to evaluate rim durability under repeated impact. In this test, the rim was run at a constant speed of 40 km/h while the tire struck obstacles measuring 10 mm in height and 50 mm in width. The setup included a load of 64 kg, a swing angle of 5°, and tire pressure at 90% of the maximum rating. Over the course of the test, the rim experienced approximately 900,000 continuous impacts.
Result: After 12 hours and 58 minutes of testing, covering a distance of 535 km, the rim showed no abnormalities in its structure, tire mounting area, or outer circle. These results confirm the rim’s outstanding fatigue resistance and reliability for long-term cycling performance.
Rim Spoke Tension Test
Spoke tension testing ensures the rim can handle high spoke pulling forces during wheel assembly and real riding conditions. The rim was tested at multiple spoke tension levels up to 500–600 kgf.
Result: The rim withstood high spoke tension without abnormalities, proving its reliability in heavy-load and competitive environments.

The Production Process of Carbon Rims in TOP-FIRE

TOP-FIRE represents the latest technological advances in carbon-fiber bicycle rim performance products. Engineered from the trail up to be lighter, stronger, faster, and more aerodynamic.The production processes are as follows:
Preform fit->Preform into the mold->Thermoforming->cooling->Mould to take product->Pull air bag->Secondary heating->Sandblasting->Hole processing->Polish

• Preform fit: Paste the shape of the product according to the structural design drawing, not more paste, less paste.
• Preform into the Mold: When entering the mold, the preformed product should be straightened out to avoid yarn clamping.
• Thermoforming: 155±5℃/1 hour.
• Cooling: After cooling, the mold surface temperature is 90℃↓.
• Mould to Take Product: The product must not be bruised.
• Pull airbag: The airbag needs to be removed and cleaned.
• Secondary Heating: The product is heated twice to eliminate internal stress and improve the reaction rate. 150±5℃/2.5 hours.
• Sandblasting: The product is sandblasted and coarsened.
• Hole Processing: Choose the correct program for hole processing according to customer needs.
• Polish: Add primer to the surface of the product and make the surface of the product smooth.

Our Factory

TOP-FIRE In Exhibition