EXCESS XLS CARBON RIM 451X21MM 28H WITH BRAKE SURFACE

Product Overview

The EXCESS XLS Carbon is a 20" carbon fiber rim designed for mini BMX and cruiser bikes using rim brakes. Constructed from 3K carbon weave with a brake track surface and angled spoke holes, this rim accommodates 20x1-1/8" or 20x1-3/8" tires on the 451mm bead diameter standard. The carbon construction delivers high strength and stiffness at reduced weight compared to aluminum, optimized for mini/cruiser applications.

Key Features

• 3K carbon fiber weave – Carbon construction provides high stiffness-to-weight ratio and vibration damping characteristics compared to aluminum
• Brake track surface – Designated braking surface compatible with caliper, U-brake, or V-brake systems (verify carbon-specific brake pad compatibility)
• Angled nipple holes – Spoke holes drilled at an angle for more direct spoke alignment, improving spoke tension consistency and wheel stiffness
• Low-profile aero design – 23.3mm rim height balances aerodynamics with structural strength for mini/cruiser use
• Tubeless-ready bead lock system – Internal bead lock profile allows tubeless tire setup when used with tubeless valve, rim tape, and sealant (sold separately)
• 28-hole configuration – Lighter spoke count reduces overall wheel weight while maintaining adequate strength for mini/cruiser riders
• High-gloss finish – Clear coating protects carbon weave and provides visual depth

Technical Specifications

• Rim size: 20" (451mm bead diameter)
• Rim width (external): 22mm
• Rim width (internal): 16mm
• Rim height: 23.3mm
• ERD (Effective Rim Diameter): 423.4mm
• Material: 3K carbon fiber weave
• Spoke hole count: 28 holes
• Spoke hole type: Angled nipple holes
• Valve type: Presta
• Finish: High-gloss clear coat
• Weight: 289g
• Recommended maximum spoke tension: <115 KGF
• Brake compatibility: V-brake, U-brake, caliper brake (brake track surface—requires carbon-specific brake pads)
• Tubeless compatible: Yes, with bead lock system (requires tubeless valve, rim tape, and sealant)

Compatibility and Ideal Use Cases

This rim is designed for 20" mini BMX and cruiser frames using rim brakes—most commonly as a rear wheel with V-brakes, though it also works with U-brakes or caliper brakes. The 451mm bead diameter is the standard for mini/cruiser bikes, not the 406mm used on traditional BMX bikes—verify your frame and tire compatibility before ordering. The 28-hole drilling works with 28-spoke hubs in various lacing patterns. Note the 423.4mm ERD requires proper spoke length calculation—verify spoke length before ordering or building.

Best suited for mini BMX and cruiser riders who use rim brakes and want the performance benefits of carbon fiber construction—reduced rotational weight, increased stiffness, and improved responsiveness. Critical: Carbon rims with brake tracks require carbon-specific brake pads—standard rubber pads designed for aluminum will overheat the carbon and can cause catastrophic rim failure. Verify brake pad compatibility before use. The 22mm external width and 16mm internal width are optimized for the 1-1/8" to 1-3/8" tires typical of mini and cruiser bikes. The tubeless-ready design benefits riders looking to further reduce weight and gain puncture protection. Ideal for riders within typical mini bike weight limits who ride park, street, or cruising and prioritize performance. Carbon rims require careful handling during installation and maintenance—overtightening spokes or using incorrect brake pads can damage the rim. Not recommended for disc brake or brakeless setups—choose a brakeless surface version for those applications.

EXCESS XLS 451x21MM RIM SPECIFICATIONS
ERD: 20": 423.4mm
Height: 23.3mm
Internal Rim Width: 16mm
External Rim Width: 22mm
Spoke tension recommended <115KGF

Tubeless Ready System - Our rims feature a Bead Lock System, needed for the rim to be Tubeless Ready. With the installation of additional items needed you can get the rim ready for tubeless set up, along with the usage of a tubeless specific tire. With a tubeless set up, you can lighten up your wheels, saveing rotational weight, as well as have a sealant inside your tubeless ready tire to help automatically repair small punctures.
Additional items needed to convert to a Tubeless system include Special Valve, Sealant Rim Tape, and Liquid sealer.

V-Braking Compatible - Designed to be used as a rear rim when using a V-brake.