Excess XLS Alloy Rim 451×19.5mm 36h With Brake Surface

Product Overview

The Excess XLS is a lightweight double-wall rim designed for 20" BMX race wheels. Built from 6061-T6 aluminum with optimized internal geometry, this 36-hole rear rim weighs 286 grams and features an aero profile with angled spoke holes for improved wheel stiffness. Includes a machined brake track for caliper or U-brake compatibility.

Key Features

• Double-wall construction with optimized geometry – Internal rib design removes excess material while maintaining impact resistance and lateral stiffness

• Low-profile aero shape – Streamlined rim profile reduces aerodynamic drag during sprint sections and wind resistance in crosswinds

• Angled spoke holes – Nipples sit at a more direct angle to the hub flange, improving spoke tension distribution and reducing stress at the spoke bed

• Machined brake track – Precision-machined sidewalls provide consistent braking performance with caliper or U-brake systems

• Single-process anodized finish – Black anodizing applied after machining provides corrosion resistance and consistent surface finish without added weight

• Presta valve hole – Drilled for Presta valve stems, standard on race wheels for easier inflation and lower valve weight

Technical Specifications

• Rim size: 20" × 1 1/8" to 1 3/8" (451mm BSD)
• External width: 19.5 mm
• Internal width: 14.6 mm (rear spec)
• Rim height: 16 mm
• Spoke holes: 36h
• Weight: 286 g
• ERD (Effective Rim Diameter): 438 mm
• Material: 6061-T6 alloy
• Wall type: Double-wall with angled spoke holes
• Valve type: Presta
• Brake compatibility: Rear wheel with machined brake track (caliper/U-brake)
• Finish: Black anodized
• Max spoke tension: 115 kgf

Compatibility and Ideal Use Cases

Designed for rear wheels on 20" BMX race bikes using rim brakes (caliper or U-brake). The 36-hole drilling pairs with standard cassette or freewheel race hubs for strong wheel builds capable of handling gate starts and jump impacts. Best suited for competitive racing where weight savings, aerodynamics, and reliable braking are all required. 451mm BSD fits standard 20" × 1 1/8" to 1 3/8" race tires. Not recommended for disc brake setups—brake surface adds weight unnecessary for disc applications.

EXCESS XLC 451x19.5MM RIM SPECIFICATIONS
ERD: 438mm
Height: 16mm
Internal Rim Width: 14.6mm (front)
External Rim Width: 19.5mm
Spoke tension recommended <115kgf

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