Excess OS20 Tube — Presta Valve 40mm

Overview

The Excess OS20 is a standard-weight inner tube designed for oversize 20" (OS20) BMX wheels. The 40mm Presta valve suits modern BMX racing setups with Presta-compatible rim valve holes. The tube accommodates tire widths from 1.50" to 1.75", covering most OS20 tire options.

Key Features

• Presta valve (small valve) — Thinner valve design requires Presta-compatible rim valve holes; standard on modern BMX racing rims
• 40mm valve length — Standard length suitable for most BMX rim thicknesses
• OS20-specific sizing — Engineered for oversize 20" wheels; OS20 has slightly larger diameter than standard 20"
• Wide tire width range — Accommodates 1.50" to 1.75" tire widths, covering most OS20 tire options
• Standard rubber construction — Durable compound balances weight and puncture resistance for racing and training

Technical Specifications

• Valve type: Presta
• Valve length: 40mm
• Material: Rubber
• Size: OS20 x 1.50"-1.75"
• Weight: 143g (5.05oz)

Compatibility & Ideal Use Cases

• Wheel size: OS20 (oversize 20") BMX wheels
• Valve compatibility: Presta valve rims (requires Presta-specific rim valve holes)
• Tire width range: 1.50"-1.75"
• Best for: Riders using OS20 wheels; BMX racers with oversize 20" setups
• Ideal use: BMX racing, training, and practice
• Application: Single replacement tube or spare for OS20 wheel