12 1/2" x 2 1/4" (Schrader-33mm)

Chao Yang Tube (Schrader Valve – 33mm)

Straightforward and dependable. This Chao Yang tube with a 33mm Schrader valve is built for everyday use, using the same valve style as a car tire for quick and easy inflation anywhere.

The 33mm valve length is ideal for standard rims, giving you just the right amount of reach without excess. Made from durable butyl rubber, it holds air consistently and stands up to regular riding without constant top-ups.

Simple, reliable, and ready when you need it.

Key Features:

• Schrader valve (standard car-style)

• 33mm valve length for standard rims

• Durable butyl rubber construction

• Reliable air retention

• Easy installation and everyday performance

• Suitable for a wide range of bicycle tube sizes

The 33mm refers to the valve length, which works perfectly for most standard rims that don’t need extra reach. Built from durable butyl rubber, these tubes hold air well and handle daily riding without constant pressure loss or hassle.

Simple swap. Pump it up. Ride.

Key Features:

• Schrader valve (car-style, easy to inflate anywhere)

• 33mm valve length for standard rims

• Durable butyl rubber construction

• Consistent air retention

• Easy install and dependable performance

• Fits a wide range of tire sizes depending on tube spec (e.g. 20", 24", 26", 700c variants)**