CST C3E25 Wheelchair Tube - 24 x 1 / 25-540 | Schrader Valve

Specifications

• Labeled Size: 24 x 1
• ISO Size: 25-540
• ISO Diameter: 540, the wheelchair and mobility 24 inch standard
• ISO Width: 25 mm
• Valve: Standard Schrader
• Valve Shaft: Smooth
• Wall Thickness: 0.97 mm
• Tube Compound: Butyl
• Application: Wheelchairs, mobility scooters, and any 24 inch rim built to 540 mm
• MPN: Z240256

FAQ

Will the CST C3E25 fit a 24 inch bike wheel?

The CST C3E25 fits 24 inch rims built to a 540 mm ISO diameter, which is the wheelchair and mobility standard. Many 24 inch bicycle wheels, including BMX and kids bikes, use a 507 mm rim instead, and this is the wrong tube for those. Read the ISO number printed on your tire sidewall, which shows as width then diameter, for example 25-540.

What tire size does the CST C3E25 tube fit?

The CST C3E25 is labeled 24 x 1 and built for a 25 mm ISO width on a 540 mm rim. It suits the narrow 24 inch tires used on manual wheelchairs and mobility scooters in that range.

What kind of pump does the CST C3E25 need?

The CST C3E25 uses a standard Schrader valve, the same type found on car tires. Any floor pump, hand pump, or gas station air hose with a Schrader head will inflate it, and no adapter is needed.

Is the CST C3E25 a bicycle tube or a wheelchair tube?

CST builds the C3E25 for wheelchair and mobility scooter wheels, and it is sold as a scooter tube. It works on any 24 inch rim built to a 540 mm ISO diameter, whatever the device happens to be.

Best For

Best for anyone keeping a wheelchair or mobility scooter rolling on 24 inch, 540 mm wheels. It is also the spare worth keeping in a drawer if you depend on that chair or scooter every day, because a flat on a mobility device is a different kind of problem than a flat on a bike. Bring the wheel by the lab if you would rather have it fitted than do it yourself.