Quick Summary
This two-pack of butyl rubber inner tubes is listed for 20-inch tyres sized 20 x 4.0/4.5. Each has a 32 mm Schrader AV32 valve. Check the tyre sidewall and valve position before fitting.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Quantity | Two inner tubes. |
| Tyre size | 20-inch tyres sized 20 x 4.0/4.5; check the marking on your tyre sidewall. |
| Valve | 32 mm Schrader AV32, described as a regular valve. Check that it suits your rim and existing setup. |
| Material | Butyl rubber. |
What to Compare Before Buying
Confirm that your tyre sidewall shows the stated 20-inch size and 4.0/4.5 width. The general road-bike and mountain-bike wording does not establish fit for other tyre sizes.
Check the valve type and length against your wheel. This listing specifies a 32 mm Schrader AV32 valve.
Setup and Correct Use
Before fitting, add a little air to give the tube some shape and help prevent it twisting or bunching. Check the valve position, then inspect that the tyre bead sits evenly against the rim on both sides.
The supplied fitting advice also suggests placing the tube in water before installation: bubbles indicate damage. Keep the tube away from sharp objects that could puncture it.
Before You Decide
Check the tyre size marking, confirm the 32 mm Schrader valve suits your wheel, and make sure a two-tube pack is the quantity you need.
