Quick Summary
These are Continental mountain bike inner tubes for 27.5″ (650B) wheels, sold as a pair. The tubes are stated to fit tyre widths from 1.75″ to 2.5″, and they use a 42 mm Presta valve. That makes the main buying checks the wheel size, tyre width and valve type.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | Continental, so the product is part of the Continental range. |
| Product type | Mountain bike inner tubes for 27.5″ (650B) wheels. |
| Tyre width range | 1.75″ to 2.5″, so the tyre size needs to fall within that range. |
| Valve type | 42 mm Presta valve, so the rim needs to suit a Presta valve. |
| Quantity | Set of 2 tubes, which matters if you need a matched pair. |
| Tube material | Butyl tubes. |
What to Compare Before Buying
- Wheel size: This pair is for 27.5″ (650B) wheels, so check that your wheel matches.
- Tyre width: The stated fit range is 1.75″ to 2.5″. Compare that with the size printed on your tyre.
- Valve type: These use a 42 mm Presta valve, so confirm that your rim and pump setup suit Presta.
- Quantity: The pack contains 2 tubes, which is useful if you want a spare or are replacing both at once.
Before You Decide
Confirm the 27.5″ wheel size, the 1.75″ to 2.5″ tyre width range and the 42 mm Presta valve before choosing an offer. The pair quantity also matters if you only need a single tube.
Check the Valve Stem Reach
Check that the 42 mm valve will extend far enough beyond your rim for your pump head to attach.
