Inner tube TECNIUM 2.25/2.50-21 valve TR4 standard thickness

TECNIUM offers this inner tube. On most off-road bikes, the tyre and rim are not airtight on their own: it is the inner tube, with its valve, that keeps the air in.

Why replace the inner tube?

The benefits:

• A new tube holds its pressure, unlike a porous or patched one.
• Reinforced, thicker versions resist pinching and punctures better.
• An inexpensive part to keep in reserve for a quick repair at the track.

Why choose TECNIUM?

TECNIUM is the replacement parts range distributed by Bihr: OE-fit parts at a carefully judged price.

When should you replace the inner tube?

A tube that goes down on its own, has been patched several times, or has a damaged valve or cracked rubber: replace it, ideally at every tyre change.

Specifications and fitting tips

• Valve type: TR4
• Rim diameter: 21
• Tire width: 2.50
• Inner tube type: Standard
• Rim diameter 21"
• JS87C valve standard
• Manufacturer part number: 04-0874

Cross-Mania tip: Dust the tube with talc, inflate it slightly before refitting the tyre and do not pinch it with the tyre levers.

Also needed with this part

• Tyre fitting and repair : KITE 20.762.0.BL · KITE 20.761.0.BL

Compatibility

Choose the same size as the original tyre: it is moulded on the sidewall of your current tyre and given in the bike's manual.