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    20" 1.7 to 2.2 Presta Valve Inner Tube

    € 3.00

    Designed for tyres for 20-inch children's bikes with a cross-section ranging from 1.70 to 2.20.

    More details
    SKU: S70 (176424)
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    Size Guide

    Available online

    Delivery in 7 to 8 days

    Our e-commerce is suspended for a transition period. We expect to be back soon!
    Product benefits
    1. Compatibility
      Compatibility
      20-inch tyres and wheels, with a cross-section ranging from 1.7 to 2.2.
    2. Waterproof
      High quality valve that retains pressure.
    Details
    Product feature
    1. How to choose an inner tube
      Check the information indicated on the sidewall of the tyre (diameter and width). For example, 26 x 2.20 means a tyre with a 26-inch diameter and 2.2 inches wide. On the tyre sidewall you will also find the dimensions in mm in ETRTO international units. For example, 50-559 means a tyre that is 50mm wide and has an inner diameter of 559mm (approx. 26 x 2.00).
    2. Removing an inner tube
      Remove the used inner tube using B'Twin tyre levers (item code 8047839).
    3. Checks to carry out before installing an inner tube
      Check the condition of your tyre and replace it if necessary. Make sure no objects are lodged in the tyre. Check the condition of your tyre rim strip. A rim strip that is even slightly bent can cause punctures. Check that your rim does not have any other issues that could damage your inner tube.
    4. Installing the inner tube
      Pre-inflate the inner tube slightly to avoid pinching. Insert the valve, making sure you are using the correct valve for your rims. Put the inner tube entirely inside the tyre so that it fits inside the rim. Take care not to pinch the inner tube when fitting.
    5. Mounting the tyre
      Start by mounting the tyre onto the wheel on the opposite side to the valve. Finish mounting the tyre at the valve to avoid pinching the inner tube. Never mount your tyre using a screwdriver or a tyre lever as you risk pinching and puncturing the inner tube.
    6. Tip from the pros
      To avoid punctures from pinching and for best tyre performance, we recommend that you check your tyres and inflate them to the suggested pressure before every ride.
    7. Inflating the tyre
      Inflate your tyre carefully to the pressure recommended by the manufacturer (visible on the sidewall of the tyre in PSI or bars; 1 bars = 14.51 PSI). Regularly check that your tyre is in the correct position as you inflate it.
    8. Weight:
      158 g
    Product testing
    1. Composition
      Material: isobutylene. Weight: 155 g.
    2. Storage advice
      Carry your inner tubes in a container that protects them from perforations (B'TWIN carry case, original packaging, etc.).
    3. Cleaning advice
      To find out the size of your wheels, check the information printed on the tyre wall. Always carry a spare inner tube and a pump.
    4. Product restrictions
      Take care not to pinch the inner tube when mounting it on.
    5. Product catchline
      20" presta inner tube (small valve) for junior bikes.
    6. Lab tested
      To guarantee optimal quality, 100% of our inner tubes are inflated for a period of 8 hours.
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