Schwalbe AV4 Tube Schwalbe Tube AV4. Reliable, high quality and very air tight inner tubes from Germany's number one manufacturer. All valves are nickel plated and valve inserts are replaceable. Sized for Brompton folding bicycles. Fits ALL tires that are compatible with your Brommie. Fits Brompton wheels, 28mm-37mm tyres - Highest quality inner tube for Brompton we know of! Details Schwalbe tubes are designed & manufactured to retain air pressure considerably longer than their competitors. Not only is each individual tube inflated & inserted into a mould to ensure that there is even wall thickness & excellent air retention, they are also stored under pressure for 24hrs to test air retention. Valve length of 40mm for standard version. Weight 85g. Applicable Tyre Sizes: (37-340) 16 x 1 3/8 - 400 x 35a (28-349) 16 x 1.10" (35-349) 16 x 1.35" (37-349) 16 x 1.40" (28-355) 18 x 1.10" (35-355) 18 x 1.35" VALVE: Schrader WEIGHT: 85 grams STEM LENGTH: 40mm Please visit our website at http://www.ecomtb.com.my OR https://shopee.com.my/eco_mtb ** There is 1-3cm errors due to manual measurement. Please kindly understand. ** Actual product colour may slightly vary due to photographic lighting sources or your monitor settings. ** WE DO NOT DO COD ** ONLINE ONLY ** We support original products only. ** PRICE INDICATED IS ALREADY BEST PRICE, EXCLUDE COURIER