1pack - 4pack Schwalbe SV6A Presta Tube - 20" Tyres - 23-406 to 40-406 Bike Tube 1pack - 4pack Schwalbe SV6A Presta Tube - 20" Tyres - 23-406 to 40-406 Bike Tube

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....

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....