The tread pattern changed slightly The previously used Kevlar protection is replaced with GreenGuard - a highly elastic 3mm thick layer of india rubber, designed to increase puncture protection. A new sidewall construction was improved to delay the onset of cracking if the tyre is used while under inflated.  Schwalbe Marathon 16x1.35 Tyre Features Schwalbe Marathon 16 x 1.35 inch features / details: ETRO size: 35-349 Inner tube: AV4 (Car type / Schraeder valve) Inner tube: SV4 (Presta / racing type valve) Tyre pressure: 65 psi (min) to 110 psi (max) or 4.5 bar (min) to 7.5 bar (max) Weight: 420g