Schwalbe big ben mtb tyre raceguardthe comfort is the same but the profile and the optics are clearly focused the design was so good that we have also made it in a normal tire size because a 40mm tire width is not so big it is called little big ben with ecer75 certification for fast e bikes raceguardpuncture protection level 4 a double layer of nylon fabric good protection for light and sporty tires e bike ready 50in standard pedelecs that have motor assist up to 25kmh there is no