This tire is an 10" replacement tire for all Currie 400 series scooters. This tire is a perfect and OEM matching tire for the Schwinn s400, Izip i400, Ezip e400, and all other scooters which have a wide 10" tire. This 10" black street tire is OEM and direct from Currie Tech. This is the tire you want! Please note some scooter models are named similarly to the 400 series scooters. Please make sure you need an 10" tire before ordering.