The Salt Rookie Freewheel Drive is a straight replacement rear wheel designed with a flip-flop style interface for a 13t freewheel. This 18" version is comprised of the Salt Beam single wall, alloy rim laced with steel spokes to their Rookie Freewheel rear hub. The Beam rim is wider at 35mm with an alloy, looseball rear hub and 10mm CrMo axle. ###section### Product Specs WHEEL SIZE: 18" HUB: Freewheel AXLE: 10mm DRIVE SIDE: Right Side Drive RIM: Single Wall SPOKES: Straight Gauge NIPPLES: WEIGHT: TBC