Escalator - 16"/20"×2.125"Anti skid & wide tires for children, youth bikes, and BMX bicycles. Currently sold by a set. Escalator features a central continuous rib pattern running along the tread center, flanked by staggered, blocky lugs on both sides. The blocks are arranged in a tight, interlocking herringbone style layout, with siping on the block surfaces to boost grip. The overall design balances a smooth center line and aggressive, multi directional outer blocks. Tread