Front Wheel Assembly with Red Rim for the Jetson® Bolt Electric Bike SunL SL50QT 7 Utilizing the time tested tread Size:15"W x 18"D Utilizing the time tested tread design our engineers have added a Dual Compound to the knobs that help the tire dig in and grip even better than before while improving durability The Defender Chain with Integrated Lock is a great accessory for your bike or scooter The 12 1 2"x2 1 4" tire is made by Wanda and it uses a pebble grain shallow siped street tread This helps to provide the bike with a better top speed and more nimble maneuverability than that which a true knobby tread tire would offer