Sold in pairs to be used setup to use on my street wheels. These are directional tires and each pair comes in a left and a right. Sized for a slight friction fit made of soft rubber resin. OD of 22" tires is 31.3mm, 20" tires is 28.5mm, and 18" is 25.7mm. Base file was by Dirty Customs modified by me to my design specifications.