What size are the tires? June 20, 2019 16:38 Updated Follow We have increased the tire width for extra cushion and a more pleasurable ride. The new tire size is 27.5'x2.20'. Related articles How wide are the handlebars? What size and weight of rider can this bike support? What size tires are on the Aveny? Can I add lights? Can I add fenders? Comments 0 comments Please sign in to leave a comment.