Your kids will hang with the big dogs on this legit XC tire for kids. The new Kids XR1 has the identical tread of our notorious X1 racing tire, perfect for multi-purpose riding on trails or pavement. And the durable compound may still be in great shape when they outgrow the bike. Available in 20? and 24?. Comp level offers upgraded 60 tpi casing for more supple trail feel.