1X Accelera IOTA ST-68 265 40 R21 105Y XL NEW SUV Tyre. The Accelera IOTA ST-68 is the ultimate SUV tyre all year round. Designed to put the SPORT in SUV, this tyre provides excellent grip and sporty feel when you need without the sacrifice of a comfortable drive. Made with specialised grooves, this tyre is great in the UK’s unpredictable wet and dry conditions.