Can i change from a 70 to a 60 aspect ratio tire?

Yes, you can change from a 70 to a 60 aspect ratio tire, but it will affect your vehicle's handling, ride comfort, and speedometer accuracy. A 60 aspect ratio tire will generally have a shorter sidewall, which can improve cornering performance but may result in a harsher ride. Be sure to check that the new tire size is compatible with your vehicle's wheel wells and that it maintains a safe overall diameter. It's advisable to consult a tire professional for guidance specific to your vehicle.