Example : LT225/70R19.5 or 19.5.
NOTE: Only applicable if you already have a tuner and are ordering a tune. The device serial number is displayed on the back of the device. If you are awaiting the arrival of your device, type 5 Star above.
Strategy Code is a 7 digit code ex. KTCR3R4 and is READ with the device via OBDii Port: some models will have Strategy and SWPN. Tunes cannot be completed until this information is provided.