Vauxhall Insignia Sports Tourer tyre options at Tyres.co.uk include the Michelin Primacy 5 and Bridgestone Turanza 6 in 225/55 R17 for 2013 SRi and Tech Line models. Confirm the exact generation, wheel option, load index, speed rating and any XL requirement against the registration before ordering.
Details concerning the Vauxhall Insignia Sports Tourer tyre size and pressure can be found on the placard located on the front left door frame. It is visible when the door is open. In right-hand-drive vehicles in the UK, it would be located on the front passenger side door. The sidewall of the tyre also indicates the size, load index, and speed rating.
The Vauxhall Insignia Sports Tourer usually does not require all four tyres to be replaced at the same time. You should replace the tyres in pairs on the same axle. If new tyres are going on one axle, those should go on the rear axle. If you have an all-wheel-drive version, you should replace all four tyres so that the tread depth stays consistent across all tyres.