The Bridgestone Turanza 6 and Hankook Ventus Prime4 Ford Streetka tyre options at Tyres.co.uk are 195/45 R16 84V XL. They match or exceed the initial load and speed requirements of 80V. Check tyre specs on the vehicle placard and do the registration search before ordering.
On the driver's side B-pillar, behind the driver's door, there is a placard detailing the tyre sizes and pressure specifications for the Ford Streetka. It contains the original tyre specifications and the recommended cold pressure for each tyre. If the wheels have been altered, double check the tyre sidewall and owner's handbook for discrepancies.
Because all drivetrain versions are front-wheel drive only, no Streetka requires matching tyres on all four wheels. Only replace all four if their wear, age or damage warrants it; otherwise, replace tyres in pairs per axle with matching specs. If two new tyres are fitted, in accordance with UK tyre-safety guidance, place them on the rear axle.