Tyres.co.uk has Goodyear EfficientGrip 2 SUV and Michelin Primacy 4 in the size 235/60 R18 103V and they are 18-inch factory tyre fitments. Check the door placard specs for your registration, as some versions of the Toyota bZ4X have 20-inch wheels.
To find the tyre size for the Toyota bZ4X, locate the centre of the driver's side door pillar. The information placard for tyres is located there and can be seen when the door is open. The information placard will have the tyre size, as well as additional information regarding load index, speed rating, and cold inflation pressures. It is essential to cross check this before placing an order.
As long as other tyres meet Toyota's matching criteria for make, model, tread design, and wear, the Toyota bZ4X will not need all four tyres replaced. All-wheel-drive Toyota bZ4X variants must have all four tyres closely matched. It is the safety recommendation of the UK to place the two new tyres on the rear axle if only two new tyres are purchased.