I bet it's on here somewhere, so apologies if it is.

Just trying to remember the correct factory Rally 2/4 tyre size.

Pretty sure it is 175/50/15 75H? And the alloys are a oddball 6J rather than the more common 6.5J for a 15"?

Mine had Bridestone tyres fitted when it was new, they were great.
When the fronts were worn i swapped the rears onto the front, and bought a pair of 195/45/15's to fit onto the rear, but they fouled on the suspension arm, so I then had to use the 195/45's on the front (although a 3mm spacer shin on the rear would have done the job i guess)