Hi, recommended tyre size from Mazda are front 195/70R15 and rear 215/65R15 giving rolling circumferences of 654mm & 660.5mm if you increase diameters then over time this cause automatic transmission wind up issues (assuming yours is auto)
Exact Tyres ‘Goodyear cargo vector’ which I found only brand to do both sizes can be sourced from tyreleader.co.uk and alloys of the correct 15” diameter from pneus-online.
Low profile tyres do not give comfortable ride in a bongo as the unladen weight is 2280kg and more if converted!
Let me know if you need more details of alloys as you’ll also need to get new wheel studs to fit these alloys. I can post a photo of them on my bongo if needed.
Regards Kev
