I previously upsized my tyres which are now wider since I wanted it to be more stable on the road without performing major modifications, but that decreased the diameter by 0.4%.
I thought that wouldn't make any difference but now the car body can easily touch the ground which can cause damage (I am afraid it would cause damage to the gearbox.
The other problem is that roads here are rough, they are not helping with that so I am thinking about changing the tyres along with the rims which have scratches.
Original size: 175/70R14
Current size: 185/65R14
Should I increase the rims to 15 with a slight increase of diameter by 0.4% (185/60R15) or buy new same size rims with some increase in the diameter by 2.5% (185/75R14) in order to avoid rough roads?
What is the optimum recommendation for stability and rough roads?