Have a neighbour with an A class Mercedes-Benz with low profile tyres fitted. We all live down a 250metre limestone farm road - my family think the road condition is fine (driving a Ford Transit and C3 Citroen) - we have had no suspension repairs in 5 years. The neighbour thinks the road condition is unacceptable.

My question is - would low profile tyres have a significant impact on ride quality when driving slowly (less than 10-15mph) down a made farm road. Would you expect to have suspension problems on vehicle driven slowly on such a road (I would guess indentations around 25mm deep and 50mm maximum)