I'm plaaning a "loop" of Australia in an Audi A3 quattro, which I estimate at about 15,000 kilometers total. The majority will be on sealed roads but I expect the more interesting aspects of the drive to be on unsealed roads, likely 100-200km off the sealed highway. I appreciate a 4WD is probably the 'ideal' vehicle but I'm not interested in buying one specifically for this trip.
In the past, I've done long multi-thousand km trips and thought that I just needed road tyres. However a couple of times I've nearly been stuck just travelling a small distance offroad. If there has been heavy rainfall (common in Northern Australia), a soil with a lot of clay looks like regular dirt but gets very slippery & muddy. I figure an off-road tyre may offer better puncture resistance as well.
So I'm seeking an off-road tyre for a 2011 A3 quattro. The current rim is a 17 inch. I figure I will need to drop to a 16-inch rim to find a more off-road tyre i.e. a tyre profile like 215/65R16.
So (I believe) my questions are essentially:
- What 16-inch rim will replace the Audi 17-inch and keep the same offset?
- What off-road tyre sizes will generally fit the above rim? I imagine that manufacturers aim for specific sizes for offroad tyres (happy to have specific tyres nominated)
Trying to answer my question by working backwards, a Michelin LTX Force can be had at 215/65R16. A 215 tyre width would dictate a rim width of either 7 or 7.5 inches according to https://www.tyresizecalculator.com/charts/tire-width-for-a-wheel-rim-size-chart. So for that tyre, a 16inch rim of 7/7.5 inch width with the same offset and pattern would fit.