A new feature, implemented with patch 16.20 of Fortnite, sees players able to to install off-road tires onto vehicles. Naturally, this forms one of the Week 5 challenges you'll need to complete.
The tires you need can be found at all gas stations on the map.
Where to find off-road tires
All gas stations are likely to contain one or more pieces of off-road tire equipment.
Once in possession of your off-road tires (which will take up a slot in your inventory until use), all you have to do is approach a vehicle in working order, and throw the tire at the wheels. This is exactly the same action as when using an item, a potion, or a healing item.
Cars and trucks that have been modified this way are able to climb steep slopes and drive better on all types of terrain. However, they become less manageable!
This challenge is not difficult to achieve in itself, but rival players could throw a spanner in the works. Be mindful of this when attempting to complete the challenge!