More wheels is also good on low traction surfaces, or to reduce ground pressure. An extra axel can also reduce the chance of beaching on rough terrain.
Big trucks also want more surface area against the road on their tires, both to reduce wear per tire and to get more traction, which is why some have extra wheels
More wheels is also good on low traction surfaces, or to reduce ground pressure. An extra axel can also reduce the chance of beaching on rough terrain.
Big trucks also want more surface area against the road on their tires, both to reduce wear per tire and to get more traction, which is why some have extra wheels