Where to fit the better tyres

Where to fit the better tyres


Where do you fit the better tyres? That’s one of the most asked student’s
questions! What do you reckon? At the front or the rear axle? I’d like to demonstrate the right answer. But for this demo, I made this little car in timber. On one axle, the tyres have some rubber wheels, which simulating better tyres and on the other axle, the tyres I left them in timber simulating good tyres. In addition, one side of the car I painted black, so we can see better the car’s movement. First demo, lets place the car with the better tyres at the front on a ramp to simulate a bit momentum in one direction. Let’s see what happen. Okay, now let’s place the car with the better tyres at the back, and let’s see what happen. Alright, but we’re still not convinced! What about if we let the car to decide where it wants to have the better tyres? So, for the last demo, let’s place the car perpendicular to the ramp. Okay, I think it should be clear now
always place the better tyres on the rear axle. But, why is it so? There are three relevant factors which influence traction. Downforce – the more weight we can produce, the more traction. The size of the contact area –
the greater the contact area, the more traction. And the third factor is friction –
the better the tyre rubber or the rougher the road surface, the more traction. When we brake, the car’s weight is transferred to the front, and at the front axle, we increase downforce, contact area and friction. But actually, the question is not what happen at the front axle, the question should be, what happen at the rear axle at the same time? We decrease, downforce, contact area, and friction. To keep vehicle-control and compensate for the loss of traction, we always need to place the better tyres at the rear axle, regardless whether our car is a front, rear
or 4WD. The reason the drive has no impact when we brake, is because there is no driving force only braking force. And the greatest risk of losing vehicle control is when we brake for example during an emergency situation. So, let’s conclude and have a look at the
picture. I hope you enjoyed this tutorial and it’s
been informative. More tutorials are coming. Please leave me a thumbs-up, subscribe
and if you want, leave a comment below.

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