Drum in Disc ; not only 4 discs

A rear-wheel-drive race car with 50/50 front/rear weight ratio as its perfect model.

For normal car, the weight ratio is 60/40 or even closes to 70/30, then the brake ratio between the front and rear 60/40 or 70/30 to create a perfect brake balance.

Weight transfer should be added in at the time vehicle is running in a speed.

When you step a sudden brake, you will feel your body flying forward like something is pulling you that way. The weight is moving from the rear to the front due to the deceleration.

If we factor in weight transfer, our front/rear weight ratio will change how hard we brake is never the same.

We might brake lightly when we’re driving around the town, or brake hard when we’re on the track.

If our static weight ratio is 60/40, our weight ratio under heavy braking might change to 80/20, but during street driving it might only be 70/30.

It depends on how hard you drive and considers about braking power lose by the heat of a rear drum brake.

Upgrading to a more reasonable rear drum in disc brake kit is nevertheless a wisdom idea.

Drum in disc or what else ?


Polo-OE - before installing drum in disc kit.

VW Polo upgrade to UPI rear drum to disc conversion brake system







Vehicles like Volkswagen Polo, user can easily find out the nose drive phenomenon when driving in the city.

Because Polo has a good front brake, and the lag of drum brake on rear makes the braking power toward to it’s front end.

Frequent brakes in urban area actually annoy some drivers for it’s nose driving.

After changing the O.E. rear drum brake system to UPI drum in disk conversion brake kit, the balance of braking power will become so reliable and the stopping power can be easily sensed from the rear end.

It goes without saying that the drum in disc brake system is the best system of all at present.

( Nov. 6, 2015 )