[Slipangle]

Okay, I've kind of been away from the hobby so I know you aren't supposed to mix bias ply and radial tires, but I don't know if I ever knew this one:

Suppose I have 2 tires of the bias-ply type on the rear of my car, 760-15's, and on the front I have H78-15's. I don't honestly remember if the H78's count as bias-ply or radial or something in between, let alone if they are incompatible with bias-ply tires the way radials are.

So, would this configuration be a problem?

[matt167]

H-78 15's are a bias ply tires, so you have all bias ply tires. just they use diffrent sizing methods, 1 is the old way of sizing which is the 760's and the H78 is the newer way of sizing them, that started in the 60's I think. much like 70 and 75 series radials. as for why not to mix match radials and bias, is bias on the front radial on rear will cause understeer, bias on back and radial on rear will cause oversteer.

[rj57]

And don't run two different size tires on the back of a rear wheel drive car.

They say it will burn the rear end up.

[jimfulco]

Originally Posted by rj57

And don't run two different size tires on the back of a rear wheel drive car.

They say it will burn the rear end up.

It's especially hard on a limited-slip.