Is it Ok to Have a Different Tire Tread Pattern for the Front and Back Wheels?
The tire tread pattern of your car’s tires is the design the manufacturer came up with. Hopefully, it enhances the tire’s ability to channel mud, snow and liquids away from the actual portion of the tread that contacts the driving surface, while maximizing the useful portion of the contact patch of the tire. Tire grooves or tread patterns can cause a condition known as tread steer, where the tread of the tire catches irregularities in the road surface. This isn’t a big deal when the tread on neither the front nor both rear tires is the same. Even if the front and rear tires have different tread designs. This only becomes an issue when the two tires on the same axle have different tread designs.
For more info, see How to Check Your Tire Tread