While both tires will still contiue to perform at some level, the tires are matched front to rear by design. The shape , sidewall strength, contact patch and water evacuation design of the treads do work in harmony as a set.
With that being said you have two choices. Match the set for optimum performance in turning, braking and overall feel (Best choice if you like to ride on the edge of the machines capabilities)
Just run what you got - they are black and round and hold air and will do ok together just not the absolute optimal mix.
You could use the money you save for charity or Stippers and Beer - Your call
Last edited by JDGT; Dec 16th, 2005 at 9:30 pm.