Ditchfinders 

Vehicle tires of such unpredictable tendencies or dangerously low ability, they shouldn't be used for more than mundane commuting and sometimes not even that. Budget tires from new or little-known manufacturers that receive universally bad reviews are often called this in Great Britain and Australia, yet the term can be used to describe any tire that due to behavior, design, or condition (i.e., bald), are likely to cause a compromise, if not a total loss of control with relatively little provocation.

"Few things would say idiot, much less poseur quite like putting ditchfinders on your sports car."

Ditchfinders by FXnerd November 4, 2012