The rule changes for the UMP Late Models for 2017 are cars must weigh a minimum of 2350 lbs with the driver in the car. Tire rule for 2017. Effective July 1 all LM 20’s on all 4 corners with the right rear option of LM 20, 30 or 40. No groove on right rear tire after May 30 and no groove of any tire after July 30.
