I have had a lot of calls this week on the tire rules at Spoon for 2017 so here they are:
UMP Modifieds Only approved tire will be the M-30S, A-40S, M-60 and H-40. The M-60 and H-40 may be used as a RR tire option.... NO GROOVING Allowed on any tire. No Siping or Grooving M-30S Siping permitted on M-60 when used on RR. The A-40S and H-40 will NO longer be made after March 1st, 2017. Siping is permitted on the A-40S and H-40 until out of circulation during 2017.
E-Mods May use A-40S, A-40, H-40, M-30S. NO Grooving Allowed on any tire NO Grooving or Siping Allowed on M-30S M-60 may be used in future but not allowed at this time.
UMP Pro L/M M40 tire ONLY After May 30th NO Grooving or Siping Allowed on Rear tires. In 2018 there will be No Grooving or Siping of any tire.
UMP Super L/M Tire rules will be the same as Fairbury unless stated otherwise.
Spoon 6-Shooters May use USED A-40, A-40S or H-40 tires. NO new race tires allowed