By rebuilding the tire, the Raptor R6 (Tarmac / Gravel) and similar tread patterns will be able to take part in Open and Sport classes!
By rebuilding tires and similar tires, other tire manufacturers will be able to participate in Sport Classes!
Prohibition to participate in such tire and similar tire treads.
Results - "Winter Autosprint Smiltene 2018" for all phases and Total Rankings in one place: http://www.teperis.lv/en/page/163-quot-winter-autosprint-smiltene-2018-quot-results