Not sure since no Panteras were imported with 10" Campis in back. This was a Euro-only option, possibly for Gr-3 club-racers.Stock on '71-74 Panteras were 185-70x 15 on 7" fronts & 205 or 215-70 x 15 on 8" rears. 295-50x 15s were popular on 10" Campis at one time, but are no longer available except in burger-stand speed ratings.