i love this i got foam tires for the xxxt cr and i pm the guy them hides i guest
he did not want them to bad i all do gt2 quick change too. these will work on a t4
i have been doing custom mounting tires for 7 year
a full set 4 $40 plus shipping 4.50
if you do not like them send back after one weekend of running let see a hobby store do that.