I have a set of Vittoria Rubino Pro with graphene that were almost impossible to mount. I destroyed 3 steel core tire levers and put some scratches on the rims in the process. I actually gave up on the second install and dismounted the first one that I had done. I sure did not want to be on the road with a flat tire and not be able to fix it without a major struggle. I was trying to mount them on a pair of cyclocross wheels. Just out of curiosity I then mounted one of them on a slimmer road wheel and it was not nearly as challenging. Was it the wider wheels of did I stretch the tire with the first mounting.? I still have not put any miles on the tires.