Xelloss99
Member
The Michelin X-Ice XI3 235/45R18 XL 98H that I have are listed on the Michelin site as weighing 23.15 lb which is 2 pounds lighter than the MXM4 so my assumption that the tires are similar weight is incorrect. The MXM4 was straight off the car and may have had some dirt and small rocks imbedded in the tread while the X-Ice were fresh and uninstalled. Both had TPMS (Stock had Tesla TPMS, R187 had generic TPMS). The R187 had the Tesla center cap installed in it. All told, with the crude measurement I did on the one pair of tires, the R187 seem to be somewhere around 3 lb per wheel heavier if given the same tire. For my purposes the R187 plus XI3 was close enough to the stock rims plus aero caps plus MXM4 to not worry that much.