GL and offroading.
The manufacturer recommends them on anything from 8.5 to 10.5 inches for 275/45R21. They did the measurements on a 9 inch rim. The concern would be you would have limited hang over on your rim for protecting it from curbs. On the plus sde you would have half inch taller than stock tire. Oddly the 275/50R21 you wanted only say they fit up to 9.5 inch rim and measured on 8.5 inch rim.



