Tire size cross-reference

Vehicles with 275/45R21 tires

275/45R21 — 275 mm wide, 45% aspect, 21″ rim, 30.7″ overall diameter. 2 vehicles in our data use this size.

275/45R21 vehicles (30.7″ diameter)
VehicleTrim(s)Details
Ford Explorer ST View →
Jeep Grand Cherokee Summit/Summit Reserve View →

Same size ≠ same tire

Every vehicle above runs 275/45R21 tires, but they may need different load indices and speed ratings. A 275/45R21 tire rated for a sedan won't necessarily handle an SUV's weight. Match the full spec on your door-jamb placard — size alone isn't enough.

Other tire sizes

215/55R17 · 2 vehicles 225/60R17 · 2 vehicles 225/65R17 · 6 vehicles 235/65R17 · 7 vehicles 245/70R17 · 2 vehicles 245/75R17 · 2 vehicles 255/70R17 · 2 vehicles 265/70R17 · 5 vehicles 285/70R17 · 5 vehicles 225/45R18 · 3 vehicles 225/55R18 · 3 vehicles 225/60R18 · 4 vehicles 235/45R18 · 3 vehicles 235/60R18 · 9 vehicles 245/60R18 · 2 vehicles 255/65R18 · 3 vehicles 255/70R18 · 3 vehicles 265/60R18 · 2 vehicles 265/65R18 · 3 vehicles 265/70R18 · 3 vehicles All tire size tools →

FAQ

What vehicles use 275/45R21 tires?

In our data, 2 vehicles use 275/45R21, including Ford Explorer, Jeep Grand Cherokee. More are being added.

What is the overall diameter of 275/45R21?

275/45R21 tires have an overall diameter of 30.7″ (780.9 mm), with a 123.8 mm sidewall height. The section width is 275 mm.

Are 275/45R21 tires interchangeable between these vehicles?

They're the same physical tire size, so they'll fit the rim — but each vehicle may require different load ratings, speed ratings, and TPMS calibration. Always match the specs on your door-jamb placard, not just the size.

Vehicle lists reflect documented OEM tire fitments and are a starting reference. Confirm tire size, load rating, and speed rating against the door-jamb placard or owner's manual before buying tires.