245/35R21 vs 275/35R21
275/35R21 is 3.0% taller (+0.83 in) and 1.18 in wider than 245/35R21.
275/35R21 is 3.0% taller than 245/35R21. That is inside the ±3% most shops treat as a straight swap.
Real speed on 275/35R21.
Change in height under the axle.
On the same wheel, split inboard and outboard.
Shop 275/35R21 tires
Opens the store’s own searchPrices and stock change often, so check a few stores. We don’t earn anything from these links.
245/35R21 or 275/35R21?
Can I use 275/35R21 instead of 245/35R21?
275/35R21 is 3.0% taller than 245/35R21. That is inside the ±3% most shops treat as a straight swap. Also match or beat the original load index and speed rating, and check that the wheel width suits the new tire.
Will my speedometer be off?
At an indicated 60 mph on 275/35R21 you are really doing 61.8 mph if the speedometer was set up for 245/35R21. Going the other way, 245/35R21 would make it read 58.3 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +0.41 in (+11 mm) under the axle.