Tire Size Calculator

Alternative Tire Sizes Tire Comparison
Size A    /  R
Size B    /  R

Find
Metric
Inches
Alternative Tire Sizes for 245/30R21


680.7
246.4
2139
74
533.4
Size Diameter Difference Width
245/30R21 680.7 0.00% 246.4
295/25R21 680.7 0.00% 294.6
255/30R21 685.8 +0.75% 254.0
265/30R21 693.4 +1.87% 264.2
275/30R21 698.5 +2.61% 274.3