18″ comparisons
18-inch tire comparisons
The most useful side-by-side comparisons involving 18-inch wheels — including same-rim width changes and plus-size upgrades. Each link shows diameter difference, speedometer drift and a fitment verdict. Open the speedometer calculator →
245/45 R18 vs 275/40 R18
Δ 0.07% • rim Δ 0
235/45 R18 vs 265/40 R18
Δ 0.07% • rim Δ 0
215/40 R18 vs 245/35 R18
Δ 0.08% • rim Δ 0
255/50 R19 vs 255/55 R18
Δ 0.01% • rim Δ 1
255/40 R19 vs 255/45 R18
Δ 0.01% • rim Δ 1
255/35 R19 vs 255/40 R18
Δ 0.02% • rim Δ 1
255/35 R18 vs 255/40 R17
Δ 0.02% • rim Δ 1
235/60 R18 vs 255/55 R18
Δ 0.20% • rim Δ 0
225/45 R18 vs 255/40 R18
Δ 0.23% • rim Δ 0
235/65 R17 vs 255/55 R18
Δ 0.05% • rim Δ 1
215/55 R17 vs 235/45 R18
Δ 0.06% • rim Δ 1
225/40 R18 vs 255/35 R18
Δ 0.24% • rim Δ 0
205/50 R17 vs 225/40 R18
Δ 0.06% • rim Δ 1
235/45 R18 vs 265/35 R19
Δ 0.09% • rim Δ 1
245/60 R18 vs 245/65 R17
Δ 0.12% • rim Δ 1
245/40 R19 vs 245/45 R18
Δ 0.13% • rim Δ 1
245/35 R19 vs 245/40 R18
Δ 0.14% • rim Δ 1
245/40 R18 vs 245/45 R17
Δ 0.14% • rim Δ 1
245/35 R18 vs 245/40 R17
Δ 0.14% • rim Δ 1
265/35 R19 vs 265/40 R18
Δ 0.16% • rim Δ 1
245/40 R19 vs 275/40 R18
Δ 0.21% • rim Δ 1
235/40 R19 vs 265/40 R18
Δ 0.21% • rim Δ 1
225/40 R19 vs 255/40 R18
Δ 0.21% • rim Δ 1
225/40 R18 vs 255/40 R17
Δ 0.22% • rim Δ 1
215/40 R18 vs 245/40 R17
Δ 0.22% • rim Δ 1
225/45 R19 vs 255/45 R18
Δ 0.23% • rim Δ 1
215/45 R18 vs 245/45 R17
Δ 0.25% • rim Δ 1
215/45 R18 vs 245/40 R18
Δ 0.38% • rim Δ 0
225/45 R18 vs 255/35 R19
Δ 0.21% • rim Δ 1
235/60 R18 vs 255/50 R19
Δ 0.22% • rim Δ 1
225/45 R17 vs 255/35 R18
Δ 0.22% • rim Δ 1
225/55 R18 vs 245/45 R19
Δ 0.23% • rim Δ 1
235/55 R19 vs 235/60 R18
Δ 0.26% • rim Δ 1
235/60 R18 vs 235/65 R17
Δ 0.26% • rim Δ 1
225/55 R17 vs 245/45 R18
Δ 0.24% • rim Δ 1
215/50 R17 vs 235/40 R18
Δ 0.25% • rim Δ 1
235/50 R18 vs 235/55 R17
Δ 0.28% • rim Δ 1
235/40 R19 vs 235/45 R18
Δ 0.28% • rim Δ 1
235/35 R19 vs 235/40 R18
Δ 0.29% • rim Δ 1
235/40 R18 vs 235/45 R17
Δ 0.30% • rim Δ 1
275/35 R19 vs 275/40 R18
Δ 0.31% • rim Δ 1
215/45 R18 vs 275/35 R18
Δ 0.15% • rim Δ 0
225/50 R18 vs 285/35 R19
Δ 0.01% • rim Δ 1
215/60 R17 vs 235/50 R18
Δ 0.35% • rim Δ 1
235/35 R19 vs 275/35 R18
Δ 0.40% • rim Δ 1
245/40 R18 vs 275/35 R18
Δ 0.54% • rim Δ 0
245/45 R18 vs 275/35 R19
Δ 0.38% • rim Δ 1
225/55 R18 vs 225/60 R17
Δ 0.41% • rim Δ 1
245/45 R17 vs 275/35 R18
Δ 0.40% • rim Δ 1
225/45 R19 vs 225/50 R18
Δ 0.43% • rim Δ 1
225/50 R18 vs 225/55 R17
Δ 0.43% • rim Δ 1
235/55 R19 vs 255/55 R18
Δ 0.46% • rim Δ 1
225/40 R19 vs 225/45 R18
Δ 0.44% • rim Δ 1
225/45 R18 vs 225/50 R17
Δ 0.44% • rim Δ 1
225/35 R19 vs 225/40 R18
Δ 0.46% • rim Δ 1
225/40 R18 vs 225/45 R17
Δ 0.46% • rim Δ 1
215/55 R17 vs 265/40 R18
Δ 0.13% • rim Δ 1
215/60 R17 vs 255/45 R18
Δ 0.45% • rim Δ 1
255/45 R20 vs 255/55 R18
Δ 0.03% • rim Δ 2
255/35 R20 vs 255/45 R18
Δ 0.03% • rim Δ 2
225/50 R18 vs 245/45 R18
Δ 0.66% • rim Δ 0
225/50 R18 vs 255/45 R18
Δ 0.66% • rim Δ 0
205/50 R17 vs 255/35 R18
Δ 0.17% • rim Δ 1
235/55 R18 vs 255/45 R19
Δ 0.50% • rim Δ 1
235/55 R17 vs 255/45 R18
Δ 0.52% • rim Δ 1
235/40 R18 vs 275/35 R18
Δ 0.70% • rim Δ 0
215/45 R18 vs 245/35 R19
Δ 0.52% • rim Δ 1
225/50 R18 vs 245/40 R19
Δ 0.53% • rim Δ 1
215/45 R17 vs 245/35 R18
Δ 0.54% • rim Δ 1
225/50 R17 vs 245/40 R18
Δ 0.55% • rim Δ 1
215/45 R18 vs 235/35 R19
Δ 0.55% • rim Δ 1
225/55 R18 vs 245/40 R20
Δ 0.10% • rim Δ 2
215/45 R18 vs 215/50 R17
Δ 0.60% • rim Δ 1
225/55 R16 vs 245/40 R18
Δ 0.11% • rim Δ 2
215/40 R18 vs 215/45 R17
Δ 0.62% • rim Δ 1
215/65 R16 vs 255/45 R18
Δ 0.12% • rim Δ 2
235/50 R18 vs 255/45 R18
Δ 0.79% • rim Δ 0
205/60 R16 vs 245/40 R18
Δ 0.12% • rim Δ 2
225/55 R18 vs 275/40 R19
Δ 0.30% • rim Δ 1
245/35 R19 vs 275/35 R18
Δ 0.68% • rim Δ 1
225/55 R17 vs 275/40 R18
Δ 0.31% • rim Δ 1
225/35 R19 vs 255/35 R18
Δ 0.69% • rim Δ 1
225/50 R18 vs 255/40 R19
Δ 0.64% • rim Δ 1
245/45 R18 vs 285/35 R19
Δ 0.65% • rim Δ 1
235/50 R18 vs 265/35 R20
Δ 0.19% • rim Δ 2
245/45 R18 vs 285/30 R20
Δ 0.19% • rim Δ 2
225/60 R16 vs 245/45 R18
Δ 0.19% • rim Δ 2
255/45 R18 vs 285/35 R19
Δ 0.67% • rim Δ 1
225/50 R17 vs 255/40 R18
Δ 0.67% • rim Δ 1
215/45 R18 vs 235/40 R18
Δ 0.85% • rim Δ 0
245/60 R18 vs 245/70 R16
Δ 0.24% • rim Δ 2
275/40 R18 vs 285/35 R19
Δ 0.72% • rim Δ 1
235/60 R18 vs 255/45 R20
Δ 0.23% • rim Δ 2
245/35 R20 vs 245/45 R18
Δ 0.27% • rim Δ 2
275/40 R18 vs 285/30 R20
Δ 0.27% • rim Δ 2
235/60 R16 vs 255/45 R18
Δ 0.25% • rim Δ 2
265/50 R20 vs 265/60 R18
Δ 0.28% • rim Δ 2
205/60 R16 vs 215/45 R18
Δ 0.26% • rim Δ 2
245/35 R20 vs 275/40 R18
Δ 0.34% • rim Δ 2
225/35 R19 vs 235/40 R18
Δ 0.79% • rim Δ 1