295/75R16 vs 305/70R16

295/75R16 is 0.6" taller than 305/70R16 (1.8%)

Diameter difference−1.83%diameter 33.42" → 32.81"
295/75R16305/70R16
295/75R16305/70R16Difference
Overall diameter33.42"32.81"−0.61"
Section width11.61"12.01"+0.39"
Sidewall height8.71"8.41"−0.31"
Circumference105.0"103.1"−1.9"
Revolutions per mile603615+11
Wheel diameter16"16"±0"

Speedometer

ShowsActualDiff
30 mph29.5 mph−0.5
45 mph44.2 mph−0.8
60 mph58.9 mph−1.1
70 mph68.7 mph−1.3
80 mph78.5 mph−1.5

Gear ratio to match

CurrentEquivalent
3.423.36
3.553.49
3.733.66
4.104.03

305/70R16 is 0.61" shorter than 295/75R16, a −1.83% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.31" (half the diameter change), and the tire needs 0.31" less room above it.

305/70R16 is 0.39" wider. On the same wheel offset about half of that, 0.20", moves toward the suspension and half toward the fender.

Both fit a 16" wheel; the sidewall is 0.31" shorter on 305/70R16.

Details: 295/75R16 in inches · 305/70R16 in inches · change sizes in the calculator

FAQ

What is the difference between 295/75R16 and 305/70R16?

305/70R16 is 0.61" shorter (−1.83%) and 0.39" wider than 295/75R16.

Will 305/70R16 change my speedometer?

Yes, by −1.83%. When the speedometer shows 60 mph you would be going 58.9 mph.

Can I replace 295/75R16 with 305/70R16?

Often yes: the diameter change of −1.8% is within the common 3% guideline. Check the load index, speed rating and clearance.