295/35R19 vs 305/30R20
305/30R20 is a safe swap for 295/35R19 by the usual ±3% rule: the diameter differs by +0.28%.
Speedometer and odometer
With 305/30R20 on a car calibrated for 295/35R19, the speedometer reads 59.8 mph when you're really doing 60, and the odometer under-counts by 0.3%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.1 mph |
| 45 mph | 45.1 mph |
| 60 mph | 60.2 mph |
| 70 mph | 70.2 mph |
| 80 mph | 80.2 mph |
Other sizes close to 295/35R19
- 295/35R19 vs 235/50R18+0.45%
- 295/35R19 vs 245/45R19+2.03%
- 295/35R19 vs 245/40R19-1.52%
- 295/35R19 vs 235/40R19-2.68%
- 295/35R19 vs 255/40R19-0.36%
- 295/35R19 vs 255/35R19-4.06%
- 295/35R19 vs 255/45R19+3.34%
- 295/35R19 vs 275/35R19-2.03%
- 295/35R19 vs 275/40R19+1.96%
- 295/35R19 vs 255/35R20-0.38%
- 295/35R19 vs 225/40R19-3.85%
- 295/35R19 vs 225/45R19-0.58%
Questions
Can I replace 295/35R19 with 305/30R20?
305/30R20 is a safe swap for 295/35R19 by the usual ±3% rule: the diameter differs by +0.28%.
What's the difference between 295/35R19 and 305/30R20?
305/30R20 is 0.07" taller and 10 mm wider; the sidewall is -0.46". At an indicated 60 mph you'd actually be doing 60.2 mph.
Will 305/30R20 fit on 295/35R19 wheels?
No — 295/35R19 needs a 19" wheel and 305/30R20 a 20" wheel. This is a plus/minus-size swap that changes wheels too.