Skip the auto shop - Our mechanics make house calls

Q: Tire interchange

asked by on

I currently have r205/70 r15 tires and I was just given new r205/60 r15....will these work?

My car has 128 miles.
My car has an automatic transmission.

A: No, the most important thing when changing ...

No, the most important thing when changing tire or wheel size, is to keep the overall diameter the same. 205/70/15 is 26.3 inches and 205/60/15 is 24.7 inches. When you change the diameter, the final drive gear ratio is changed. This will affect the speedometer accuracy and how the transmission shifts. This also affects ground clearance, yours will be lowered by about 3/4 of an inch. In PA, and possibly in other states, it will not pass the inspection with a size that is smaller than original. Stay with the recommended size.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: can a heater core prevent, air conditioning, from blowing cold?

The heater core will not cause the A/C to not blow cold. If your A/C is working properly with the correct amount of refrigerant, then you may have a temperature blend door not working and staying on heat mode. If...

Q: Diesel pump not spraying diesel into the injector

Hi there. I would first check to be sure that the injector pump itself is getting diesel. Sometimes these pumps fail due to the fuel not being delivered to the injection pump sufficiently. I would also check to be sure...

Q: Is there a model number, etc. on my car tire that can help me find its speed rating and load index (service description)?

Your tires are an essential part of your vehicle. They can affect it in so many different ways. Not only are they a component that we can expect to spend money on over time, but they also have a huge...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...