Q: Tire size change

asked by on

Hello.. I have a 1999 Chevy Venture. Right now the stock tires on it are 215 /70 R15 I'm buying all new tires and I'm trying to save money. Can I replace those with 205 /70 R15 with out any problems?
My car has an automatic transmission.

There are some differences in the two tire sizes and I will go through some of them for you.

See the table below for differences in dimensions:

’Differences

Speedometer Differences

Speedometer Reading / Actual Speed

20 mph / 19.59 mph
25 mph / 24.49 mph
30 mph / 29.38 mph
35 mph / 34.28 mph
40 mph / 39.18 mph
55 mph / 53.87 mph
65 mph / 63.67 mph

Besides the above differences you will notice a drop in fuel mileage of about 1 to 2 miles per gallon since the new tires are smaller and the engine will have to run faster to go the same speed. The new tires will obviously also appear smaller when looking at the vehicle. Have the new tire stood up next to the vehicle when you get to the tire store before installing to see the difference in height.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Tire size change

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: Anti-theft system in 2006 Chevrolet Aveo not turning off

Hi. The key fobs have internal batteries that eventually wear out and must be replaced. Have a mechanic replace the battery and if that doesn't address the problem, I would recommend having a mechanic from Yourmechanic take a look at...

Q: By pass a/c compressor

Dorman sells aftermarket brackets, including a pulley, to bypass the compressor. If you install such a bracket you don't have deal with the inconvenience of changing the serpentine belt. In your application, you would probably use Dorman Air Conditioner Bypass...

Q: Hard shifting when engine warms up

Hello there, many different things that can cause the transmission to shift hard. The most common causes include: low fluid level, shift solenoids, torque converter, or the transmission linkage. If you decide to get this fixed, consider enlisting a qualified...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...