QA

Does Tire Aspect Ratio Affect Speedometer

Re: Change in tire aspect ratio affect speedometer? Quick answer: yes, but not much. Longer answer: Overall diameter of the tire is what will affect your gearing and speedometer. Changing just the aspect ratio will affect the diameter of the tire.

Can I use tires with different aspect ratio?

Can I Change Tire Sizes? That said, the only dimensions you can change are the width and aspect ratio — never the wheel size, unless you buy replacement wheels — and you should always strive to keep the total height of the tire the same as the OEM.

Does the tire aspect ratio matter?

Aspect ratio is an important sizing calculation in tire fitting, and should be considered with wheel diameter with the best tire and wheel combinations. Lower aspect ratio typically indicates a high performance tire, with better lateral stability.

Can tire size affect speedometer?

Up-sizing, or installing a taller tire, will lead to a speedometer reading that is slower than your actual speed. This is because a taller tire will have a larger overall circumference, causing it to need to travel more distance per revolution than the original equipment tire.

How far off is my speedometer with bigger tires?

When you go to bigger tires the circumference of the tires is larger, meaning the distance around the tire is longer. Thus, with each revolution you are traveling further than before. Therefore your actual speed is higher than your speedometer reads. Or lower if you have gone with a smaller tire than stock.

Can I use 235 tires instead of 225?

Are 225 and 235 Tires Interchangeable? Yes, they are. However, this is only possible if your car’s rims can accept the larger millimeter.

Can I use 225 tires instead of 215?

Yes, you can. But only if the rims on your car can accommodate tires that are 10-20 millimeters wider. Bear in mind that wider wheels require more fuel due to their increased rolling resistance. Again, wider tires are more costly than narrower ones because they need more rubber during construction.

What is a good tire aspect ratio?

The aspect ratio is a percentage of the section width. So if you have a 70-series tire, that means the sidewall height is 70 percent of the tire’s overall width. Aspect ratio for most bias ply tires is somewhere around 80 or 90 percent.

What tire is wider 60 or 70?

Generally speaking, a 215-60 series tire is wider and has a shorter sidewall then a 215-70 series tire would be and a 215-75 series tire would be taller and narrower then either the 70 series or the 60 series. The 215 designation would be the amount of weight the tire can carry at a given tire pressure.

Can I use lower aspect ratio tires?

If you put lower aspect ratio tire on the same diameter wheels, you need to compensate with a wider tread width in order to have the same overall tire diameter and keep speedometer and ECU accurate. So long as you go with wider tread too, you can go as low an aspect as will fit your wheel’s width.

Do bigger tires use more gas?

For example, larger tires decrease your fuel economy because they are heavier, while smaller tires increase fuel efficiency. Bigger tires also have a higher rolling resistance than smaller tires which means they require more resistance and effort to get them rolling.

How much does it cost to calibrate a speedometer?

Most speedometer calibrations will cost about $50-100 but some places charge more. You do not necessarily get what you pay for when it comes to calibrations. Calibrations checks should not take a lot of time. The auto body shop will hook your vehicle up to the dynamometer, and measure the accuracy of your speedometer.

Can you recalibrate a speedometer?

Electronic speedometers are easy to calibrate. Manufacturers always provide the distance of the test drive needed for speedometer calibration. This information is normally available in the owner’s manual. Identify the speedometer calibration button and press-hold, crank your vehicle and then release the button.

How much can a speedometer be off?

Dan Edmunds, an automotive engineer and the director of vehicle testing at Edmunds.com, says that speedometers cannot have an error of more than 5 percent (typically expressed as plus/minus 2.5 percent relative to the actual speed) according to federal law.

Will changing wheel size affect speedometer?

Changing tire size is one of the most common things car owners do that can affect speedometer accuracy. That’s because larger tires cover more ground in one complete revolution. This has a tremendous affect on your speedometer, which will now indicate a speed that is too slow by almost 13 percent.

Can I use 235 55r17 instead of 225 65r17?

Registered. 235 will fit width wise, if the rim is the correct offset. You will loose ~1.4″ in diameter going to the 55 though. Your speedo will be off.

Can I use 225 55r17 instead of 225 65r17?

The difference in the dimension of the two tyres is purely in the aspect ratio of the sidewall so the /65 tyres will have a bigger sidewall (note that the number is 65% of the width, not 65 somethings – i.e. 165.75mm vs 140.25mm and that’s effectively doubled because you’re taking radius, not diameter) and therefore May 16, 2019.

Can I use 225 60R17 instead of 235 65r17?

Not safely, no. If you go to a narrower tread width tire you will want to increase the sidewall height aspect ratio exponentially. The shorter sidewall 225/60R17 tire will not provide the needed load carrying capability needed for your vehicle.

Can I use 215 65r16 instead of 225 60R16?

They’ll definitely fit alright I even ran 215/60/16s (rather than standard 245/50/16s) on my factory 16×8 Firebird wheels in the winter without a problem.

Can I use 215 50r17 instead of 225 50r17?

To be honest, the difference between the two are so slim you’re not going to notice any real advantages / differences. Your speedometer is going to be slightly off and you’re going to be paying more for the 225/15’s (larger tire, more rubber = increased price). The choice is up to you.

Can I use 225 60R16 instead of 225 65r16?

There is approximately 11 mm difference between the two tires overall outside diameter. You definitely aren’t going to hurt anything, you’ll be fine so long as all 4 tires are the same size.