# What Does The R Stand For In Tire Size?

## What does R and Zr mean on tires?

ZR tires includes the speed ratings V(149mph), W(168mph) and Y(186mph).

## Is 70 or 75 a wider tire?

70 (or 75) is the ratio of the width to the sidewall height. So a 75 will be a taller tire, and closer to the height of the 6.70×15.

## Are 65 tires wider than 70?

According to the Generic Auto Tire FAQs in Type2’s Technical Library, the shorter sidewall of the series 65 tire means a slightly wider tire that changes the car’s handling considerably; specifically, “more rubber on the road provides a better grip.” The series 65 provides better turn-in and stability compared to the …

## Is a 60 series tire wider than a 70 series?

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.

## What does 70 R mean in tire size?

Some may start with an LT prefix, used on heavy-duty trucks. The number 235 is the cross-section width in millimeters, while 70 is the ratio of sidewall height to cross-section width (70 percent). R means radial-ply construction and 16 is the wheel diameter, in inches.

## What does 55 R mean on a tire?

55 is the two-figure aspect ratio. This percentage compares the tires section height with the tires section width. For example, this aspect ratio of 55 means that the tires section height is 55% of the tires section width. R indicates the construction used within the tires casing. R stands for radial construction.

## What do the 3 numbers mean on tire size?

B: TIRE WIDTH The three-digit number following the letter is the tire’s width (from side to side, looking at the tire head on) in millimeters. … In other words, it’s sidewall height divided by tire width. In this example, the aspect ratio is 65, meaning the sidewall is 65 percent as high as the tire is wide.

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

Both fit 17 inch rims, so one obstacle is out of the way. 235/65R17 has a sidewall height of 153 millimeters (65% of 235 mm), while 225/60R17 has a sidewall height of 135 mm (60% of 225 mm). … You are reducing sidewall height by 18 mm (about 3/4″), so your car will be lower by this amount.

## What is the difference between a 225 and a 235 tire?

225 is width from sidewall to sidewall. 60 is aspect ratio. It would mean the tire’s sidewall is 60% as high as it is wide. does that indicate a 235 mm tire is 10 mms wider.

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

You could, and the 225/65R17 tire will fit your existing rims, but you don’t want to do so. The lesser 225mm width tire offer a narrower tread contact patch, as well as potentially a lesser load carrying capability, depending on model of tire.

## Are wider tires better?

Larger tires improve handling and cornering, due to wider tread faces and stiffer sidewalls. … Wider tires may also increase acceleration, especially in very powerful vehicles such as muscle cars. Larger wheels with lower profile tires are sometimes aesthetically desirable.

## What does 75 on a tire mean?

The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.

## Can I use 235 tires instead of 225?

235/45 tires have a sidewall height of 105.75mm. The 225/45 tires will be shorter and will cause his speedometer to read higher than true. So short answer: Yes the tires will fit. They will, however, throw off your speedometer and will make the miles come onto the odometer faster.

## Can I put wider tires on my stock rims?

To keep the suspension and speedometer functioning correctly, both the stock diameter and width of the wheels and tires needs to be maintained. As a general rule of thumb, it’s safe to fit a tire up to 20 millimeters wider than stock on the original rim.

## What does XL mean on a tire?

extra load tiresThey can carry heavier loads than tires of the same size. Reinforced tires are designated on the sidewall by the letters “RF”; extra load tires with the letters “XL.” Reinforced and XL tires require higher inflation pressures than standard tires.