Ever hopped on your car and noticed the numbers carved on your tires? Did you know what those numbers mean?
The numbers from your tires mean a lot of significant information. It could be related to sizes or expiration dates.
Though, what we are about to discuss here is the difference between size 235 and 245 tires.
Remember that markets have variants of sizes to choose from, but it is important to identify what these numbers mean and which size is compatible with them.
Tire Size 235
Size 235 tires have many measurements, but let’s take the P235/70R16 code as an example. We’ll elaborate on the meaning of these numbers and letters marked from your tire.
In talking about the first prefix “P”, it means “Passenger-car tire” which is commonly used. Aside from that, other tires have prefixes T (Temporary Spare), LT (Light Truck), and ST (Trailer).
Talking about tire size 235, it serves as a measurement in millimeters from the cross-section width.
The number 70 that comes after the slash is the aspect ratio. It indicates that the sidewall’s height cross-section width is in the ratio 70 (percent).
Through the aspect ratio, you can specify the distance from the wheel-rim that mounts the surface into the outside tread.
While the R signifies the “radial-ply construction” type of tire. Others may have D “Diagonal” type or the old-fashioned bias-ply tire that’s frequently used on trailer trucks.
Lastly, the number 16 signifies that the wheel’s diameter is in inches.
Tire Size 245
If your tire has a code 245/75R16 it means the following:
The 245 size indicates the cross-section width of the tires in millimeters when it is already mounted on the wheel. A standard size it can vary is between 125 and 335 mm.
The 75 (percent) tells the aspect ratio from the height and width of the tire. It simply means that the height of the sidewall starting from the edge to the tread measures up to 183 millimeters. Take note, a lower percentage means the tire has a better grip on the road.
The prefix “R” or radial is the standard construction method in almost 99% of tires that are out in the market. It extends its cord across the casing from the bead or heel to the bead.
And the tire’s size is designated to fit on wheels 16 inches in diameter. Aside from that, there are also 10 and 23 inches.
Can you replace a 245/75R16 with 235/70R16?
A lot of vehicle owners are not experts in examining the different sizes of tires. One of the frequent questions involves replacing the tire size 245 with 235.
Note that before changing a tire, it is important to calculate if the available tire suits your car. Research from engineers and car experts has made a tire calculator that is available online.
It indicates whether it is safe to replace an original tire with a different size. Let us say you have an old tire size 245-75R16, calculate it with new 235-70R16 tire size, and these are the results:
The overall diameter from the old tire is 744 mm while the new has 755 mm, with a difference of -38 or 5%. In selection width, there is a -10 or -4% difference between 245 mm old tire and 235 mm new tire.
The circumference parameter, the difference between 2431 mm (old) and 2310 mm (new) is -121 mm or 5%.
For the sidewall height, there is a -19 (10 %) difference from the old tire of 184mm and 165 mm new tire size. On the Revs per km, 411 and 433 resulted in +22 (+5 %).
Lastly, the clearance changes to 20 mm. The interpretation for this is that the diameter differs by more than 3%, which means if the speedometer reads 60 km/h, the actual speed is 57.0 km/h.
What are the sizes often compared to 235/70R16?
These are the tire sizes typically compared with 235/70R16 because its overall aspect is almost the same or has only a few percent dissimilarities: 265/70 R16, 265/75 R16, 205/50 R15, 285/75 R16, 245/70 R16, and 285/60 R18.
Cars from several brands have 235/70R16 as their standard tire size, however, it is only for a specific model on a specific company which would best consult a mechanic for further assistance.
Here is a list of some cars with a factory tire size of 235/70R16 are Chevrolet, Dodge, Ford, Hyundai, Jeep, Mazda, Mitsubishi, Mercury, etc.
What are the sizes often compared to 245/75R16?
These are the tire sizes typically compared with 245/75R16 because its overall aspect is almost the same or has only a few percent dissimilarities: 245/70 R16, 225/75 R16, 235/70 R16, 265/75 R16, 235/75 R16, 265/70 R16, 205/50 R15, 235/85 R16, and 255/70 R16.
Cars from several brands have 245/75R16 as their standard tire size, however, it is only for a specific model on a specific company which would best consult a mechanic for further assistance.
Here is a list of some cars with a factory tire size of 245/75R16 are Chevrolet Express, Cadillac, Dodge Tire, GMC, Jeep, Mazda, Toyota, Mercedes-Benz, and many more.
So you have already identified the difference between 235 and 245 size tires. It is obvious that 245 is bigger than 235, still, both tires’ sizes are pretty common and could be interchangeable at times.
Lastly, planning to change tires, you should bring it to a mechanic to have an accurate calculation and they could provide you the best size to fit your vehicle.