What size are boat trailer tires?

8 – 9 – 10 – 12 – Inch Trailer Tire Sizing

Older Size	Tire Size	Overall Diameter
16.5 x 6.5 – 8	165/65-8	16.5 inches
18.5 x 8.5 – 8	215/60-8	18.3 inches
–	6.90/6.00-9	21.1 inches
–	205/50-10	18.3 inches

Are all boat trailer tires the same?

Every tire has a load range, and trailer tires are no different. Marked on the sidewall, the load range runs from the lightest weight the tire can carry (Load Range B) to the heaviest (Load Range E).

What tires should I put on my boat trailer?

Special Trailer (ST) tires are the only type you should use on your boat trailer unless you’re willing to risk damage or potentially an accident. ST tires have robust sidewalls to handle lots of weight, which helps avoid tipping your boat onto the road while cornering turns.

How do I know what size my trailer tires are?

Measure aspect ratio from the top of the trailer rim to the top of the tire. In our example, ST225/75R15, this is the second number or 75. This stands for the number, as a percentage, to subtract from the section width, which results in the value of the trailer tire’s section height.

What size tire is 5.30 12?

The 5.30-12 tire that you currently have has a section width of 5.3 inches and has a diameter of 21.9 inches. The ST145/R12 size tire that you are wanting to replace it with has a section width of 5.7 inches and has a diameter of 21.3 inches.

What is the difference between R and D trailer tires?

R indicates a radial tire — D indicates a Bias ply tire D is for diagonal. The sidewalls will flex differently. The radial tire should run a little cooler . Also a radial tire the same size as a bias ply tire should have a larger contact area where the tire meets the pavement because of the design .

Can I put bigger rims on my boat trailer?

You can add larger wheels and tires to a trailer as long as you have enough room for the larger size. The main clearance issues we find when putting larger tires and wheels on a trailer is from the top of the tire to the fender and from the inside wall of the tire to the trailer wall/frame.

What is the difference between 4 ply and 6 ply trailer tires?

Registered. The 6 ply tires are significantly heavier than the 4 ply, meaning you have more rotational mass with the 6 ply tires. They are more cut resistant than most of the 4 plys though. I have raced MX and SX on my 6 ply tires, and only really notice a small difference between both tires.

Can you use car tires on a boat trailer?

So can you use car tires on a boat trailer? The general answer is yes, but this is one of those cases where just because you can do it does not mean you should. A trailer, especially a boat trailer, is a piece of specialized equipment designed to do only its intended job.

Are boat trailer tires balanced?

Since the primary duty of a trailer tire is supporting a vertical load, rather than gripping an automobile through turns, trailer tires do not have to be dynamically balanced like passenger car tires do. Steering and cornering are less of a concern on a trailer tire than they are on an automotive tire.

What does st205 75R15 mean?

This number indicates that your tire has a width of 205 millimeters. 75. This number means that your tire has an aspect ratio of 75%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 75% of the width. In this case, the sidewall height works out to be 153 millimeters.

What size are my trailer wheels?

etrailer | Trailer Wheel Measurements – YouTube

https://www.youtube.com/watch?v=b3Whzrki2EU

How do you measure a boat trailer wheel?

Expert Reply: To measure the width of a trailer wheel you will measure from where the tire beads will seat on the wheel. That will be from the inside of the inner wheel flange to the inside of the outer wheel flange, not from edge to edge of the wheel.

What is the difference between 480 12 and 530 12 trailer tires?

A 4.80-12 tire will be 20.5 inches in diameter whereas a 5.30-12 tire will be 21.9 inches. You would need to make sure that the is more than 3/4 of an inch above the 4.80-12 tire to be able to use a 5.30-12. The smaller 4.80-12 is 4.9 inches wide. The 5.30-12 is 5.6 inches wide.

What does 5.30 mean on a tire?

A 4.80-12 tire/wheel when fully inflated will have a diameter of 20-1/2-inches while the 5.30-12 size will be just under 22-inches in overall diameter.

How tall is a 4.8 x12 tire?

Additional information

Weight	9 lbs
Dimensions	21 × 5 × 21 in
Height/Ratio	20.07
Rim Diameter	12
Width	4.8

What is the difference between ST205 75R15 and ST225 75R15?

Expert Reply: An ST205/75R15 tire size like you have now will have a section width of 8.1 inches and overall diameter of 27.3 inches. An ST225/75R15, # AM10256, will have a section width of 8.9 inches and overall diameter of 28.4 inches. So the larger size is 0.8 inches wider and 1.1 inches taller.

Can I put radial tires on my trailer?

How To Choose Trailer Tires – Radial or Bias – YouTube

What does D15 mean on a trailer tire?

The R15 is a Radial tire and the D15 is a Bias Ply tire.

What is the most common trailer tire size?

For example, a common trailer tire size is ST225/75R15. ST stands for special trailer and indicates that this tire is designed to be used on a trailer. 225 is the width of the tread in millimeters. 75 is the height of the sidewall represented as a percentage of the tread width.

Can I put 15 inch tires on my trailer?

Yes, you can change trailer wheel size from 13 inch to 15 inch on the same axle if that axle isn’t a 2000 lbs axle. Most 2000 lb axles are not rated to use a 15 inch tire.

Does trailer tire size matter?

Simple physics: Wider tires = more road resistance = more power required to pull = lower MPG while towing. Trailer builders use smaller tires to save weight and cost.

How can I tell what ply my trailer tires are?

How to Find Out Your Tire Ply Rating – YouTube

Which is better 6 ply or 8 ply tires?

An 8 ply tire vs a 6 ply would have more capacity and run cooler, hopefully lasting longer. If you have plenty of excess weight capacity on the current tires, an 8 ply would probably be a waste of money.

Which is better 6 ply or 8 ply?

Actually the 6 ply will last longer than the 8 ply. The reason is the extra size of the body plies in a trailer tire will actually produce more heat while rolling than a 6 ply rated tire.

Can you use LT tires on trailers?

Are LT Tires Safe for Trailer Use? LT tires are intended for vehicles that generate stress with heavy loads—pickups, commercial vans, and heavier SUVs. Their stability makes them ideal for mounting on a tow vehicle.

How can you tell if a trailer tire is good?

The indicators are the raised sections with intermittent spacing in the bottom of the tread grooves. When these indicators appear even with the outside of the tread, it’s time to replace your trailer’s tires. You can also check this by placing a penny in the tread depth with Lincoln’s head upside down and facing you.

Can you run truck tires on a trailer?

The answer is they will fit but will not necessarily be safe. Trailer tires typically have higher load ratings and thicker sidewalls. Every tire has a load rating. The total of load rating on all your tires should not exceed the gross load weight of the trailer loaded.

Are you supposed to rotate trailer tires?

Trailers, just like vehicles, need their tires rotated too. To avoid mechanical problems both minor and major, it is recommended that you rotate your trailer tires.

Are trailer axles supposed to flex?

Expert Reply: While trailer axles do feature an upward bend like you are describing, there isn’t a particular amount/measurement that is standard across the board. This bend in the axle is designed so that it will straighten under a trailer’s loaded capacity.

Should I cover my trailer tires?

Protect Your Trailer Tires from the Sun, Whenever Possible

Over time, ultraviolet rays from the sun cause tire compound to break down. When parked outside, cover your trailer tires with tire wheel covers or UV reflective material.

What does AD stand for on a trailer tire?

This size tire is available as a ST205/75-D15 or as a ST205/75-R15. The D indicates that the tire is a diagonal bias ply construction and the R indicates that the tire is a radial tire construction. Beyond the size and type, there are load ranges for tires. Most trailer tires are load range B, C or D.

How tall are 225 75R15 tires?

225/75R15 tires have a diameter of 28.3″, a section width of 8.9″, and a wheel diameter of 15″. The circumference is 88.8″ and they have 713 revolutions per mile.

What is Load Range D on trailer tires?

The D load range is rated for 2,540 pounds at 65 psi. And the E load range is rated for 2,830 pounds at 80 psi. If you had a single axle trailer with a gross weight rating of 5,000 pounds, you would use the D or E tires in this size since the C tires would be under rated for the weight.

Are all 6 lug trailer rims the same?

The vast majority of trailer wheels with a 6 bolt lug pattern will have a spacing of 5-1/2″ whether that be on a 15″ or 16″ diameter wheel. However, in order to be certain you can measure which is pretty easy to do using the attached help article.

Can you run two different size tires on a trailer?

An important point of consideration is when using two different size tires, the load has to be no more than the capacity of the lowest rated tire. With this substantial difference with both weight capacities and inflation levels, the chances of inadvertently overloading on the smaller side tire is quite possible.

Are all 5 lug trailer wheels the same?

While a 5-Bolt on 4.5″ is standard and by far the most common among trailer wheel 5-bolt patterns, there are times in which the trailer manufacturer uses a different pattern such as 5 on 5″.

Are all 4 lug trailer rims the same?

Determining the bolt pattern on your trailer:

You will need to first count the number of lug bolts on one wheel. Most trailer hubs typically have 4 or 5 lugs per wheel/hub. Heavier duty, higher capacity trailers generally have 6 or 8 Lugs per wheel.

What size is my trailer hub?

How To Determine Your Trailer Hub Size – YouTube

How do you measure the width of a trailer rim?

The width of a trailer wheel is measured from the inner edge of a bead to the inner edge of the other bead. If you take this measurement it should be 5 inches on your wheel.

What does 4.80-12 mean on a tire?

asked by: Bud. Expert Reply: Yes, a 4.80-12 trailer tire uses a 12 inch diameter wheel that is 4 inches wide. The 4.80 spec is the width of the tire.

What size is a 4.80 8 tire?

4.80/4.00-8″ Pneumatic Tire

Tire Type	Pneumatic
Tire Size	4.80/4.00-8″
Tire Diameter	15.5″
Tire Width	3.9″
Rim Diameter	8″

How wide is a 4.80 8 tire?

The 4.80 x 8 tire size like the Kenda K371 Bias Trailer Tire, part # AM10004, is 16.1 inches tall and the overall width is 4.6 inches.