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.
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). ... Most boat trailer tires have a load range of B, C, or D.
What size are boat trailer tires?
| 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 |
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What tires should I put on my boat trailer?
For towing boat trailers, we recommend using radial tires . Radial tires flex more than bias ply tires, which means better traction on pavement. Radial tires also run cooler and last longer than bias ply tires under heavy loads when hauled long distance.
Can you use regular tires on a boat trailer?
The main thing that separates the two kinds of tires is the strength of the sidewall on trailer tires. Ordinary tires have caused many a blowout on inconvenient times on road trips. ... All these facts combine into information that will lead you to decide not to use tires other than ST tires on your boat trailer.
What is the most popular size trailer?
- 5′ X 8′ — The smallest ATV trailer is one of the most popular, allowing you to haul 1 ATV at a time.
- 12′ & 14′ Single Axle Utility/Landscape Style Trailers — Another common size, this single axle trailer lets you haul up to 2 ATVs at once, depending on the size of your individual ATVs.
What size is a 15 inch trailer tire?
| Letter Size Metric Size Overall Diameter | F78-15 G78-15 205/75-15 27.1 inches | H78-15 J78-15 225/75-15 28.4 inches | – 7.00-15LT 29.4 inches | – 235/80-16 30.9 inches |
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Can I put bigger wheels 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 . ... Larger tires will typically have a higher weight rating. Tires with a higher weight rating will not increase the load carrying capacity of the trailer, so you will still be limited to the weight capacity of the axle.
Which is better Load Range C or D?
A load range D tire has the same load capacity as a load range C tire if it is inflated to 50 psi and will provide the same ride characteristics. Load range D tires only provide more capacity and a harsher ride if they are inflated to the higher-rated design pressure.
How long will boat trailer tires last?
Each tire manufacturer will likely have different recommendations on the service life of a particular type of tire, but statistics suggest the average life of a trailer tire is about five years under normal use and maintenance conditions, and that tire replacement should be considered after three years, even if the ...
What PSI should my boat trailer tires be?
Boat-trailer tires require a lot of air pressure — in most cases, between 50 and 65 psi . In fact, the correct tire pressure for your boat trailer is almost always the maximum-rated pressure for that tire, which is molded right on the sidewall. Maintaining that trailer tire PSI is critically important to towing safety.
Can I add an axle to my boat trailer?
You could add a second axle to a trailer that doubles its axle capacity but this does not ensure the other parts of the trailer, such as its frame or coupler, have that same doubled capacity.
Are bias ply tires better for trailers?
Bias ply tires have stiffer sidewalls , so if your rig tends to sway, they may help reduce this problem. They also have advantages for carrying heavy loads. ... However, oxidation, not tread wear, wears out trailer tires.
Why are pontoon trailer tires so small?
The simple answer is because that’s what they use on all their trailers . Be it the small lightweight ones or big heavy duty ones. They don’t generally stock larger tires, so you don’t have a choice. I also fault the marine dealers who sell a trailer like this.
What is Load Range D on trailer tires?
The D load range is rated for 2,540 pounds at 65 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.
