Baller jetpilotg4 Posted May 21, 2019 Baller Share Posted May 21, 2019 Whats a good tire pressure for a single axle Boat mate trailer loaded with SN 200? Link to comment Share on other sites More sharing options...
Baller ScottScott Posted May 21, 2019 Baller Share Posted May 21, 2019 look at the max rating stamped on the tire. I believe its likely 80? Link to comment Share on other sites More sharing options...
Baller dave2ball Posted May 21, 2019 Baller Share Posted May 21, 2019 I have a Ram -Lin single for a 200 and it’s 65 lbs. empty and cold. As mentioned before look at the tire rating. There no different then a car. Link to comment Share on other sites More sharing options...
Baller Wayne Posted May 21, 2019 Baller Share Posted May 21, 2019 It depends on the load range of the tire which will be on the side of the tire as ScottScott said. In general: load range C is 50 psi load range D is 65 psi load range E is 80 psi Link to comment Share on other sites More sharing options...
Baller skierjp Posted May 22, 2019 Baller Share Posted May 22, 2019 Don’t go by the tire. That is the max pressure. The trailer should have a tire placard near the tongue that will have the recommended tire pressure. It’s not as much as you might think. Link to comment Share on other sites More sharing options...
Baller oldjeep Posted May 22, 2019 Baller Share Posted May 22, 2019 Max sidewall pressure for full rated load capacity of the tire. Link to comment Share on other sites More sharing options...
Baller Wayne Posted May 22, 2019 Baller Share Posted May 22, 2019 @skierjp what if the trailer does not have the same load rating tires that the trailer manufacturer put on it? The sticker will be wrong. You always go with what is on the sidewall of the tire. Link to comment Share on other sites More sharing options...
Baller ScottScott Posted May 22, 2019 Baller Share Posted May 22, 2019 Its not like car tires. Some trailers are made specific for some boats, but some will take a variety of boats/weights. A lot goes into the specific tire pressure that car/trucks specify in terms of vehicle weigh/handling/tire ware etc. There's not a lot of downside with going to max psi. If the boat trailer weight is significantly below the combined tire's rating, maybe you could get some uneven wear (wearing the center more than the sides) but the downside to under-inflating is a blowout on the highway. Just go to the max rating on the tire. The amount of trailer use rarely wears the tread down before the tire is of an age it needs to be replaced anyway. Link to comment Share on other sites More sharing options...
Baller Jmoski Posted May 23, 2019 Baller Share Posted May 23, 2019 For the tire to carry the max load the tire is rated for it has to be at max PSI. As you drop the air pressure you proportionally drop the weight it can handle. Link to comment Share on other sites More sharing options...
Baller skiinxs Posted May 23, 2019 Baller Share Posted May 23, 2019 If the trailer is designed for the boat, go with the sticker pressure. To much air could abuse the boat with too stiff of a ride. Same deal with the tire pressure sticker inside the door of your car or truck, unless you are carrying more weight than normal on trailer or boat. Link to comment Share on other sites More sharing options...
Baller BCM Posted May 23, 2019 Baller Share Posted May 23, 2019 I have had several blow outs including the tow vehicle and a 15,000lb trailer. I will subject my boat to a slightly bumpy ride to prevent a blow out any day of the week. Fleet mechanics and tire guys have always told me, to best prevent a blow out, run the tire at the pressure stamped on the side wall. Under-inflated tires cause heat build up, heat build up causes blowouts. The pressure indicated on the sticker of my pickup is 80psi, the max pressure on the tires is 60psi, the current tires are rated to a higher weight than the stock tires. Link to comment Share on other sites More sharing options...
Baller oldjeep Posted May 23, 2019 Baller Share Posted May 23, 2019 @skiinxs - tires are not suspension. The trailer has springs or torsion arms for a reason. In general the stock tires on boat trailers are at or above their max limit the day you pick the boat up. The 4 C rated tires on my trailer were replaced with D rated and I inflate them to max as well. Link to comment Share on other sites More sharing options...
Baller jetpilotg4 Posted May 23, 2019 Author Baller Share Posted May 23, 2019 Speaking of blowouts This was last year, old set of tires Link to comment Share on other sites More sharing options...
Baller_ Bruce_Butterfield Posted May 23, 2019 Baller_ Share Posted May 23, 2019 I had a rather bad experience with trailer tires and multiple blowouts within a few hundred miles. Finally got to a tire shop with a guy who knew what he was doing and he said you will never wear out a trailer tire - after 4 years, chuck ‘em. I’ve tried to push for that 5th year three times and the 4 year rule was proven each time. If it was easy, they would call it Wakeboarding Link to comment Share on other sites More sharing options...
Baller skiinxs Posted May 23, 2019 Baller Share Posted May 23, 2019 @Bruce_Butterfield totally agree with that statement. Most boat trailer tire blowouts (at least on ski boats, not 4 ton barges) are from dry rotted tires. Link to comment Share on other sites More sharing options...
Baller skierjp Posted May 23, 2019 Baller Share Posted May 23, 2019 The placard on the trailer is for the stock tires it came with. Run what the placard says to run. If you change tire ratings then the placard is no good. Those who think you run what the sidewall says are wrong. Car & Driver and Trailer Boat Magazine have articles explaining this. Watch your tire pressure monitoring system on your vehicle and you may be surprised at how the tire pressure changes as the tires warm up. Link to comment Share on other sites More sharing options...
Baller TomH Posted May 23, 2019 Baller Share Posted May 23, 2019 If you want/need the stated capacity of the trailer tire, you need to run it at the capacity on the tire sidewall (cold max inflation pressure). If your load is well below the load ratings of the tires, then feel free to run differently, but it's common knowledge that the maximum load rating for trailer tires is only achieved when they're inflated to the maximum listed on the sidewall. Yes, pressures will change when the tire is hot/in use, but that's accounted for by the tire manufacturer, and why they list the maximum cold inflation temperature. Link to comment Share on other sites More sharing options...
Baller Jmoski Posted May 23, 2019 Baller Share Posted May 23, 2019 I suspect most if not all ski boat trailer manufacturers (like mine) have the placard listing the max cold PSI for the tire they put on it. The manufacturers are not going to spend more money for higher load rated tires than what is required. Link to comment Share on other sites More sharing options...
Baller skierjp Posted May 24, 2019 Baller Share Posted May 24, 2019 FYI the placard would not be allowed to be on the trailer if it did not adhere to DOT guidelines. So it’s not like they are just guessing on the tire pressure. Has anyone ever ridden in the boat as it is going down the road? Unbelievably harsh! Now jack up the tire pressure and it gets even worse. Link to comment Share on other sites More sharing options...
Baller ScottScott Posted May 24, 2019 Baller Share Posted May 24, 2019 The placard on my trailer states trailer weight capacity with this particular tire, at this inflation (which matches the max inflation of the tire at 80psi.) Mine is a 2017 mastercraft trailer for my 2017 prostar. Again, not like the recommended tire pressure rating on a car. Link to comment Share on other sites More sharing options...
Baller Wayne Posted May 24, 2019 Baller Share Posted May 24, 2019 @skierjp DOT does nothing for trailers that are not for hire(personal use) with regards to tire load ratings. Link to comment Share on other sites More sharing options...
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