Have a '95 283 Convincor with single procharged 502, sitting on a '95 Vanguard tandem trailer. (This is the original trailer that came with the boat from the dealer). Am now using Carlisle 215/75R 14C tires. Tires fail regularly, (blowouts, grenaders!) usually at least 1-2 a season. Tire pressure checked before each use and max psi followed (50 PSI). These are the highest rated tires I have been able to find, and that my tire dealer recommended--each has a load capacity of 1870 lbs x 4 = 7480 total lbs. Trailer's weight category is 3700 lbs. I regularly see other 28's, including other boat manufacturers, on tandem trailers. Seasoned hauler -- have a 4 place enclosed snowmobile trailer and a 30' 3-horse living quarter trailer. Do not encounter tire problems on these units. Plus, highway speeds pulling do not exceed 60-62mph. Anyone have any thoughts........
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Trailer/tire capacity for 283 Convincor
- Thread starter steveh
- Start date
Chris E
Well-known member
Just had a quick look for your boat in the showroom section, couldn't find your year but found a 93. the boat weighs 5300lbs. Add 700 for a full tank of fuel and another 500 for gear and assorted stuff junk that always finds its way into the boat and you are looking at about 6500 lbs give or take. Add to that the trailer weight of say 1500lbs (just guessig) and you have about 8000lbs which exceeds your tires capacity and that is why you are blowing out all the time.
Now, if you are sitting on a trailer rated for 3700lbs you have a big problem and you are looking at a trailer failure, sooner than later. Sounds like your trailer is too small and you need to step up to a unit with at least a 7500lb weight rating. you will find the tires, bearings and brakes are substantially larger than what your current set up is.
By the way, i would stick with a trailer tire, only because the side walls are stiffer and when backing up tight, tandems tend to slide because they can't turn like a single axle does.
Now, if you are sitting on a trailer rated for 3700lbs you have a big problem and you are looking at a trailer failure, sooner than later. Sounds like your trailer is too small and you need to step up to a unit with at least a 7500lb weight rating. you will find the tires, bearings and brakes are substantially larger than what your current set up is.
By the way, i would stick with a trailer tire, only because the side walls are stiffer and when backing up tight, tandems tend to slide because they can't turn like a single axle does.
Thanks for the reply. Trailer is rated for 8000 lbs carrying capacity as stamped on trailer tongue -- the 3700lb figure is the rate category for the license plates. Sorry for the confusion. I have the '95 checkmate brochure and also found the estimated weight of this model to be 5300lbs. As I mentioned before, this is the original trailer that came with the boat new. If this was a bad match, why was it paired this way initially?????????????. The majority of single 28's we see are also on tandem trailers. Passenger/truck tires have never been on the trailer --we've always used ST's. However, Marathon and Nanking brands have failed in the past, we have just purchased 6 Carlisle (2 for spares).
Chris E
Well-known member
I've pulled 30 foot cruisers on tandems and never had a problem. But i think your trailer tires are definatley undersized for your application. i just checked out the shoreland'r site for a comparible trailer and here are the tires they are using:Tire Size ST225/75R15-D quite a bit different. if i were you i'd take the trailer to someone who knows what they are doing and spec out the right tire/wheel combination for your application. it will be cheaper then replaceing tires all the time.
As for why boats are sometimes sold with undersize trailers: cost - especially during boat show season. Keeps the package price down and competitive. Something i never agreed with and never did. if anything, i always sold boats with slightly oversize trailers because i knew the boat would be filled with stuff.
As for why boats are sometimes sold with undersize trailers: cost - especially during boat show season. Keeps the package price down and competitive. Something i never agreed with and never did. if anything, i always sold boats with slightly oversize trailers because i knew the boat would be filled with stuff.
steveh said:
looks like your tire capacity is close to the total weight of the rig. Boat 5,300 LB plus fuel. If it full thats 130 gallons and another 1000 lb the trailer if its steel will weigh at least 2000 lb. trailer and boat at the dry weight no gas is 7,300 lb. You said your tires were rated for 7,400 lb which is not enough for the weight of the rig. I have a 283 on a tandem aluminum trailer with 205 75 14 and I know the tires are not rated high enough for the load. I am planing on changing to a higher load rated tire.
Alos there has been numerous people complaining about blow outs with Carlisle tires. Check some of the other board for threads on Carlisle tires.
onthehammer
Active member
I would call Trailmaster, they are located in northern Indiana and have them switch your trailer to a triple axle if possible. I have a 2001 300 Convincor with a single 525 on a C-Hawk triple with 15 inch wheels and tires. Hauls great. Other friends of mine have 283's on tandems and hate the trailer just like you do. I also have other friends with triple axle with both 14 and 15 inch wheels and they all love their trailer, no problems with blowing tires all the time, or bearings for that matter. Just my opinion, I wouldn't have anything but a triple.