wheel tire upgrade

[kickingbug1]

 next season i will be upgrading from 8" wheels and tires to 12 inchers. just curious about the load rating. given that the boat weighs 1100lbs plus gear and trailer, what rating would be enough?  i think b rated tires are good for 850 lbs and d a little over 1000lbs. is the weight distributed evenly to both wheels?

[JTMeissner]

kickingbug1, I'd guess the weight is pretty even on both tires, everything seems pretty symmetrical in the CP-16.  When I towed my 16 down for a move, truck scales showed me at 1700lbs for the boat, trailer, and assorted equipment.  Seems high to me, but that's what I have on the weight tickets. 

With 12 inch tires, you have to pick 4.80 or 5.30 width, each will have a different load rating per letter category, and a slightly different total diameter.  I think you can also get radials down at that size, so that changes options too.  It's an upgrade I planned on making, but have moved to other priorities as the 8 inch tires are doing the job getting the boat from the shed to the lake.  Likely to change when a full overhaul may be due pending another move and potential long trips for boating excursions.

-Justin

[carry-on]

Capt. Kick,
My 16 trailer has 10 inch wheels. The tires are 20.5x8.0-10, Load rating E. At 90 psi each tire is rated at 1535 pounds.
So, about 3000 pound load capacity. This may exceed the axle capacity, but I am very comfortable with the tires.
The boat is on a trailer at the marina, so the travel is not much. I did make one 900 mile trip and the little wheels were really spinning behind my Silverado with 18 inch wheels. I checked the tires and bearings quite often and all was well.
If you can find them, I think the 'E' rating is worth the cost. If you are launching in salt water and parking in the sun, a frequent coating of tire gel may extend the life.

[kickingbug1]

    thanks for the input fellas

[MacGyver]

Kickin,

Try Etrailer.com, look up that current tire size, then check out the options.

I would think about running like said above, it is a Kenda 20.5 tire, ten inch size.
They are rated at 1650 each now I think. load range E.

Put those on the 19 this year, no problems. NICE tires too.

Come mounted on a galvanized rim for like 110 and if you buy 2, (gets you over the 150 dollar free ship) they ship free out of ST Louis.

I am a cheapa$$ and that was the best deal I could find around here.
Had one of the 3 show up with a small slice, they shipped the new one out no problem, I got it, then shipped the old one back. No Charge.

Also offer it with a painted rim, a little cheaper.

Mac

[skip1930]

 "i think b rated tires are good for 850 lbs and d a little over 1000lbs. is the weight distributed evenly to both wheels?  "

The side wall rating is the key as alluded to. Loads of 850 lb or 1150 lb and up can be had for 8" 10" 12" 13" 14" rims. Yes the load is equal, generally speaking for both wheels. The load rating under those 60 foot mobile home trailers are phenomenal, which is what I have rolling under my 16 foot double axle flat bed trailer. Four wheels good for 16,000 lb. and pulled by the Expedition.

The alpha ratings, A, B, C, apply to -->Ware [how soft the rubber compound is and how fast the rubber goes away] ~ Traction [How grippy the tread is] ~ Temperature [when the tread chunks and leaves the carcuss]. I had Goodyear Eagles on my 12 cylinder good for 160 mph. Great traction, high temperature, short lived rubber. Big bucks.

Now 'D's and 'E's and 'F's are truck and trailer tire sizes and loads...completely different animals. Side wall heights have little to do with tread widths.

As to sizes, this example of a 265 Radial-75-16 is 265mm across the tread~75% of the tread width is the side wall height~rim size 16 inch. Load is 1275 lb at 40 psig For my Ford Expedition. Pay attention to side wall height as a percentage of tread width.

My small little 10 inch wheels are 20.5 x 8.0-10, Load rating E. At 90 psi each tire is rated at 1535 pounds. Almost good enough for my CP-19 + trailer + stuff at 3260 lb.

These tires have been doing the job since 1996. Of course these are a product of China. I Vaseline them both sides to prevent weather checking...works so far.

skip.

[kickingbug1]

   thanks again fellas----got my wheels today, 8 bucks a piece. the tires i will get in the spring.

[comfortably numb]

Skip

What tires do you have on your trailer for the 19... may have miss understood. Thanks

[skip1930]

I'll tell ya Pink...My small little 10 inch wheels are 20.5 x 8.0-10, Load rating E. At 90 psi each tire is rated at 1535 pounds. Almost good enough for my CP-19 + trailer + stuff at 3260 lb.

This will probably land me some more bad karma. So be it.

skip.