tire size for 16' johnboat trailer

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lugoismad
Posts: 418
Joined: 02 Feb 2015, 21:24

tire size for 16' johnboat trailer

Post by lugoismad » 02 Jun 2018, 15:20

I have K550 tires, 13" wheels, 5 lug. Very nice compared to my old trailer with much smaller tires.
1984 Sea Nymph 14R (1457) - SOLD
1978 Starcraft Super Sport 16'

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bcbouy
Posts: 1372
Joined: 03 Jan 2011, 12:29
Location: british columbia canada

tire size for 16' johnboat trailer

Post by bcbouy » 02 Jun 2018, 16:30

my old 12" tire rims said right on them do not exceed 55 mph.i swapped them out asap.70 mph plus on an 8" rim?crazy.if a bigger rim means deeper launching then just lower the bunks.
if all else fails....stop using all else

sportsman
Posts: 7
Joined: 29 Jun 2018, 07:09

tire size for 16' johnboat trailer

Post by sportsman » 18 Jul 2018, 14:34

Being a retired truck driver, I immediately replaced the 5.70x8 tires and wheels with 175x80x13 tires and wheels. While at it, because the newer wheels did not fit the old hubs, I built a new axle using 2500 lb spindles and 2 1/2 inch heavy wall square tubing, and Bearing Buddies. Yeah this is overkill, but I don't have to worry about burning up bearings now. When I took the bearings off the spindles, I found the old bearings had galled the spindles. Another reason to replace. Bought the spindle kits on line for less than $100 per pair. Cost less than $175.00 to build a complete new axle. My buddy welded the spindles with an inexpensive 110v wire feed welder. Also bought new fenders, but thats another story.

mr coastie
Posts: 1
Joined: 01 Apr 2019, 21:31

tire size for 16' johnboat trailer

Post by mr coastie » 03 Apr 2019, 14:43

Greetings to all fellow boaters,
I have read several comments in regard to the tire "size" and load range capabilities.
weight is a contributing factor for tire selection too.
Please take into consideration "clearances" that will have you sitting at the side of the road if not proper.
I refer to the clearance between the rim and the tire to the inside of the fender, plus the spring hangers and the springs as well.
Is the fender large enough to allow the additional height of "bigger" tires?
is the offset of the wheel going to move the wheel edge and tire closer to object on the trailer that will hit them?
The clearances you have when the trailer is "unloaded" will reduce when "loaded" in most cases!
The changing from a 4.80X12-5 lug to a 13 inch wheel and tire assembly on my smaller trailer has enlightened me to ALL these issues. without and axle change out I remain with the 4.80X12...but 6 ply now!

el_cheapo
Posts: 56
Joined: 11 Apr 2016, 15:24
Location: Western mo

tire size for 16' johnboat trailer

Post by el_cheapo » 03 Apr 2019, 14:52

I have a 14' semi v that was on those little 8 inch tires and I blew out about 3 a season. Roads are [Censored] in my area especially trying to get in the backwater/small lakes down gravel roads. There are pot holes more than 8 inches deep those little tires just couldn't take it especially not if you were trying to travel over 10 miles an hour.

Ended up buying a junky old fiberglass boat, throwing it on the brush pile and keeping the motor and trailer. Trailer has 13 inch rims not sure tire diameter but it's close to my truck tires, and has a 3500 pound axle. Overkill for my little boat but now I can travel with the motor down and not worry about hitting anything, glide over pot holes reasonably easily (still gotta go easy on some) and haven't had a blow out since.

Life is much easier. Also once i do end up changing these tires I should be able to without the 4 way hitting the ground every rotation.

Justaguy442
Posts: 33
Joined: 08 Feb 2019, 16:43

tire size for 16' johnboat trailer

Post by Justaguy442 » 03 Apr 2019, 16:45

I had 12's x 4 bolt on my 14' tin and i upgraded to 13 x 5 bolt. Alot bigger and wider which i believe will work better on gravel roads.


I dont buy the car tire excuse on light boats. If they are both radial tires then the side walls are thin on both, unlike a bias. On heavier boats id say go with trailer tires for sure. But on a 1000 lbs boat i doubt youd notice a difference.

Justaguy442
Posts: 33
Joined: 08 Feb 2019, 16:43

tire size for 16' johnboat trailer

Post by Justaguy442 » 04 Apr 2019, 13:29

So i was doing some research into the car tire vs Trailer Tire and they talked about trailer sway. My nephew has a 14' tin on a trailer with car tires and my brother mentioned it sways but they figure its because the tongue is longer then usual. So after reading this i will change my opinion and say that just use trailer tires. A swaying boat is not fun at 60 mph.

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