Spare tire size and lug nut size

A forum for discussing issues relating to trailers and towing MacGregor sailboats.
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empet
Deckhand
Posts: 27
Joined: Fri Nov 30, 2007 7:42 pm
Location: Newburgh, NY, 05 26M Honda 50

Spare tire size and lug nut size

Post by empet »

Hi - I need your help: have to tow my 2005 26M long distance in 2 days. Unfortunately, the boat & trailer are in the shop and I can't get to it.
I want to take a spare for the trailer:

Does anyone know the rim and tire specs for the 2005 factory 26M trailer?

Does anyone know the lug nut size? I want to get a torque wrench.
The torque should be set at around 90, correct?

Thanks a lot.
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R Rae
First Officer
Posts: 259
Joined: Fri Apr 14, 2006 7:12 pm

Post by R Rae »

Just checked the '02 X trailer wheel

Tire size is ST215/75R14

Lug nut size is 1/2" x 20 tpi

Hope this helps.
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empet
Deckhand
Posts: 27
Joined: Fri Nov 30, 2007 7:42 pm
Location: Newburgh, NY, 05 26M Honda 50

Post by empet »

Thanks R Ray! I think the 25 26M has a 15 tire, I'll check.
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c130king
Admiral
Posts: 2730
Joined: Sun Nov 05, 2006 5:30 pm
Sailboat: MacGregor 26M
Location: Wiggins, MS --- '05 26M "König" w/ 40hp Merc
Contact:

Post by c130king »

Empet,

Try looking at this post:

Spare Tire & Lug Info

Good luck,
Jim
Last edited by c130king on Mon Jul 14, 2008 1:18 am, edited 1 time in total.
Phillip
First Officer
Posts: 330
Joined: Fri Nov 26, 2004 11:49 pm
Location: Sunshine Coast Australia 2000 26X Tohatsu 50hp

Re: Spare tire size and lug nut size

Post by Phillip »

I have just been thru an exercise with wheel and tyre size in Australia.

Check that the hole in the centre of these wheels is the correct size.

The trailer wheel may have a larger centre hole than the same wheel used on cars....that is what I found down here anyway.
Obviously the Mac wheel is a standard trailer wheel in your country.
It is not here.
Cheers
Phillip
Frank C

Re: Spare tire size and lug nut size

Post by Frank C »

Phillip, that's true here too.

Wheels can be made hub-centric or lug-centric. This refers to the method of centering the wheel on the hub, and also where the major load is carried.

Some automotive wheels have an identical lug configuration as our trailer wheels (i.e., 545 ... 5 lugs on a 4.5" bolt circle), such as light Fords and Jeep Cherokee. But they won't fit the trailer because they are hub-centric, whereby the center bore is a snug fit with their hubs, centering the wheel and carrying most of the weight. That center bore is too small for our trailer hubs, even though all other measurements are identical.

Trailer wheels are generally lug-centric. The lugnuts have tapers to center the wheel against the hub. In such system, the lugs carry most of the load. These wheels have an over-sized center bore that avoids interfering with lug-centering. The two styles of wheel are sometimes interchanged, but that's unsafe.

Trailer wheels are generally built to a heavier load capacity . . . 1,800 to 2,500# per wheel, which is perfect for a 3,500 to 5,000 axle rating. The average automobile is only 5,000# on two axles, or about half the load on our trailer axle.
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