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Thread: Tyre size query.
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23rd February 2014, 12:31 PM #1New Member
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Tyre size query.
Hi,
I am in the process of buying a 7x4 box trailer H/D,the tyres on it are 175/75x14 secondhand.
I have the chance to buy two 185R x14C light truck tyres 8ply.
I have done some measuring to see how the LT would fit and they will fit,how ever the distance from the top of the tyre to the guard is reduced a far bit in comparison to the 175's.
My worry is that with a good load on the tyres will hit the guards,I thought about putting some lifting blocks in to give me more height,but I do not want to void the warranty on the new trailer.
Any thoughts please.
Thank you.
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23rd February 2014, 09:30 PM #2Senior Member
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- Mar 2013
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- Qld Australia
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Hi, the other issue is that the Trailer ID nameplate has the size of tyres that were on it when it was first registered, so don't know what the legality is of changing tyres sizes. Having said that, is the axle in between the springs and the body, 'cause if it is then you could move the axle under the springs and gain some height that way.
Cheers
Ed.
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24th February 2014, 12:05 AM #3
Looking at roughly 20mm difference between those two sizes from axle to outer edge of tyre, so really comes down to what springs you have in it, I'd be inclined to say that you'd be fine, takes a fair heck of a load to compress trailer springs.
I've fitted LT tyres to my tandem that are at least 50mm bigger than original and specified, never touched the guards even when overloaded and I've loaded mine up and trawled some rough terrain.Cheers
DJ
ADMIN
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26th February 2014, 10:36 AM #4
The first thing you need to do is get out your tape measure.
look at the trailer as it stands on a flat surface with the hitch at the right height..either in the jockey wheel, a jack stand or hitced up.
measure from the top of the springs to the bottom of the chasis.....or between whetever is going to hit first..then measure between the top of the tyre and the bottom of the guard.
take one off the other and you will knwo how much you have to spare.
As far as what is on the vin plate or tyre plackard...there should be no issue going up a tyre size.
The problem is that most trailers are fitted with second hand wheel and tyres off pasenger cars....the profile in generally lower than light truck tyres.
I'd always go light truck tyres given the choice.
cheersAny thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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