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Quote: Originally posted by Surfer01 on 22/2/2010

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Your post reads as if you are getting mixed up with the tyre loading and the actual rim. There are plenty of tyres out there with the correct loading for a caravan as they are made for commercial vehicles and not specifically for caravans.

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not really,as a qualified motor engineer who ran a garage many moons ago and worked for a large company of motor part manufactures for 35 years.try it yourself,find a tyre with the correct loading and size for this tyre.never said there were tyres made just for caravans only,my last van had van tyres fitted.the 70 wall height must be same as i have a motor mover fitted and do not want to move it.

195/70/14/96N at a cost of about £60 to £80.

Quote: Originally posted by contivanman on 22/2/2010

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 Yes mate somthing along these lines but i was thinking of changing my van the 1 i was looking at had steel wheels just thought matching the car wheels would look better obviously the tyres and wheel would have to be of the correct rating i was just wondering if a caravan alloy was of a special design compared to normal car wheels?

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The wheel would need to fit the caravan, not just the pcd but also the offset & the hub centre would need to fit the wheel, this is important as modern wheels are 'hub centric' & all the weight is carried on the hub. After market alloys come with alignment rings to allow you to do this, also aftermkt alloys have usually have load ratings & those designed for the weight of a car on 4 may not be sufficent for the weight of a large caravan on 2.

If you want to use alloys supplied as oe on your car so you have a matching outfit this might be more difficult. You say pcd is ok but so would offset & hub centre size have to be ok as well. The wheel centre could be machined out to fit if too small but would be unsafe if hubcentre was larger as all the weight would be on the studs & could cause a broken stud.

Aftermkt alloys are designed to fit various applications & therefore have adjustable centres & load rating info is available. The alloys on your car as supplied new are specific to that car. Load rating info may not be available & fitting to caravan could only be done by trial & error. The ride height of the caravan would also need to be maintained or it might tow nose up/down & size of tyres required to achieve this may not be available in the load rating required for caravan.

 just out of interest do caravans supplied with alloys as standard come with an alloy or steel spare

         phil

Quote: Originally posted by phil76 on 22/2/2010

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 just out of interest do caravans supplied with alloys as standard come with an alloy or steel spare

         phil

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Quote: Originally posted by Tentz on 22/2/2010

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The wheel would need to fit the caravan, not just the pcd but also the offset & the hub centre would need to fit the wheel, this is important as modern wheels are 'hub centric' & all the weight is carried on the hub. After market alloys come with alignment rings to allow you to do this, also aftermkt alloys have usually have load ratings & those designed for the weight of a car on 4 may not be sufficent for the weight of a large caravan on 2.

If you want to use alloys supplied as oe on your car so you have a matching outfit this might be more difficult. You say pcd is ok but so would offset & hub centre size have to be ok as well. The wheel centre could be machined out to fit if too small but would be unsafe if hubcentre was larger as all the weight would be on the studs & could cause a broken stud.

Aftermkt alloys are designed to fit various applications & therefore have adjustable centres & load rating info is available. The alloys on your car as supplied new are specific to that car. Load rating info may not be available & fitting to caravan could only be done by trial & error. The ride height of the caravan would also need to be maintained or it might tow nose up/down & size of tyres required to achieve this may not be available in the load rating required for caravan.

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Quote: Originally posted by Rune Caster on 22/2/2010

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I'm not sure you have this right for the simple reason the the full 2.5 tonnes of one of my 4x4s is taken on the studs - in fact there is no hub available for the wheel to sit on. I believe you will find that the tensile strength of the studs have been calculated to take the full weight of the vehicle they are on

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Quote: Originally posted by Surfer01 on 22/2/2010

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Quote: Originally posted by phil76 on 22/2/2010

 

 just out of interest do caravans supplied with alloys as standard come with an alloy or steel spare

         phil

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Steel but they supply you with set of nuts as you cannot use the same nuts to bolt on the steel wheel that you use on the alloy wheels.

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Quote: Originally posted by Vic Wildish on 23/2/2010

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Quote: Originally posted by Surfer01 on 22/2/2010

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Quote: Originally posted by phil76 on 22/2/2010

 

 just out of interest do caravans supplied with alloys as standard come with an alloy or steel spare

         phil

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Steel but they supply you with set of nuts as you cannot use the same nuts to bolt on the steel wheel that you use on the alloy wheels.

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That's news to me. Mine came with a steel spare but I didn't get a set of different wheel nuts.

Enlighten me.....do!

Vic

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regarding putting car wheels on a caravan, I think the bearing would give up the ghost before the studs go. its like putting wheel spacers on your car hub  to bring the wheel farther out from the wheel arch. putting more stress on the bearings. But am sure some caravan wheels are different.

wot tentz is try to explain, some wheels have the flange that the stud holes are, are dead centre of the wheel. some wheels are offset. to try and explian it better. look at the top of the wheel, is the flange centre? some arent This is the difference between hub centric & lug centric wheels

Quote: Originally posted by Bill Terry on 23/2/2010

Quote: Originally posted by Vic Wildish on 23/2/2010

Quote: Originally posted by Surfer01 on 22/2/2010

Quote: Originally posted by phil76 on 22/2/2010

 

 just out of interest do caravans supplied with alloys as standard come with an alloy or steel spare

         phil

Steel but they supply you with set of nuts as you cannot use the same nuts to bolt on the steel wheel that you use on the alloy wheels.

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That's news to me. Mine came with a steel spare but I didn't get a set of different wheel nuts.

Enlighten me.....do!

Vic

see here

http://www.al-ko.co.uk/edit/files/support/CaravanChassisBook.pdf

you will see on here

standard bolts are M12 = 88Nm or 65ft lbs

M10 = 49Nm or 36 ft lbs

M14 = 135Nm or 99 ft lbs

M16 = 210Nm or 155 ft lbs

also says standard bolts M12 are not sutable for alloys.