Tyres again

Submitted: Monday, Jul 02, 2012 at 16:34
ThreadID: 96639 Views:1522 Replies:3 FollowUps:3
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I have 31 X10.50R15LT on the camper and 265/65R17 on the 4WD.

The tyres on the camper are close to getting replaced, and wondering if I should replace tyres and rims to match with the same as the 4WD, the exterior diameter seems to be the same, but bigger rims less rubber.

What are the pros/con's of doing such change??

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Reply By: Ross M - Monday, Jul 02, 2012 at 17:49

Monday, Jul 02, 2012 at 17:49
It would seem to be a good idea, but, the cost is one thing to consider.
Secondly to buy 17 rims and tyres besides the enormous cost, it's a retrograde step as the camper will have less ability to provide a cushioned ride with those rims and tyres.
Although a sound idea for interchangeability with same same, the use of 15's are probably not able to go over the brakes of a modern 17" equipped 4wd anyway.

So keeping the costs down it is probably best to carry just spare tyres of both types/no rims if needed. Although a space issue the weight is not so bad and they can be carried on a roof rack or "A" frame with suitable fastenings.

If you can't fit them in case of emergency, if you need to use them someone else can most likely change them for you. They will be able to do this because you have the spares with you and they will be the correct brand, style and fitment. Something you probably won't be able to source easily "out the back".
They will also be a higher price out there so again a saving.
AnswerID: 489972

Follow Up By: PeterInSa - Monday, Jul 02, 2012 at 17:57

Monday, Jul 02, 2012 at 17:57
I incorrectly read the 31x10's were on the 4x4, as per my thread below
FollowupID: 765133

Follow Up By: Member - Tony Z (NSW) - Monday, Jul 02, 2012 at 19:31

Monday, Jul 02, 2012 at 19:31
Hi Ross, why would fitting 17' wheels & tyre's to the camper give a less cushioned ride that 15". Don't you lower tyre pressure to give some cushioning as well as spring rates. Don't know what vehicle he drives but when we had our Cub Drover built we supplied them 3 17"x 265x 65 LT construction wheels & tyres same as fitted to our Pajero, it did take a while to find wheels to fit the offset as I wanted steel wheels all-round for strength and ability to repair
FollowupID: 765142

Follow Up By: Ross M - Monday, Jul 02, 2012 at 20:09

Monday, Jul 02, 2012 at 20:09
G'day Tony Z
The distance between the rim and the road is the governing factor for cushioning ability.
A 65% aspect ratio is less air under the rim than the 31x10.5 so less cushioning ability. The 31x10.5 has around 10& more ability to absorb road shock and will elongate about the same when run at lower pressure for off road or sand.
FollowupID: 765149

Reply By: PeterInSa - Monday, Jul 02, 2012 at 17:53

Monday, Jul 02, 2012 at 17:53
Its a great idea to cut down the number off spares carried, or carry the same with a better comfort knowing you have the spares.

I would check with the manufacturer of your camper to see if you can do the switch. I do not know the weight of your camper but to me the 265 could carry a heavier load than the 31x10, which could be a limiting factor.

In addition the brake drums may not fit the 31x10.

Its wise to check, just in case its and out for your insurance company in case of any accident.

AnswerID: 489974

Reply By: Member - Phil G (SA) - Monday, Jul 02, 2012 at 18:14

Monday, Jul 02, 2012 at 18:14
Not sure you'll be able to get compatible 17" rims. The offset of your 4wd's 17" rims would be considerably different to offset required for your camper. You might want to measure the backspacing of each to find out.

But I think it would be a good move to share the same tyres on the camper. The 265/65R17 are a very common size, and they are now priced about the same as most 16" tyres. And the 31x10.5R15 are not a robust tyre.
Even if the rims weren't compatible, you'd still be able to take the tyres off the camper rims and put them on the 4wd.

AnswerID: 489975

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