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29 Jan 2011
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8.25 xzl on 7.50 rims
Hi all
any body know if you can put 16x8.25 on on a 16 x .7.50 split rim with no neg affects, as I am looking for a larger margin in relation to weight as I think the 7.50 are struggling a little on my 4.2 ton iveco 40.10w.
thanks mark
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30 Jan 2011
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I ran 8.25 XZLs on 16" x 5.5" rims for a couple of years without any trouble, though just a standard rim, not split. I should think you would be fine.
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30 Jan 2011
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If the width on your rim bead to bead is 7.5" then you will have no probs .
Ideally you need 6" width rim , but as prevoiusly posted 5.5" will fit , but you can sometimes get adverse results round the rim bead (splitting) more so at heavy weights . You say 8.25 tyre , is it a crossply ? you would be far better off with a radial . A 750r16 10pr or even 750r16 12pr would cope with a 4,2tonne iveco easily .
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31 Jan 2011
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8.25's are quite often radial, the michelins are radial
Have you got a supply of xzl 8.25 - i havn't been able to find any so am using dunlop sp111 and avon/semperit (all radial) - more like a xzy pattern
They fit fine on a 5.5 iveco rim and have a good weight loading of 128/124 (single / dualled)
I think your problem might be the overhang on your truck - are your flats on the rear of your truck ?
@silver g - you were running on solid 5.5's on a 4x4 iveco ? - i havn't found any yet that fit over the large rear drums on the 4x4
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31 Jan 2011
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Quote:
Originally Posted by rclafton
@silver g - you were running on solid 5.5's on a 4x4 iveco ? - i havn't found any yet that fit over the large rear drums on the 4x4
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No, sorry Richard, should have clarified - on a mercedes G wagen - and they were a b*****r to get on the rims. I didn't get on with them to be honest - they were very twitchy and needed airing down the minuite the terrain got iffy.
Almost impossible to find now as all the new production is taken my the forces, particularly Stayer.
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31 Jan 2011
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Ah... yes I've seen them talked about on g wagon forums (i hanker after one for more basic trips)
I'd pretty much thought that was happening, didn't think a tyre could be harder to find than the 255/100/16 xzl :confused1:
Would have thought the G was a little light for such a stiff tyre, maybe thats why yo had issues, our 4.5 tonne Ivecos are probabily better suited to them, I would like a set as a winter tyre option for the Iveco
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Quote:
Originally Posted by rclafton
Would have thought the G was a little light for such a stiff tyre, maybe thats why yo had issues, our 4.5 tonne Ivecos are probabily better suited to them, I would like a set as a winter tyre option for the Iveco
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Fully loaded i could be above 3 tonnes but, as I say just a bit skittish but I came to them from Goodyear wrangler mt/r .
Stayer have been making G wagens for the Canadian Army in Afganistan for about 5 years now and took the full production of 8.25s from Michelin
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1 Feb 2011
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Quote:
Originally Posted by marky116
Hi all
any body know if you can put 16x8.25 on on a 16 x .7.50 split rim with no neg affects, as I am looking for a larger margin in relation to weight as I think the 7.50 are struggling a little on my 4.2 ton iveco 40.10w.
thanks mark
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I presume you have 5.5 to 6" wide rims, not 7.5" wide rims.
5.5 to 6 is the proper width for 7.50R16s and will work fine for 8.25s.
You might be interested to know that 7.50R16 Michelin XZYs in load range G (14 ply rated) carry 50kg/tire more load than the 8.25R16 XZLs.
Charlie
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19 Feb 2011
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Hi
thanks for all the posts, have had punctures on both front and back, overhang is far from perfect situation but its not stopped us from getting this far and hopefully wont stop us from getting through China, Mongolia and Russia(gulp). The problem is a combination of speed and weight, the xzls, have low max speed rating and when you go to fast the tube moves inside the tyre and pop. Had no problems in cooler climates and none in hotter one as long as we keep the speeds down. But would like to increase the margin in regards weight, however gonna keep with the xzl,s for mongolia as speeds will be very low and they don't mind big rocks etc unless any one has a different view. Think I will def go with a more road based tire in uk due to more tarmac hours.
thanks Mark
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19 Feb 2011
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The 825r 16 will give you a better ride as the run at 65psi for max load wheras with 750r16 12pr you need to go to 100psi to run max load which is a 100kg more per tyre (approx) . What speed are you going ? The biggest killer of tyres is heat build up, usually caused by underinflation for the weight being carried, try weiging each axle seperately this will give you your gross weight but will also tell you what load you are subjecting your tyres to. If you do not have the load distributed very equally then you could weigh each wheel , but I dont think this is really needed with your vehicle . The load per tyre for 8.25r16 is 1450Kg , so you would have to be running with a seriously overloaded rear axle to approach this.
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21 Feb 2011
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8.25 on 5.5" split rim is possible but a tad narrow, 6" is considered minimum.
I did mine result in pictures. I run with 70psi at 4.2t fully loaded.
As mentioned in posts above the 8.25 R16 give a better ride.
ivanll
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21 Feb 2011
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@marky - I run with a road biased tyre (partly cos they were cheap and I picked up 2 more , never been usedfor 51 quid incl postage on ebay)
But I do like those yokohamas - must investigate more as they look more lie an all terrain tread
@Ivanall - i've pumped mine up to 90psi (the via air compressor worked great - thanks matt). But tell me about the rims , the photo says replace with 6" rim on same hub ? what do you mean exactly ? They look like the standard iveco rim. I'm suprise you had to cut away - my 8.25's fit fine as do someone elses on the iveco 4x4 list (and hes running xzl's 8.25)
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22 Feb 2011
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Rich,
Not all 8.25 have the same OD I had to remove app. 10mm edge as the tyre could scrape under certain circumstances, a minor mod to prevent the tyre being cut by the joint in the mudguard.
The outer 5.5" rim was removed from the original centre hub and replaced with a 6" wide rim, hard to see but it's done and for legal reason in Aust. also make it easier to remove and refit the tyre when needed.
I was after a 6.5" wide rim but it's not available, so 6" it is.
ivanll
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22 Feb 2011
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The 3 piece military rim is a 6.5" wide, i'm sure theres piles of them in an italian surplus depot somewhere but havn't found where yet
So I guess you used a Toyota split rim or similar and transfered the centre of the iveco rim. I've looked at this possibility for solid rims but never thought of using splits for it. I'd probabily take the centre out of a solid Iveco rim though to keep my 4x4 ones intact
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We have a few places specializing and certified in wheel modifications thats where I had mine done they also have different rim sizes and configuration in stock.
The hub in the 315/75 is originally from a split rim like the one with the 7.50 tyre it has been machined to a smaller diameter required for a tubeless rim, it can no longer fit in a 16" split rim, so taking the hub from a solid tubeless rim will not do, I to looked at that possibility.
I also searched for 6.5" rims at wreckers in Italy and Europe some 8 years ago, found nothing and so modified what was on hand, result is perfect and the 7.50 tyres fit neatly on 6" rims also.
ivanll
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