Alternative tyres for 22 1/2" wheels

Discussion in 'American RV's' started by Floozie2, Oct 13, 2008.

  1. Floozie2

    Floozie2 Read Only Funster

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    Anyone swapped over from the very expensive Michellin 235R8022.5 to the much cheaper 255R7022.5. If so how did it go and were there any problems? The weight and speed ratings are good, the dimensions not much different; the only issue I can think of is dual spacing, but that can be cured with spacers if need be.
    Look forward to getting some feedback
    Richard
     
  2. PeteH

    PeteH Funster

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    Rv Tyres

    Hi

    Do not know about 22.5" tyres But I did some research on 19.5" (2007) the problem is with spacing on the rear duals, the use of "spacers" in not advised, (at least by everyone I spoke too!!, even on USA forums) mainly as it complicates proper wheel alignment, so its a set of Rims too, if you can find them. If you go this route Post it up as I would (still) be interested in changing to 225R. (though not for another 5 years, as it cost me £1500 notes to change all mine!!.

    pete
     
  3. monaco

    monaco Read Only Funster

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    Hi
    your thoughts on changing tyre sizes

    general american rear wheel spacing is very generous and I don't think it would
    be a problem but don't use any spacers because the wheels will work loose if you do.

    regards monaco
     
  4. Geo

    Geo Trader - Funster

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    Re Tyre sizes,
    I have two Rvs(Not Boasting wish I hadn't) Both on Ford chassis and 19.5 tyres one has the 225 and the other 245 they do not have the same rims the 245 tyres are a deeper offset that compensate for the duel spacing,
    Spacers do not come recommended as the thickness reqd compromises the stud length,
    Have you considered any effects changing rolling radius of the tyre may have on cruise control and ecu/gearbox programing:Doh:
    Geo
     
  5. Floozie2

    Floozie2 Read Only Funster

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  6. Floozie2

    Floozie2 Read Only Funster

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    Thanks for all the posts guys, very helpful especially the spacer issue. Looking at the rear of mine, there's a chasm between the duals so I'm figuring I can lose half an inch. I won't know for sure until I'm off site and on the road again next week, when she's sitting with all her weight on the ground. I have clearance enough for the bodywork and the ratings all match, so maybe it's all looking good. The two reasons for doing this is availability (the 255s being easier to source abroad) and price. I can more or less get a full set of 255s for the price of a couple of the Michelins. As my tyres are beginning to age, it's something I'm looking at having to do in the not too distant future anyway hence the cost cutting excercise!!:Wink:

    Spoke to Sintons and they have a document that seems to say that the 255s are a good replacement for the 235s, so long as the clearances are OK.

    Cheers for now
    Richard
     
  7. monaco

    monaco Read Only Funster

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    22.5 tyre upgrade

    Hi, My first dynasty was fitted with 255x22.5 tyres and I found them hard to source it was mainly fleets like the British telecom that run them so I whent
    to 275x22.5 instead. but when we were on the continent i used to carry a spare
    tyre.working on the therory that you could get a tyre changed any where but you might have trouble getting a new one.
    I expect that your running 10 stud wheels and the american and continental stud patterns are different.

    regards
     
  8. Floozie2

    Floozie2 Read Only Funster

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    Latest news is this: I needed to make a decision as three of my tyres are so perished as to be borderline MOT failure. Gary, who works alongside M-Liner in Alloa came up with some 275/70R22.5s which are so close to the 235s as to be almost no difference, despite the supposed 40mm difference in width. He's tested these tyres on the duals and the fronts for spacing and everything is hunky-dory on that front. any how, they're going to be fitted so I'll let you know how they work. Also my bank balance will be over £1500 better off from original spec tyres and I can get replacements anywhere! So far a win-win situation:BigGrin:
     
  9. stanfreeman

    stanfreeman Read Only Funster

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    rv tyres

    Hi If anybody is interested i have one 235x22.5 mitchlin rv tyre for sale only coverd 3500 miles been stored in the dry no cracks on the walls £100.

    Stan
     
  10. monaco

    monaco Read Only Funster

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    upgradeing tyres

    Hi All

    My monaco Dynasty has been upgraded to 295/22.5 tyres no problems until
    it was parked up for a while and the air leeked out from the air bags on the suspention.
    the body then sat down on top of the rear tyres flexing the wheel arches. The solution to
    this was to put a larger bump stop between the rea sub frame and the body. no big deal
    but would do damage if left


    kind regards monaco
     

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