What Tyres for 15 “ Wheels

Discussion in 'Mech Tech' started by Popsy, Mar 7, 2019.

  1. Hi All, I’ve finally got myself a set of 15” Alloys thanks to Simon, Searching previous posts and doing some research I’ve found that if I don’t lower my bay (It’s Standard height) I should go for 195 70 15 to keep the speedo reading true , from my research a 185 R14 has a circumference of 80.4 inches and 195 70 15 has 80.8 inches (so close enough) , I also believe I can get commercial rated 195 70 15 which would be more suited to the weight , though I know you can get away with “Normal “ tyres with the correct speed rating .
    Does anybody have this size tyre on 15 inch wheels and do they look ok on a standard bus .
    Or have I completely got it wrong and need another size .

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  2. Baysearcher

    Baysearcher [secret moderator]

    It’s weight rating that’s important, not speed rating.
    Iain McAvoy, Poptop2 and Valveandy like this.
  3. Yes , thanks Doug I meant weight

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  4. Play it safe ! C rated commercial tyres

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    Popsy, Poptop2 and SeanOC like this.
  5. Baysearcher

    Baysearcher [secret moderator]

    They just need to be adequately rated, no need for commercial rating.
  6. Yes ,but to avoid all that flaff , it’s easier and cheaper to walk and ask for commercial tyres

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    Popsy likes this.
  7. Mine are 185/65 x 15 with a load rating of 94. I'm not too concerned about the speedo being totally accurate as it's in km/h anyway so I tend to use the sat nav.
    Popsy likes this.
  8. Ok thanks but have I got the size correct

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  9. Baysearcher

    Baysearcher [secret moderator]

    I've got 15s but I put mahoosive tyres on to gear it down a bit so I can't help!
    Popsy likes this.
  10. I have 195/70R15 102R van tyres inflated to 44 psi.
    Lovered by 5~6 cm, 1 inner spline i think.
    Cant comment on the ride as not done too many miles on them.
    Easy enough to get on and off.
    Very tight around the lip on the arch.
    77 Westy, Popsy and paul2590 like this.
  11. You have the correct size, 195/70x15 is as close to the original as you can get and tyres with the correct load rating are readily available – I’ve been running them for over 7 years.

    I’ll be renewing the tyres this year and changing to Pirelli Carrier All Season. https://www.roundtriptyres.co.uk/fi...-all-season-195-70-r15c-104-102r-97t-8pr.html
    Last edited: Mar 8, 2019
    Popsy likes this.
  12. This is what they look like fitted.
    100_0889 (Medium).JPG
    monkeyvanwestybike and rob.e like this.
  13. not All terrains to go with the LSD gearbox and monster engine?
  14. :) Nah, the monster engine is going to be a pussycat and the locker diff was fitted when I had the opportunity, not because I needed it. The bus seldom goes off-road; the pic was taken in the garden. I choose Pirelli Carrier All Season tyres because they have very good wet weather grip and they should be okay on ice - with the LSD.:thumbsup:
  15. Stick the two tyre sizes into ‘Will they fit’ and you get this



    The tyre you propose with a 15” wheel is pretty close to stock diameter / circumference

    Geordie and Popsy like this.
  16. But 185/70x15 is not the size proposed, 195/70x15 is closer to the standard 185x14.
  17. I would think a bit here.
    A 185 width tyre is quite close to the inside of the wheel arch . A 195 is nominally 5mm closer. That might make getting it off a bit harder if any lowering comes into the story.
    I think that the width of both of these tyres is a bit more than stock so the steering will be a bit heavier too.
    I really would not be too concerned with exactly matching diameters for the speedo as that is only 10% accurate anyway.

    Just run a GPS speedo app on a mobile phone and you will discover something like
    20 speedo = 14 gps
    33 speedo = 30 gps
    41 speedo = 40 gps
    53 speedo = 50 gps
    70 speedo = 67 gps
    73 speedo = 70 gps

    Thats with tyres that are 5% too small 185/65R15
    Popsy likes this.
  18. We're running Gusbus on 195/70 x 15's with a 102 load rating. Our tyre of choice is Falken Linam and they are a very good tyre, both in wet and dry conditions and in time, we will fit the same brand to Major. IMG_1303.JPG
    Popsy and paul2590 like this.
  19. Thanks Westy , nice to see what they look like

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  20. Thank you every one, seems it’s a similar debate to asking what oil to use ....

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