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  1. #1
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    Size 185 tires on 195 alloys.

    A car that has alloys with tires on them size 195 (195/50R15 to be exact).

    Would it be safe to put 185 tires on the wheels? (186/60R15 to be exact).


    I would have thought not. As 195 refers to the width of them, and so the width of the allow wheels are 195 in my logic, but perhaps not.


    What do you think? Google seems to say that's it's fine. Hmmmm.

  2. #2
    Lord of Swine
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    Tires are much wider than rims.
    Go look.

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    I believe that, but the part that connects to the rims on the 185's are not 10mm smaller than the 195's?

    Apparently not, from checking around on the net.

    Not exactly something you want to play with when you'll have your baby in the car at even 80kph.

  4. #4
    Excommunicated baldrick's Avatar
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    195/185 is the tyre tread width

    50/60 is the tyre height ( series )

    R15 is the rim size

    so 10 mm diff in the width is nothing - but 50 series tyres are pretty low profile

    and the profile difference can affect your speedo - you may need to change the gear at the end of the cable that connects to your gearbox - though modern cars may not use a cable anymore - been a while since I have fcuked with a gearbox
    If you torture data for enough time , you can get it to say what you want.

  5. #5
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    Quote Originally Posted by DBell View Post
    I believe that, but the part that connects to the rims on the 185's are not 10mm smaller than the 195's?

    By and large, rims of the same diameter are all the same width.
    Otherwise there would be an insane amount of tire/rim combinations to deal with.

  6. #6
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    Okay, great thanks.

    We have a GPS hooked up, so not really worried about speedo error. Just the safety aspect.

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  8. #8
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    Quote Originally Posted by Necron99 View Post
    Quote Originally Posted by DBell View Post
    I believe that, but the part that connects to the rims on the 185's are not 10mm smaller than the 195's?

    By and large, rims of the same diameter are all the same width.
    Otherwise there would be an insane amount of tire/rim combinations to deal with.
    what utter rubbish!!! you can buy any width that you desire! have a look in any good aftermarket wheel shop.

  9. #9
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    Quote Originally Posted by mykthemin View Post
    Quote Originally Posted by Necron99 View Post
    Quote Originally Posted by DBell View Post
    I believe that, but the part that connects to the rims on the 185's are not 10mm smaller than the 195's?

    By and large, rims of the same diameter are all the same width.
    Otherwise there would be an insane amount of tire/rim combinations to deal with.
    what utter rubbish!!! you can buy any width that you desire! have a look in any good aftermarket wheel shop.
    Necron clearly is not a car guy.

  10. #10
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    What is the width of the rim. It will be marked on the wheel near the nozzle where you pump the air in. I would think that only a 10 mm difference will be within limits. By the way, going narrower in the tread while increasing the profile marginally means that you will have very little difference in speedo readings.

  11. #11
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    Quote Originally Posted by palexxxx View Post
    What is the width of the rim. It will be marked on the wheel near the nozzle where you pump the air in.
    Thanks very much. I'll check when I get home.

    I presume it is in the same metric measurement, ie 195 or 185 or whatever.

    One interesting thing that I also learned was that every tire has the manufactured date molded into the side wall in a 4 digit code. 0912 for the 9th week of 2012, 4310 for the 43rd week of 2010 etc.

    Anyway, will check the alloy rim later to see if it has the width marked on it.

  12. #12
    better looking than Ned
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    What sort of men don't know about tires, very faggy

  13. #13
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    tyres

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    Quote Originally Posted by DBell View Post
    Quote Originally Posted by palexxxx View Post
    What is the width of the rim. It will be marked on the wheel near the nozzle where you pump the air in.
    Thanks very much. I'll check when I get home.

    I presume it is in the same metric measurement, ie 195 or 185 or whatever.
    No. it will be in inches and it will be on the back of the rim. it will be something like 15x6j.

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    6 inches will probably be too wide for a 185 or 195 tyre.

    For those tyres it'll probably be more like 4 1/2 or 5 inch.

    therefor 15 x 4.5 J or JJ
    or 15 x 5 J or JJ

  16. #16
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    Based on the tyre sizes you've given, the diameter will go from 57.60 cm with the 195 tyre to 60.30 with the 185 tyre. Very little difference in diameter, also I think the difference in width will not be worth worrying about either.

    According to the net, it'll make a difference of 4.5% to the accuracy of the speedo. Since speedo's are usually showing faster than actual speed, the change in tyre will probably make the speedo more accurate.

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    Thailand Expat Fondles's Avatar
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    Quote Originally Posted by palexxxx View Post
    6 inches will probably be too wide for a 185 or 195 tyre.

    For those tyres it'll probably be more like 4 1/2 or 5 inch.

    therefor 15 x 4.5 J or JJ
    or 15 x 5 J or JJ
    Wrong.

    Tyre Size for Rim Size/Width Calculator - What's the best tyre size for my rim?

  18. #18
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    ^ yeah, you're right, I was a bit too hasty in answering.

    I thought my last wheels were 17 x 7JJ but they were 17 x 8JJ.

  19. #19
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    Quote Originally Posted by DBell View Post
    A car that has alloys with tires on them size 195 (195/50R15 to be exact).

    Would it be safe to put 185 tires on the wheels? (186/60R15 to be exact).


    I would have thought not. As 195 refers to the width of them, and so the width of the allow wheels are 195 in my logic, but perhaps not.


    What do you think? Google seems to say that's it's fine. Hmmmm.
    Shouldn't be a problem. Your ride and handling will change a little, but as long as you aren't sporting about it won't make much difference. The 60 series will ride a little softer and not hold the turns as well as a 50 series tyre. I'm assuming you're changing sizes because the 185/60 is a cheaper price.

  20. #20
    Excommunicated baldrick's Avatar
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    Quote Originally Posted by Dillinger
    tyres
    they is all tuyeres

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    Quote Originally Posted by Mr Earl View Post
    Quote Originally Posted by DBell View Post
    A car that has alloys with tires on them size 195 (195/50R15 to be exact).

    Would it be safe to put 185 tires on the wheels? (186/60R15 to be exact).


    I would have thought not. As 195 refers to the width of them, and so the width of the allow wheels are 195 in my logic, but perhaps not.


    What do you think? Google seems to say that's it's fine. Hmmmm.
    Shouldn't be a problem. Your ride and handling will change a little, but as long as you aren't sporting about it won't make much difference. The 60 series will ride a little softer and not hold the turns as well as a 50 series tyre. I'm assuming you're changing sizes because the 185/60 is a cheaper price.

    Final gearing will also change a little bit and the speedo will read about 5% faster.

    The Meth One's Fuck The Best !!


  22. #22
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    ^I think the outside dimensions of the two tires is nearly the same.

  23. #23
    Excommunicated baldrick's Avatar
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    what do you do about the speedo in this modern day and age ?

    is it still just changing the cog on the gearbox end of the cable ?

  24. #24
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    I've just had 175's instead of the usual 185s put on our car. They are filled with Nitrogen instead of air.

    I notice that the car accelerates better and the handling is also improved.

    From what I could find on the web, fuel consumption should improve slightly around town as the engine has a slightly easier task moving the smaller tyres.

    However, on long trips at steady higher speeds the consumption is supposed to be slightly worse as less ground is covered by each rotation. Can't say I've noticed much of a difference either way.

  25. #25
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    Thanks for all the info.

    Just checked and the rims are 15x6.5jj

    With that great link above I can see that min tire width should be 185, recommended 195 and max 205.

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