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Tyres - 245/40/19

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  • #16
    Would it matter if the tyres had SUV printed on them?

    Does that make then unsuitable for a normal hatchback car

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    • #17
      Originally posted by Vx-Man-G View Post
      Would it matter if the tyres had SUV printed on them?

      Does that make then unsuitable for a normal hatchback car
      As long as they're 19's and roughly the same size as the standard tyres. SUV tyres usually have a bigger sidewall so just check this.

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      • #18
        OK, thank you. Even if the profile is the same, as in 45, they would still have a bigger side wall???

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        • #19
          I think the size RBH is suggesting is the 255x40x19 that he has, if you use the calculator you'll see it makes just a 1.2% difference on your speedo, thats within the manufacturer tolerance. If you fit a 45 profile it will make a bigger difference 3.5% which could put your speedo reading under what you are actually doing.
          An SUV rated trye is likely to have stiffer sidewalls and sometimes a chunkier tread to allow for mild offroad use so you wont neccessarily improve the ride.
          going to a 255x40 instead of 245x40 will give 10 mm more width and 4mm more sidewall which doesn't sound much but should improve the ride and give better rim protection.
          I did it on mine (although 255x35x20) and the extra 3.5 mm in sidewall and slightly more volume makes the ride very good.

          Hope that helps.
          Last edited by Drew; 22-09-2020, 08:58 AM. Reason: I've edited that because I got the profile wrong in the first line, it should have read 40 Not 45.

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          • #20
            Originally posted by Drew View Post
            I think the size RBH is suggesting is the 255x45x19 that he has, if you use the calculator you'll see it makes just a 1.2% difference on your speedo, thats within the manufacturer tolerance. If you fit a 45 profile it will make a bigger difference 3.5% which could put your speedo reading under what you are actually doing.
            An SUV rated trye is likely to have stiffer sidewalls and sometimes a chunkier tread to allow for mild offroad use so you wont neccessarily improve the ride.
            going to a 255x40 instead of 245x40 will give 10 mm more width and 4mm more sidewall which doesn't sound much but should improve the ride and give better rim protection.
            I did it on mine (although 255x35x20) and the extra 3.5 mm in sidewall and slightly more volume makes the ride very good.

            Hope that helps.
            Mines are 255/40x19
            i personally would go any more than this.

            Why would you wanna out SUV tyres on.....they'll be more expensive

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            • #21
              Originally posted by RBH View Post

              Mines are 255/40x19
              i personally would go any more than this.

              Why would you wanna out SUV tyres on.....they'll be more expensive
              Sorry tried to help there and posted the wrong size, I know you stuck with 40s and just went fatter like I did and I still put 45 doh.

              What RBH said ! They're the best alternative if you want to improve ride (and looks imo)

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              • #22
                Originally posted by RBH View Post

                Mines are 255/40x19
                i personally would go any more than this.

                Why would you wanna out SUV tyres on.....they'll be more expensive
                How would the fatter tyre improve ride as its still the same profile?

                Are we still saying 245/45/19 would be a suitable alternative for a better ride ?

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                • #23
                  The second figure is the sidewall height expressed as a percentage of the width. So if you increase width you increse sidewall height by that percentage as well. That second figure is not fixed your sidewall height is 40% of the width i.e. 40% of 245 is 98mm, thats the height of the sidewall. Increase to 255 width and 40% is 102mm so you gain 4mm extra sidewall. I know it doesn't sound a lot but you also increase the volume of the tyre as well and greater volume equals a smoother ride.

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                  • #24
                    If you keep the same width and change profile to 45% you would increse the sidewall height by around 12.25mm which could be too much.

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                    • #25
                      Just buy the feckin tyres

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                      • #26
                        Believe me MR rock -man .
                        im running 225-35-18"
                        and the ride dare I say is a bit "crashey "
                        now if I had been cleaver I could of and I wish I had gone for 45 profile
                        less crashey esp with our roads being full of holes .
                        yes it may look better with lower profile,but for transporting family around a higher profile is more family friendly.
                        if you are thinking of SUV tyres then my answer would be no !
                        as potentially you are fitting a tyre that is not designed for use on a car
                        but that's my therory.





                        12-34 low profile!


                        .K.M.P.C.U
                        YEEEEEEEEHAAAAAAAAA

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                        • #27
                          255/40 does seem like a sensible option.

                          Let me look into this and prices, etc.

                          Thanks.

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                          • #28
                            Originally posted by Vx-Man-G View Post
                            255/40 does seem like a sensible option.

                            Let me look into this and prices, etc.

                            Thanks.
                            Oh aye.

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