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Is this tyre size calculator reliable?

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  • Is this tyre size calculator reliable?



    Just in case it doesn't come up with the numbers i've entered, here they are:

    Before: 195 60 14 6 24
    After: 195 50 15 7 20

    My question is: Will the 'After' tyre and wheel combo really give me a smaller diameter in total, therefore making me sit even lower? Just seems unrealistic

  • #2
    it can depend on the model of tyre too.

    off the top of my head the second one is a smaller tyre
    Sarcasm is easily calculated on vortex dude. Take 4 parts GLI lip and divide by BBS RS. If you are left with a remainder, subtract it from omgmoarlow. Profit.

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    • #3
      Yes, you will be around 6mm lower.

      http://www.willtheyfit.com/index.php...&Submit=Submit

      Here's another one which is simpler to follow.

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      • #4
        Originally posted by dylan8 View Post
        it can depend on the model of tyre too.

        off the top of my head the second one is a smaller tyre
        Well the second tyre is bigger diameter wise, just the aspect ratio is lower, but not that much lower... so i didn't think it would make that much of a difference!

        Originally posted by jcflowers View Post
        Yes, you will be around 6mm lower.

        http://www.willtheyfit.com/index.php...&Submit=Submit

        Here's another one which is simpler to follow.
        Ahh that sucks! was hoping i'd have to wind my coils down if anything once i got bigger wheels. Now they'll probably have to go up

        thanks for the tip dude!

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        • #5
          I'm going from 175/70/14 on 14x5.5 or something to 195/55/15 on 15x7.5 rims. I would've liked to go a lower profile tyre or something but I'm the same reason.. You might have to go to 195/55 (same as me). that will raise your car almost 3mm from your old rims so you can wind coils down a tiny bit.

          Also, don't forget about speedo and if you change it too much, you'll need re-calibration. But if you run smaller wheels - less chance of tickets haha.

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          • #6
            Originally posted by jcflowers View Post
            I'm going from 175/70/14 on 14x5.5 or something to 195/55/15 on 15x7.5 rims. I would've liked to go a lower profile tyre or something but I'm the same reason.. You might have to go to 195/55 (same as me). that will raise your car almost 3mm from your old rims so you can wind coils down a tiny bit.

            Also, don't forget about speedo and if you change it too much, you'll need re-calibration. But if you run smaller wheels - less chance of tickets haha.
            Yeh I'm thinkin of going a 55, will fill out the wheel gap a little better, plus i don't mind a bit of rubber, doesn't look so bad on older cars.

            Only thing is I'm thinking a 55 will be a fair bit more expensive? they seem to be a lot less common than 50's or 40's.... or maybe I'm just looking in the wrong places

            EDIT: your avi looks insane BTW!

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            • #7
              Yeah, 195/55/15 are definitely available. If you don't care about brand or whatever, you can get them for $60 each on eBay. If you want a leading brand like yokohama, bridgestone, toyo, pirelli then you'll probably be paying a fair bit.

              Thanks for the kind words that's my ke70. It's got 175/60/14 Pirelli P6 on 14x7 or 14x7.5.. I can't remember. I got the tyres and wheels in a package so it was a very good deal for me haha.

              I was referring to my daily earlier - Work Equip 03s in 15x7 and 15x7.5 with 195/55

              What ride will yours be going on to?

              Ah also to consider: The lower profile tends to change the load rating unless you want to spend extra $$$. most 195/55 are arounf an 85 load rating, whereas 195/50 are often 82. These load ratings are a roadworthy item and the cops like to use them as a back-up for defects and to give out a major rather than a minor. A friend got dicked on the load rating rather than it being too low because the load rating is apparently a major safety concern or something. I dunno, I'll get whatever because if I'm going to be defected I'll have stock wheels and tyres anyway.
              Last edited by jcflowers; 07-30-2012, 07:28 AM.

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              • #8
                Originally posted by jcflowers View Post
                Yeah, 195/55/15 are definitely available. If you don't care about brand or whatever, you can get them for $60 each on eBay. If you want a leading brand like yokohama, bridgestone, toyo, pirelli then you'll probably be paying a fair bit.

                Thanks for the kind words that's my ke70. It's got 175/60/14 Pirelli P6 on 14x7 or 14x7.5.. I can't remember. I got the tyres and wheels in a package so it was a very good deal for me haha.

                I was referring to my daily earlier - Work Equip 03s in 15x7 and 15x7.5 with 195/55

                What ride will yours be going on to?

                Ah also to consider: The lower profile tends to change the load rating unless you want to spend extra $$$. most 195/55 are arounf an 85 load rating, whereas 195/50 are often 82. These load ratings are a roadworthy item and the cops like to use them as a back-up for defects and to give out a major rather than a minor. A friend got dicked on the load rating rather than it being too low because the load rating is apparently a major safety concern or something. I dunno, I'll get whatever because if I'm going to be defected I'll have stock wheels and tyres anyway.
                I'll definitely go cheapies for the moment.

                Maybe even ask a mate if i can jump in the tyres bin of his shop to see if i can find something decent!

                I thought it looked like it was tucking too much rubber for a daily haha

                Mines going on my E30 which is my daily (don't know where all you guys still on your p's can affor to have project cars + daily's!)

                couldn't find the load rating needed but just had a look at the load rating on the tyres on my bottle caps and they're 86... so i'd imagine it's gonna be a dog to find something right
                Last edited by joeseinfeld; 08-01-2012, 05:03 AM.

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