Bigger tyres on a GTI 180
  • Register
  • Help
Results 1 to 15 of 15
  1. #1
    Tadpole
    Join Date
    Apr 2001
    Location
    Sydney, NSW, Australia
    Posts
    25

    Default Bigger tyres on a GTI 180

    Hi Guys, I have inherited some nice tyres that are 215 40/17.... I know the GTI 180 takes 205s, will the 215s go on there ok?

    Advertisement


    Or is it a big no no?


    Thanks,
    Dekkar
    Remember, its not a game, its a state of mind......

  2. #2
    Fellow Frogger! kinroh's Avatar
    Join Date
    Feb 2012
    Location
    Sydney, Blacktown
    Posts
    180

    Default

    Quote Originally Posted by dekkar View Post
    Hi Guys, I have inherited some nice tyres that are 215 40/17.... I know the GTI 180 takes 205s, will the 215s go on there ok?

    Or is it a big no no?


    Thanks,
    Dekkar
    from 206gti.net

    "You can increase the tyre size so long as the ratio of the tyre also is adjusted. This ensures the wheel has essentially the same rolling radius. eg. 185/55/15 can be replaced by 195/50/15, whilst this will result in a 1.5% decrease in rolling diameter, this is considered insignificant. The 185/55/15 is an odd size tyre, ie it isn't in wide use by manufacturers. Another option is the 205/50/15. Rolling diameter is almost identical and the cost significantly lower.
    Similarly 205/45 ZR16 can be replaced with 215/35 ZR17*, again this will result in a 1.5% decrease in rolling diameter. Meaning when your speedo reads 100kph you are actually traveling 98.5kph. *Note rim size has actually been increased as well in this case."




    Specification Sidewall Radius Diameter Circumference Revs/Mile Difference 205/40?-17? 3.2in 11.7in 23.5in 73.7in 860 0.0% 215/40-17 3.4in 11.9in 23.8in 74.7in 848 1.3%

    from: http://www.miata.net/garage/tirecalc.html

    so whilst they may fit, you should consider the error.

  3. #3
    Tadpole
    Join Date
    Apr 2001
    Location
    Sydney, NSW, Australia
    Posts
    25

    Default

    Thanks for the reply.... I didnt realise that the first number on the tyres size had that affect on it...

    I was thinking it referred only to the width of the tyre.... But I'm not all that in the know.... so its good to get that kinda info...


    I'll do a bit of research and see if its worth putting them on when my current ones are worn out.
    Remember, its not a game, its a state of mind......

  4. #4
    sans witticism SLC206's Avatar
    Join Date
    Sep 2003
    Location
    North Parramatta
    Posts
    3,997

    Default

    There's not a lot of room at the back for wider tyres - but ultimately it will be whether the tyre will still fit on the 7" rim.
    Regards,

    Simon

    2018 308 GTi 2011 DS3 DSport
    ----
    2014 208 GTi 2007 207 GTi 2004 206 GTi180 2000 206 GTi 1995 306 XT

    www.peugeotclub.asn.au

  5. #5
    Tadpole
    Join Date
    May 2012
    Location
    Perth WA
    Posts
    26

    Default

    To put the diameter change into perspective, a half-worn 215/40R17 (say 4mm reduction in tread depth) will have the same overall diameter as a brand new 205/40R17.

    On paper it looks like the width would be an extra 5mm on each side of the tyre, but sometimes there's a bigger difference between two makes of tyre in the same nominal size. So consider the tyre shape if you're taking measurements on the car.

    I suspect the biggest problem would be that you are in NSW.
    Aren't you legally restricted to tyre sizes that are listed on the placard?
    Or has that changed / is it just rims / am I just wrong about it?

  6. #6
    Fellow Frogger!
    Join Date
    Oct 2010
    Location
    Melbourne
    Posts
    172

    Default

    Iirc the first number is the width and the second number is the profile in terms of the width divided by the depth of the sidewall. Someone might be able to confirm this.

    It will probably affect the handling. I had wider tyres on the 306 when I bought it and it was rubbish. It felt really floaty... I personally wouldn't change from standard size.

  7. #7
    Fellow Frogger!
    Join Date
    Oct 2010
    Location
    Melbourne
    Posts
    958

    Default

    215 width tyres are supposed to fit OK onto a 7 inch rim. I'm wondering this same question myself. Semi slicks aren't very numerous in the 205/40 17 size, but there are plenty in the 215/40 or 215/45 size.
    Does anyone actually know if they rub? Could I also put spacers on if it does rub, as it's a track issue I'm not worried about insurance issues for spacers.

  8. #8
    Fellow Frogger! Brett's Avatar
    Join Date
    Nov 2001
    Location
    Adelaide
    Posts
    617

    Default

    215/45R17 rub on rears going through turn one at Mallala with 5mm extra offset and inner guards removed.
    I have additional issues on front, but I'm running GAZ adjustables on the front and the adjustable nuts rub if I were to in my preferred ride height at any tyre size. Hopefully readjusting the spring heights will fix the fronts.
    Bathurst______2 57.22 Sandown_______1 35.29
    Mallala_______1 22.90 Phillip Island____1 56.41
    Winton_______1.43.90 Collingrove_______38.08
    The Bend_____2 21.96

    https://www.facebook.com/FrogstompRacing/

    http://www.harlandeng.com.au

  9. #9
    Fellow Frogger!
    Join Date
    Oct 2010
    Location
    Melbourne
    Posts
    958

    Default

    Quote Originally Posted by Brett View Post
    215/45R17 rub on rears going through turn one at Mallala with 5mm extra offset and inner guards removed.
    I have additional issues on front, but I'm running GAZ adjustables on the front and the adjustable nuts rub if I were to in my preferred ride height at any tyre size. Hopefully readjusting the spring heights will fix the fronts.
    Good to know, sounds like different tyres will have to wait until I decide it's a track only car.
    Would more offset, and widening the arches make the difference you think?

  10. #10
    Fellow Frogger! Brett's Avatar
    Join Date
    Nov 2001
    Location
    Adelaide
    Posts
    617

    Default

    Depends on what you want.
    I want to run rally spec ride heights which are lower.
    You could jack the rear slightly and the 215/45R17 fill the guards better from a looks point of view, but if you out to cane the car not ideal.
    I'll look at the tyres that have come off next week and let you know where they rubbed, but from memory rear guards need to be rolled and widened.

    Brettso
    Bathurst______2 57.22 Sandown_______1 35.29
    Mallala_______1 22.90 Phillip Island____1 56.41
    Winton_______1.43.90 Collingrove_______38.08
    The Bend_____2 21.96

    https://www.facebook.com/FrogstompRacing/

    http://www.harlandeng.com.au

  11. #11
    Member superpug's Avatar
    Join Date
    Sep 2014
    Location
    Brisbane
    Posts
    55

    Default

    Hi don't mean to resurrect an old thread but since this was made has anyone had success running 45 aspect ratio tyres on their 180 or switching to 16 inch 138 wheels? 40 aspect tyres are so expensive :/

  12. #12
    dvr
    dvr is offline
    Fellow Frogger!
    Join Date
    Nov 2010
    Location
    Sydney
    Posts
    705

    Default

    What's the standard size?

  13. #13
    Member superpug's Avatar
    Join Date
    Sep 2014
    Location
    Brisbane
    Posts
    55

    Default

    205/40r17

  14. #14
    dvr
    dvr is offline
    Fellow Frogger!
    Join Date
    Nov 2010
    Location
    Sydney
    Posts
    705

    Default

    This is a good site to compare tyre diameters.

    TYRESAVE: Tyre Size Calculator

    Not much difference between a 215 and 205 with the same profile.

  15. #15
    Member superpug's Avatar
    Join Date
    Sep 2014
    Location
    Brisbane
    Posts
    55

    Default

    Thanks Dvt I'll check it out. 205/40R17 are not what you'd call economical tyres

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •