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Do 20 inch rims ride & handle much differently to 19's

Discussion in 'VF Holden Commodore (2013 - 2017)' started by VFSSVfan, Oct 6, 2019.

  1. VFSSVfan

    VFSSVfan Member

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    Hi And thanks in advance for your opinions.
    Are staggered 20's much different than staggered 19's in terms of ride ,steering response,general handling & road noise? I have a series 2 ssv with 25mm lower eibachs /bilsteins & need more grip to cope with 560rwhp.

    Thanks again.
     
  2. Trevor loves holden.

    Trevor loves holden. Active Member

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    Less tyre side wall harsher the ride.
     
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  3. Forg

    Forg Well-Known Member

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    There’s way more difference, in terms of performance, between models of tyre in the same size than between the same model in a 19” and a 20”.

    Unfortunately, the vast majority of people fit 20’s for appearance, so it’s going to be difficult to find a review from someone who’s done a proper comparison using before & after tyres of similar quality.

    What tyres are currently on it?
     
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  4. 426Cuda

    426Cuda SUBLIME!

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    Yes, they are different. I have one VF with 19's and one with 20's. 19's ride better. No doubt. Only the MRC counters that. They may also handle better, as the greater sidewall flex can help to soak up bumps on corners when the suspension is loaded up. In theory, the 20's should provide better traction. But, if I was building a VF track car I'd go 18's...
    I assume you have 19's? If so I wouldn't change just to help handle the grunt. My Motorsport has a lot less power than yours, ~275rwkw and it easily breaks traction on the 20's in first and second gear. Give it a bit of throttle and it will break traction on take off, floor it and it lights them up, feed it a bit on a corner and it will kick sideways. The 20's don't make much difference. I'd stick with what you have and maybe look at getting some grippier tyres.
     
  5. abuch47

    abuch47 Active Member

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    18 by 8s rode better and kept traction better than 20 by 9.5s. 30 aspect ratio just isnt enough.
     
  6. VS 5.0

    VS 5.0 Well-Known Member

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    I recall Top Gear Aus doing a comparison between 19s & 20s on a VE around their test track.

    19s were quicker.
     
  7. panhead

    panhead Well-Known Member

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    20's will handle just as well on the street as 19's and 18's.
    If you are pushing it to find out the difference, God bless you.
    Suspension setup and sticky rubber will have an even bigger impact.
    If you are going to the track wear a set of 18's, dedicated track rims and tyres are a must in my opinion anyway.
    Comfort over style will always be at the discretion of the owner.
    Sexy low sidewalls versus comfy high walls.




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  8. _R_J_K_

    _R_J_K_ Well-Known Member

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    Not all about diameter either. If you're trying to lay rubber down you need to look at getting wider wheels also. Either way, if you're tracking it I'd run with a smaller diameter wheel (like a really wide 18 or 19). You'll also need to consider the costs of tyres as a consumable if you plan to go through a couple of sets a year.

    Is this car for track or drag or do you not really do either?
     
  9. abuch47

    abuch47 Active Member

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    traction is about contact patch and stickyness. greater tyre width and aspect profile equals more rubber touching the surface when weight transfers to rear.
     
  10. Forg

    Forg Well-Known Member

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    Yes, I was going to say something about this, but I was too lazy to go looking for whether you can get tyres in the right sizes. For example if you're wearing 275mm 35-section at the rear, then by fitting a 19x10 back there you can probably push out to maybe 305 to 315 width but … do 30-section tyres give the correct rolling diameter? Can you get 25's?!
     
  11. panhead

    panhead Well-Known Member

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    Yokohama make a 315/25R19 in their Advan Sport V103 range.

    I run a 285/25R20 on one of my cars on a 20 x 10 rim and ran a 295/25R20 on my old Ute and wouldn't want to go any wider than a 295 on 10 inches.





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  12. Forg

    Forg Well-Known Member

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    ^ Yeah my quick calcs were way out, consider me overly metricised … in my head 300mm was the width of the rim, 10". :)

    Would you need panel mods to get 10.5"+ to fit under the rear?
     
  13. panhead

    panhead Well-Known Member

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    A 10.5 inch rim will fit under the rear of a VE/VF with the right offsets without panel work apart from guard rolling.

    You'd need to think about the tyre though and I wouldn't go any wider than a 285 on a rim with a +42 offset.

    Change the offset and you may get a wider tyre under it but you would need to do some careful measuring up before you go down that route and be prepared to slightly stretch the guard if you get it wrong which to do properly will also require paint.

    In fact I'd want to make an arrangement with the tyre shop to do a trial fit for the 285 and if there is a problem strip it off for a 275 which would mean you'd be better off going the 10 inch rim with the 285 which with the right offset is an easy fit.

    I think I made that a little bit confusing.




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  14. RED LION

    RED LION Active Member

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    On my old Calais V wagon I swapped out the factory 19’s for some genuine Rapiers with Potenza S001’s. Id say the Rapiers felt better on the road with minimal road noise. Put some decent tyres and quality rims on and you’ll be fine.
     

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