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20” rims Tyre profile

Discussion in 'VF Holden Commodore (2013 - 2017)' started by Jackv8, Jun 11, 2019.

  1. Jackv8

    Jackv8 Member

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    Hi all, I’ve bought a set of HF-20 Wheels that came with 245-35-20 tyres and put on the car replacing the stock 18” vf ss s2 wheels and it’s a lot ruffer ride also you can hear the bump stops now :/
    What is the biggest profile I can put on these rims and car & would it improve ride quality?

    Note: the car is stock
     
  2. abuch47

    abuch47 Active Member

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    Yes it would but it will throw your speedo out. I made exactly the same change a month ago, thats low profiles for ya.
     
    Last edited: Jun 11, 2019
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  3. Forg

    Forg Well-Known Member

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    If you're a young bloke & the tyres look any bigger than standard, you'll be cop-bait, too. 'Taint legal (without engineering) to fit rolling-diameter wheels+tyres that're different by more than a few percent from standard.
     
  4. VS 5.0

    VS 5.0 Well-Known Member

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    Not sure how going to this tyre profile will equate to hearing the bump stops.

    I have the same size on my VE and there is no such noise.
     
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  5. abuch47

    abuch47 Active Member

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    What if your old but look young? Black wheels, maloo exhaust, maybe lowered and led headlights I wont last long

    Also one thing I found strange is went from stock 050s R18 to 245/35/R20 and noticed a decent increase in ride height like 30mm probably. literally went from scraping my bumper on most parking strips to not. didnt think the change in sidewall flex would be this much.
     
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  6. vc commodore

    vc commodore Well-Known Member

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    The 18 inch wheels you currently have fitted....Upping the rim size, decreases the sidewall profile, to keep the rolling radius correct (ie speedo) which in turn reduces the ride quality....

    So either put up with the reduced ride quality, or don't put the wheels on
     
  7. vc commodore

    vc commodore Well-Known Member

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    And these are a factory fitted optioned size, which means it is perfectly legal to fit them without any engineering certificate

    As for cop bail.....I've seen VE's with 18" wheels fitted, and the cops have been attracted to those cars....So can't really comment there
     
  8. VS 5.0

    VS 5.0 Well-Known Member

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    I think @Forg was speaking to OP's question about putting a tyre with a profile higher than 35 on the 20" rim.
     
  9. Forg

    Forg Well-Known Member

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    ^ Indeed, ‘twas a question in the first post.

    Wonder if the suspension needs repairs, though, if fitting a factory wheel/tyre size makes it hit the bump-stops - I presume on FE2 (mebbe it’s been modded?).
     
  10. [paradox]

    [paradox] Active Member

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    Ive got hf20s on a stock ssvr, and i dont find it rough in the slightest (spongey infact),
    but my previous car was a ve ssv on coilovers.. so i may be tainted.

    As Forg said sounds like their could be some other issue here. If the car is stock i cant see it being bump stops..
    but maybe strut top bushes, or the shocks themselves? How many KMs on the car?
    Id be getting the suspension looked at before blaming the wheels.
    Changing wheels shouldnt suddenly cause the suspension to crash into bump stops.
     
  11. Forg

    Forg Well-Known Member

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    Our VF1 SSVR on stock 19's is too firm for the interior's structural integrity … we've got more interior rattles at 4.5yrs & 25k kms than our prior totally-standard VS Berlina had at 15yrs & 150k kms.
     
  12. Mattricho

    Mattricho Active Member

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    I think holden’s Biggest problem is how quiet they made the car.

    Less outside sound means you can hear more inside sounds.

    There was a MASSIVE difference with cabin noise between my VZ svz and the VF SSv.
     
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  13. Anthony121

    Anthony121 Well-Known Member

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    Are you sure it isn't door rubbers making a noise. My VF2 also has the sunroof making a noise which my first VF didn't do. Drives me crazy.
     
  14. Voodoo_SV6

    Voodoo_SV6 Active Member

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    I have the factory 20" rims on my VF with same sized tyres as above, have 95,000km on the clock and no rattles and I run the tyres between 39 and 43psi. I don't find them harsh at all.
     
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  15. Forg

    Forg Well-Known Member

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    I can hear percussing vibrations in the rattle somewhere around/near/in the rear driver's side door, that's not a door rubber. And that cover over the instrument cluster (the one covered with the perforated leather) has a squeak too. I'm afraid to attempt a warranty claim at a dealer due to them being likely to make it worse (eg. investigation into the VS's erratic air-vent flutter showed how the original dealer had tried & failed to fix it by applying what looked like kilo's of silicone sealant!).

    But every time you hit a bump in the road, you can hear half the interior bits shaking against the other half ...
     
  16. [paradox]

    [paradox] Active Member

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    oh yeah my car definitely rattles, its a sept 17 build with 10,000kms on the clock, that holden shutdown imminent quality
     
  17. Jackv8

    Jackv8 Member

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    Alright fair enough, its a 2016 VF SS II FE2 suspension its got 93,000km i've only owned the car for 2 weeks now. Could be strut tops there is a gap on each. Do you think the 245/45/20 would scrub on the fronts has anyone seen those on a ve/vf?
    Thanks :)
     
    Last edited: Jun 14, 2019
  18. Forg

    Forg Well-Known Member

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    Even if they don’t (kinda doubt they would), I wouldn’t spend any money on them assuming the ride-quality will improve; I still reckon something else needs attention.
     
  19. panhead

    panhead Well-Known Member

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    Regardless of fit, a profile of 45 on a 20 inch diameter tyre would make the side wall too high and look awful in my opinion.

    If you don't like the ride swap out the rims for 19 or 18's and buy tyres of the correct diameter to suit and that should help improve your ride comfort over the current 20's.

    And I agree with Forg, I'd be off to a suspension shop and ask them to do a check for other possible problems before spending too much cash on new tyres.




    .
     
  20. Jackv8

    Jackv8 Member

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    Okay cheers fellas, i've noticed there's a 5mm gap from the body and top rubber strut mount, i recall the strut mounts would flog out around the 100k mark in ve's? Should the rubber sit flush on the body?
     

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