Jump to content
SAU Community

Tyre Regulations On The Strip

abcent

By abcent,
in Motorsport Discussion & Builds

 Share

Recommended Posts

abcent Mentor

abcent

Posted
Posted

Theres an drag event coming up for SAUvic soon and I was wondering.....if i get some wide 15 inch drag slicks for the rear of my 33-t can i leave the street steel radial 17's on the front?

I heard ages ago that if you have slicks, they have to be on all 4 corners...any truth to this?

Can I bang the slicks on the back only and enjoy having traction for once?

Or am I destine to take on the 1/4 on my regular street tyres?

cheers

I've emailed heathcote park, but still no reply as yet... :(

Link to comment
https://www.sau.com.au/forums/topic/113743-tyre-regulations-on-the-strip/
Share on other sites
MrBlonde Community Regular

MrBlonde

Posted
Posted

Heathcote is not an ANDRA sanctioned track so you are probably ungoverned on tmixing radials and cross plys. But I've never raced at Heathcote .. anyone who has care to comment?

The ANDRA ruling is that you can mix radials on the front and crossply on the rear until you run quicker than 12.50.

But you really don't want to run radials and crossplies. Try it and you'll find out why in the top end.

MS-75 Enthusiast

MS-75

Posted
Posted
Heathcote is not an ANDRA sanctioned track so you are probably ungoverned on tmixing radials and cross plys. But I've never raced at Heathcote .. anyone who has care to comment?

The ANDRA ruling is that you can mix radials on the front and crossply on the rear until you run quicker than 12.50.

But you really don't want to run radials and crossplies. Try it and you'll find out why in the top end.

Last time raced I had my Hoosier X-ply front runners on with the BF Goodrich Drag radials on the rear. It was amusing to watch the ANDR officials comb their regs to find a reason why I couldn't run like that. In short though-they couldn't find one. :) (because there is no rule on that one-and because it's fine as a combo)

As for the radial front/X-ply rear combo-Mr Blond is ,of course, completely correct.

The basic reason is that the radials don't much allow sideways movement of the car on the tyre, whereas X-plys do. What can happen is that the back of the car starts to move around on the tyre-bouncing from side to side, with the front staying put. This can get you into a positive-feedback condition where the bounce from side to side becomes more and more violent, eventually causing the car to sidestep and slide, or roll. Bad bad shit.

Think speedwobbles on a skateboard-but at 100mph plus in a car............. :(

Sean=-)

Al Grand Master

Al

Posted
Posted

Just some further question, from a novice :(

Barely street legal tyres, such as Mickey Thompsons (sp?) and Nitto's, are still rigid enough to run daily standard/road front tyres, as these are still classified as a street legal tyre?

It is only when you go to a full drag tyre that you need to comply with the regs?

MS-75 Enthusiast

MS-75

Posted
Posted

The only thing that governs the combination of front and rear tyres is the construction type.

Drag slicks, front runners and older (very old..) road tyres are of X-ply, or Bias ply construction. (have a siff about on the web for an in depth explanation and diagrams)

All other tyres are of Radial construction.

Nitto drag tyres, MickeyThompson radials(not the slicks), BFGoodrich Drag Radials and Hoosier Radials are all marginal for street use, but are still radials, and as such you do not need special front tyres to go with them (your normal street rubber is fine).

Hope this helps

Sean

abcent Mentor

abcent

Posted
  • Author
Posted

so in a nut shell......I'd be best to look for a set of drag RADIALS for the rear for a little extra grip and to maintain balance of the car.

thanks for all the advise guys, much appretiated!! :)

anyone know where I can find CHEAP 17" drag radials in Victoria?

Z1LLA Proficient

Z1LLA

Posted
Posted
Theres an drag event coming up for SAUvic soon and I was wondering.....if i get some wide 15 inch drag slicks for the rear of my 33-t can i leave the street steel radial 17's on the front?

I heard ages ago that if you have slicks, they have to be on all 4 corners...any truth to this?

Can I bang the slicks on the back only and enjoy having traction for once?

Or am I destine to take on the 1/4 on my regular street tyres?

cheers

I've emailed heathcote park, but still no reply as yet... :(

Hey mate I have raced at Heathcote heaps of times in my cars. You can run drag slicks on the rear and street tyres on the front with no problems up there.

I've been doing this on my Datsun and its recently gone 11.6/119mph with slicks on the rear and street tyres on the front and it has been straight on the track with no problems at all, top end included. Depends how fast your car is going to go I guess.

Heathcote Park owners have been on holidays the past week.

Put the slicks on and enjoy the G-Forces :(

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • TurboTapin
      Why am I hitting a power wall with my stroked RB25?

      By TurboTapin · Posted

      I couldn't agree more. I should have started from the get-go with a NEO or solid bucket conversion. I started looking into converting over to solid lifters yesterday. Now for some reason I was always under the impression that when using the Tomei solid lifter conversion, you would also require new valves (Longer or shorter stems, I can't remember which).  But I see no mention of this on any of the Tomei documentation. It just states I need the Tomei solid buckets, solid lifter cams and upgraded springs. As my head is already built, all I would need is another set of 1000$ Kelford cams, 500$ buckets and about 4H hours of my time installing and I'm off to the races!?!? There's no way it's that simple, I must me missing something? 
    • foney
      Cheap Gtr For Sale

      By foney · Posted

      BRUH, one of the biggest mistakes of my life..... and i've had plenty ;[)
    • Kapr
      "Cheap" bolt on turbo on RB25DET NEO

      By Kapr · Posted

      @Murray_Calavera iam just considering options 🙂 of course it is very expensive so that why i ask here 🙂  @joshuaho96 I looked at that GCG hybrid(i remember looking at it few weeks before) So this is "that" hybrid where i send them my turbo and they upgrade the inside to Garrett stuff and then they send it back. It cost around 1200-1300 USD which is FAR cheaper than the HKS and it is what iam looking for(i just do not have experience like this...to send something off to "upgrade" ) @tylink720 that is like 150 USD turbo no? 😄 I dont think i have the "ease on my mind" with this kind of turbo. I just put over 7000k USD to "LINK" up my engine...dont want to blow it up with cheap turbo 😄     EDIT: https://www.cj-motor.com/gcg-turbo-charger-for-nissan-rb20det-rb25det-high?srsltid=AfmBOooVeOZ6CZ6r1AIv5m-KPaa6BvudIPJTY8LW78khkd-gQlsaCht9 I looked at this and it seems ok? It is that CGC hybrid and it costs around 1250 USD (with back shipping). Do any of you have experience with this hybrid on NEO turbo? I quickly look thru the forum/web and it seems very good.
    • Rezz
      First time Skyline owner

      By Rezz · Posted

      Echo the awesome sentiment 👍 Definitely a car worth saving. Looking forward to seeing updates as well. 
    • Matt Z
      SAU NSW - Chickos Cruise

      By Matt Z · Posted

      Scenic roads, stunning skylines, and Chickos to finish it off! Join SAU NSW as we cruise through the Royal National Park and along Lawrence Hargrave Drive to Figtree! Sunday 26th October 2025 4:30PM Meeting Waterfall Station Parking 5:00PM Cruise Departure Royal National Park > Lawrence Hargrave Dr > Memorial Dr > Sid Parrish Park 6:15PM Arrival at Sid Parrish Park Figtree Meet Location: Waterfall Station Parking Final Destination: Sid Parrish Park RSVP: https://forms.gle/E4s5SiRKQfDdypky8 *Disclaimer* There will be a lead and follow car so no one should get lost. If you would like to attend or bring others along please put your name down and a +1 as numbers will be needed prior! This is NOT a race and we will all be adhering to all road rules. If this is what you want please come to one of our many track days. This is an official SAU:NSW event and will be run under a CAMS permit. One of the things that really sets our club apart is our commitment to being true enthusiasts. When on normal roads we strive to maintain good relations with the authorities as well as the public in general. When attending one of Skylines Australia NSW events please try to: • Be aware of surrounding environment and act accordingly. • Drive courteously on the state’s roads as a true enthusiast should. • Understand how important it is to maintain the good name of SAU NSW and thus, treat others accordingly. • Any misbehavior will not be tolerated and you will be asked to leave.
×
×
  • Create New...