Upgrading rear tyres and wheels

[Tenrocca]

I think the wheels on dons arntz are show wheels "streeter" maybe?

[750hp]

Tenrocca - Boss 338 Wheels American Eagle They're actually quite a nice wheel, especially considering how cheap and common they are in the States.

[400TT]

17" tyre diameters are a bit on the small side for a Cobra.

For our new Cobra kit we have spent a fair bit of time trying to work out a solution for better filling the guards with 17" tyres. Or at least the illusion of filling the guards.

The best solution we have found is as Mike pointed out, lower the car so that the tyres sit up in the guards further. So we have concentrated on getting underbody ground clearance to allow the body to sit lower over the tyres. We have employed some new techniques to enable this.

From my notes:

As Leigh suggested you can get about 10mm larger diameter on rear by going with the 285/40/17 GS-D3. That seems to be the tallest of the 285/40 tyres.

In 15" with 295/50/15 you are 15mm larger diameter than 285/40/17 GS-D3. And if you wanted to run 275/60/15 you are 48mm larger in diameter.

And basically the same problem on the front, all 15" tyres are available in larger diameters.


Boxhead, I'm with you, can't beat the Billboards for looks.

I think Craig(750HP) is onto something, by the time you get to 20" tyres, you get back into the larger diameters again. Problem solved.

[boxhead]

Looks great Baz, sure hope to see it at Winton ShelbyFest

[Merv and Sharon]

Yes Baz. I know that since I fitted the AP Racing calipers and larger discs I could not go to a smaller rim than 17". Your car is looking great now.

[750hp]

M&H 325/45-17 and Coys wheels pics! - Chevelle Tech

Don't be put off by the "325" width, as it's not really that wide. The pics show that it might be the combination of the correct width with the extra sidewall you're looking for.

[leroy17]

Baz, here are a few pics, hope this what you are after. There is still room in the guards for bigger, either diameter or profile as Craig said with the 325 45 17.

I have to agree with Craig and Dave, Billboards would be my choice if I was to go to 15's. However 18's may open up some more tyre options as well.

As Mike and Craig W mentioned, lowering will assist with reducing the gap. I have gone as far as I would go (see last pic).

[Baz]

Originally Posted by leroy17

Baz, here are a few pics, hope this what you are after. There is still room in the guards for bigger, either diameter or profile as Craig said with the 325 45 17.

I have to agree with Craig and Dave, Billboards would be my choice if I was to go to 15's. However 18's may open up some more tyre options as well.

As Mike and Craig W mentioned, lowering will assist with reducing the gap. I have gone as far as I would go (see last pic).

Thanks Mate,

These pics have solved my problem.



Baz

[Mando]

Leroy17' the rims look fantastic, who made them? I reckon your car sits just right.

Regards.

[leroy17]

Originally Posted by Mando

Leroy17' the rims look fantastic, who made them? I reckon your car sits just right.

Regards.

Mando, the rims are the same as yours. Pin drive with a centre nut as the spinners sit out to far.

A friend of mine made up a satin metalic gunmetal powdercoat (awesome powdercoater - would recomend to anyone), we redid the centres. Bolts are replaced with hi tensile low head ones which were then sent to a place in Melbourne and were hot black oxide coated (these guys coat many items for 888 Racing and some other V8 supercar teams). Wheels rebuilt, the low head bolts sit just about flush on the wheel centre which I think cleaned up the appearance and the satin finish reduces the reflective surfaces and edges that the wheels has for a more consistant look.

Baz, good to know the pics were o.k.

Cheers.

[Merv and Sharon]

Yes Leigh, it is looking great. I would stay with the 17". Those disks and rotors may not fit in otherwise.

[750hp]

It's a bit quieter now that the side-exiting pipes are gone and 4 big mufflers have been fitted. You should have come to Hope Island on Sunday...