[Fot] VDCA, SVRA, VRG, VSCCA Tire Rules

[Bob Kramer]

Mark,

Here is what our TX based clubs list as tire rules for the class
inc;using TR6's.  The 100 Minimum treadwear rating and required DOT rating
technically disqualifies the Hoosier TDR's, but I see plenty of them around
the paddock. Google says the TDR's are something like 40 TW. Other than
that, the price keeps me away. I run the 225-50-15 TOYO R888s.

[image: image.png]

Bob

On Sun, Oct 4, 2026 at 7:38 AM Mark Cook <mecook635 at gmail.com> wrote:

> All,
>
> So, I it is time to replace my Hoosier TDRs on my TR6.  This TR6 was
> previously run in SCCA with Hoosier R7 SM7.5 (Spec Miata).   When I
> purchased the TR6 In 2024, then current VDCA/SVRA tire rules did not allow
> these tires and I switched to the TDRs.
>
> In 2026 SVRA and VDCA changed the rules for Group 8/CP to allow
> the Hoosier R7/R8, as well as the Toyo Proxes RR.  It appears that VRG and
> VSCCA continue to require fully treaded tires in CP/DP classes, like the
> Hoosier Speedster and TDR.  Though, VRG is deferring to other organizations
> tire rules in joint events (VIR / Summit Point with VDCA as example).
>
> I think most of you run in VDCA Group 3, but has anyone running in Group 8
> CP/DP changed or considering changing to Hoosier R8s or Toyo Proxes RR?
>
> Thanks,
>
> Mark Cook
>
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