Is this where we post rule change/transfer requests? Or via email or letter? The STCA have an online form...
I am suggesting the DLRA rule for OEM wheel diameter be included in the STCA ammendments
7.8.10 Wheels
"Wheels shall have a minimum nominal diameter of 15 in. except in a Sidecar and Streamliner classes."
updated to...
"Wheels shall have a minimum nominal diameter of 15 in. except in a Sidecar and Streamliner classes or if OEM."
This will have no safety impact as the safety is determined by the tyre properties and associated rules (i.e. smaller wheels are limited by tyre speed rating and therefore cannot go faster than available tyres)
Though...
Having said that, I recall the DLRA rules were "rim" diameter and STCA is "wheel" - if wheel includes the tyre then I am ok

Let me know the correct channel if this is not?
Cheers,
Paul