43x14.5x17 SX 121lbs
42x14.5x17 MTR 91lbs
42x14x17 IROK 97lbs
Irok sidewalls are garbage and you know you have issues with sidewalls, 42" mtrs are hard to get a hold of and $$$$. I still think you're best bet is the 43" non sticky but I'm just winging it too
Get some of those 17" bling lightweight racelines that TC breaks and you'll have a wheel/tire weight lower than the sticky 42 on a steel weld on beadlock.