Daren, there is a weight difference across different brands and the same brand with different sizes even if it is minor. Some may be the exact same and some won't, depends on the tire brand. Then again I'm never going to a 235 tire, I only compare a 215 and 225 tire. Yes 1 lb matters to me . Softness and thickness of the sidewall matters to me too. Don't think I'll ever run a 235 on a 1g AWD

I've been driving around on 215/45/17 for a long time in 1g DSM's, I don't just go with what works and looks good on paper
11.00@136 (FP3065) and 11.6@120 (16g) on almost bald 215/45/17's street tires, with not much failure compared to how many passes I have done at the track. If someone else has a comparable car with bigger tires, chime in.

I couldn't imagine running 18" 50 lbs weights at the end of each one of my axles just because they look good. Making all that power just to have it robbed by 50lbs slugs is a good way to slow your car down. That's just asking for something to break when your making power, probably similar to Shandon's situation. He mentioned to me the weight of his 245/45 rim/tire combo is 47 lbs. Too heavy.

Hey might even be why your running 12's on a FP3052 when you should be in the high 11's at low boost