Knowing the Cost of Gas is now impacting tire and shipping costs, I just purchased the tires; Sumitomo's HTR Z II's from TireRack for $475 delivered to my door. They are 275/40/18 Rear and 245/40/18 Front.

According to the database, mostly all 9" or 9.5" Rear Wheels have 5.5 BS...and the 8" Fronts have between 4 to 5, but the majority are 4.5".....

70 Chevelle BB Conv....

Is this an OK BS for these Wheels/Tires?

245/40 on 18x8 rims - 4.5 BS
275/40 on 18x9.5 rims - 5.5 BS

Thanks - Duff

should be fine

Should look great, what wheel you running?

I've put an order in for Coys C5's 18x8 up front and 18x9.5 out back.... Whoo hooo, can't wait to get em.....