4.30 W/28" Rubber or 3.90 on 26" Shoes?

In was able to hobble out to the barn & did some closer checking. It's hard for me to get around right now after total knee replacemnt surgury so bear with me.

I have about 11" tops from the spring to the outer fender. 275 series drag radials need about 12"

28" (radial) rubber is out of the question so it looks like 245/55R15 M&H Drag Radials will be on the rear.

26" diameter, 9" tread width, 9.9" section width.

http://www.mandhtires.com/M-H-Drag-Radials?product_id=159

The smaller diameter tires will be better for acceleration anyway & I don't think the \6 will overload the traction capabilities of the smaller tires.

The OEM tires are smaller than 26" so it will still look good W/26" rubber all around.