MT SRs are bias ply tires, STs are radials. I am looking into the STs for new rear tires for my replica.
Pricing for the size I need seems to run in the $140-$150 rangs, plus shipping, installation and balancing.
I have heard that Cooper makes the MT line of tires and that the Cooper Cobra tires are essentially identical to the MTs at a lower purchase price.
Hope this helps somewhat!
Cheers!
Dugly
