I have 402,768 miles on my 1982 300 TDT. I have run Bridgestone and Michelin tires. I have tried going up one width in size. The car handles and rides better with the 195 70R 14 tire, which is the stock size.
I have Dunlop A2s on the car right now and I like that tire quite well. You can get them on-line for $64 plus shipping at the TireRack.com
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They are H rated speed radials, which are recommended for my car.
I like Wal-Mart for mounting and balancing. That will cost you an additional $20 or so per tire for lifetime guaranteed balancing and mounting. (It might be a little less)
I have had terrible luck with CostCo tire places. They have sold me tires that were out of round, their tire guys have bent rims and refused to admit it, they have twisted off lug bolts, and their balancing is lousy. I will never go back there again for tires, period.
" Dunlop SP Sport A2 Plus
"The SP Sport A2 Plus is the enhanced descendant of Dunlop's popular D60 A2 High Performance All-Season radial. The SP Sport A2 Plus was developed to deliver year round performance for the drivers of sport cars, coupes and sedans. The SP Sport A2 Plus is designed to blend long treadwear, responsive handling and dependable traction on dry and wet roads, as well as in light snow.
"On the outside, the SP Sport A2 Plus molds a longer wearing tread compound into a mildly asymmetric tread design that features outside shoulder blocks with minimal siping to enhance steering response and cornering stability while the inside shoulder blocks feature more sipes to provide the additional biting edges to aid traction in foul weather. The SP Sport A2 Plus radial's 3-rib center contact patch is designed to enhance dry, wet and light snow traction during acceleration, braking and cornering. The entire tread design features Dunlop's "CHAOS" pitch sequencing of tread block shapes and sizes to help reduce noise and increase acoustic comfort. On the inside, the SP Sport A2 Plus features twin, high-density steel belts reinforced by Dunlop's JointLess Band (JLB) nylon to enhance driving control and provide long, even treadwear while minimizing weight and enhancing ride quality. Additionally, hard rubber bead fillers and a high ply turn-up enhance steering response and cornering stability."