I used to run the Shinko 230's. The tire cost about $70 and two tires would last about as long as one tire that would cost me $300. I do all my own mounting/balancing so it was just the cost of the tire that I had to deal with. The compound is a little bit softer, but the traction is obviously a little better than some of the harder tires. Even with the softer compound, I was averaging around 7,000 miles per tire.
Now I am running a 165/80R-15 car tire that I paid $65 for, but I had to do a bit of work to get that tire to fit.
I am about 5,500 miles into this tire and it is only now starting to show that it is being used.