Roadsmart 3 vs 4?

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For you Dunlop fans........is there a significant difference between the RS3 and RS4?  Remember, I'm not doing track days. 

A finishing nail has accelerated my tire purchase by a month or two......

Not a Dunlop fan..., until recently. See prior threads.

Rode one set of IIIs and immediately went back to Metzlers.  Finishing my 3rd set of IVs.

Only reason to ride the IIIs is to cmpare to the IVs. A lot easier to spend the extra money when you know what it buys.

Wair.... Do you have photos as to how a finishing nail killed a tire?

   
The little SOB went in at a 45-degree angle just outboard of the centerline.  The tire was scheduled to be replaced in 2000~2500-miles at ~9000-miles of tread life.  I tried to plug the hole, but the reamer went straight in instead of following the angle of finishing nail.  The first plug (tar-covered thread type) held for a 45-mile ride, but leaked to zero pressure by this morning.  I tried a second plug this morning adding a good glob rubber cement the new plug.  The first plug push thru and rattles around in the tire.  There was no "self vulcanization" with that plug material to tire.  The second plug is leaking slowly using a soapy bubble test.

I'm guessing there's more damage on the inside of the tire than one would have expected from a finishing nail.