I just got a Norton 3x 46 grit 8"x1" wheel from Hartville. With our Club 20% discount, it is only $36.
I used this to replace a OEM 60 grit wheel from the Woodcraft grinder. This wheel runs silky smooth. It cuts fast, doesn't load up and runs a whole lot cooler. It holds up well; I cleaned up the wheel with a T diamond dresser after shaping two 3/8" tools from scratch. I cleaned up the wheel because I wanted to and not had to. With the WC wheel, I had to dip the tool in water frequently and had to dress the wheel several times because the wheel was loaded up and glazed so bad.
I had tried the Norton 3X wheels from Hartville couple years ago. The wheels were so soft that I had bad grooving problem with very light grinding. I returned those to Hartville.
I have the 80 grit Norton SG wheel on the other side. It is extremely good; but I don't think I use the coarse wheel enough to justify the cost.
Either Norton has made the improvement or Hartville has ordered the correct wheel for HSS tools; I like the Norton 3X 46 grit wheel.