Old ones were 88mm waist, new ones are 85 I believe. Also, instead of the skate deck construction all the way through, they had a full length veneer on the topsheet, and the bottom layer, right above the base. Everything in between is their maple macroblock core, with sidewalls. Supposed to have the durability of the skate deck, but the responsive, damp, great feel of macroblock+sidewall. Then they topped it off with I think a (2000?) racebase, although I'm not sure on the number... Sounds killer to me!