Sorry, haven't used the new grifo except once at nats (day 2) and can't comment on their durability. The new ones have additional side knobs which is a big improvement. I've had great luck for the most part with older grifos and particularly with Dugasts this year, Barb and I basically shared 3 pairs this year and had zero flats (that probably comes to 20 or so races per pair!).euro-trash said:maybe wunlap can chime in here. This year Grifos went to a different 'finish' on their sidewalls. It looks like a superthin layer of latex. Did that help sidewall durability? I had good luck with the older type, hopefully these are even better. I'm due for new rubber.