I'm thinking of Specialized Hardpacks 1.5 or something.
Whilst I haven't got any spare, I have just picked up a set from Halfords because they have a very good sale on at the moment (my only reason for entering the orange and black hole
I have purchased a kevlar pair of Panaracer 1.8's for Â£30. Good value in my book.
If you are planning on going off road on your MTB, are you sure you'd want to go that thin? I've done 1.75 Z Max's in the past, and certainly wouldn't go any thinner.
If you have gone 'thin' before, don't just jump down to 1.5's. Work your way there slowly and get used to how the bike handles first as it's a new experience
1989 Specialized Stumpjumper
1996 GT RTS-2