This is played with 8-string guitars on ½step down tuning.
I didn't find this tab anywhere. I watched Meshuggah's own lesson for this riff and it
like this.
Everybody don't have 8-string guitar, but this is right tab for 8-string guitar.
Rhythm is ooo-o-ooo-o-ooo-o-ooo-o-...... etc
5/ means you have to bend fifth fret.
Eb-----------------|Hb-----------------|Gb-----------------|Db-----------------|Ab-----------------|Eb-0------0-----0--|Bb----5/-----5/----|F------------------|
I don't have time to tab whole rhythm and bending. hope you understand that way.
Then the lower part of the riff goes like this for real
Eb-------------------------------------|Hb-------------------------------------|Gb-------------------------------------|Db-------------------------------------|Ab-------------------------------------|Eb---------------------1--10--4--------|Hb-------------------------------3--0--|....F--1-------------2--5------------------|
so, strum that certain fret for the certain rhythm.
Hope you get it :)