The specialized slaughter dh wired 650b275 mountain bike tyre is the result of riders asking for a tyre with enhanced speed whilst still giving them confidence while cornering specialized did this by lowering the centre tread for high speed and keeping plenty of knob edges for secure braking getting you to the bottom first much taller side knobs give confident cornering traction proper for rear usage but can be ridden as a front also available in 650b 275 in 23