The specialized slaughter grid 2bliss ready 650b275 mountain bike tyre is the result of riders asking for a tyre that can enhance speed while still giving them confidence on cornering by lowering the centre tread for high speed yet keeping plenty of knob edges for secure breaking gets you to the bottom first much taller side knobs give you confident cornering traction designed with as a rear tyre in mind however it can also be ridden as a front available in 650b 275 in 23