If your wheel bearings are due for a change or atleast a repacking good time to do it. If not, I found out the hard way on the first that you dont have to completely disassemble. lol After front passenger drivers side took like 20 minutes rears were a breeze. Side note. if using the pads from R1 mine took atleast 200 miles to seat real well. Felt scary soft for the first couple days. Make sure to do the break in that they come with. At around 500 miles on them they stick like glue really happy with them.