When did you replace the rear shocks? What did you replace them with? My rears were blown and it caused this, I didn't even realize they were blown because it was so gradual of a change. The bounce test didn't work because the springs are stiff.
Checking the rear shocks is extremely easy-
Put the rear of the car on jack stands, support the lower control arm with your jack and remove the shock mounting bolt. The control arm will swing down a little bit and should give you enough room to try to compress the shock to check for damping.
It could be toe and the camber both causing wear, the 3 has a pretty aggressive alignment setup that's not very friendly to tires. If you have them set it to spec they will just get it within range. You can have them zero your toe but the camber is not adjustable without installing adjustable upper control arms. Go get a free alignment check if you can find a shop nearby that does it and compare against your alignment from 4 months back.
2005 Mazda3 Hatchback
2.5l L5-VE 5 speed
KYB GR2, Eibach Pro-Kit, MS Sway Bars F/R, MS3 Exhaust
Last edited by antics; 06-04-2016 at 04:59 PM.