So I thought I would get some lightweight disc rotors for my lighter weight wheels.
I'm running XT front and deore rear disc brakes.
I've fitted the lightweight rotors and my brakes became next to useless. The rear would barely work and even when un weighting it dragging it down a muddy slope it struggles to lock.
I thought it must have been the rotors so I've been and grabbed an XT rotor for the rear with a bit more meat on it and while the brake now seems better it's still not perfect and the pads are squealing a lot under heavy braking.
Any ideas?
Do I need some new sintered pads instead of the OEM organic stuff?

