There are lots of factors that can cause excessive brake pad wear on one side or one wheel. The most common is probably rough rotor surface from say worn out pads from before and metal from the brake pads have scraped the surface and is rough or warped rotors or debris stuck btwn pad and disc that might lead to faster pad wear. Other reasons could be air in line of the one tire so it never receives the same amount of pressure for braking, pistons and seal need cleaning and relube to function smoothly, or you need to reset the pressure to factory specs at the proportioning valves on the hydraulic unit for the brake system. I don't have the manual for the 7G so don't know if all this applies to you but it should give you a place to start.
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