The rear shock looks to be an Ohlins << great shock if it is. Can you measure from the mounting bolt where the a arms mount to the frame to the ball joint,? Both upper and lower. Rims are prob flipped as stated, or a different offset...The a arms do look longer but it maybe an illusion? Cut fenders, flipped rims, shorter shocks will deff make it a bit wider.. As fast6hand stated,, be carefull with that rear swing arm , look close for cracks etc..
BTW, Welcome .