If its just the hub they are the same on all 172s, not sure about 182s as they maybe a different length. As for the whole rear beam, the 172mk1 and cup beams are slightly different, but the bits from your old one needed such as the headlight adjuster can be bolted on. The 182 rear beam will fit but i think some of the brake pipework is different, its also strengthened and has a thicker roll bar.