found a 1971 raleigh grand prix bike. sanded and paqinted ,looks great. i am clueless on mechanics. my rims are steel,heavy,marked rigida H.P. made in france,slightly rusting, 27 by 1 1/4" H.P. for couple dollars found shimano hub and araya light alloy rims, these marked 27 by 1 1/4 w.o. they...