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 fit but the japaneese rims are narrower,why both are 27by 1 1/4 only the h.p. or the w.o. diffrent,is there diffrent style rims though sane size. i have heard of sew ups clincher etc. can i put my raleigh tires from one to other rim?. any advise appreciated. the hubs think marked on rigidas normandy. shimano rims and hubs so much lighter.