Classic & Vintage - Raleigh Grand Prix frame material??

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.



PDA
jtricer1973
10-19-08, 08:37 PM
Hey guys, I have a 1974 (I think) Grand Prix. I was wondering what the frame is made of ? I don't think its Reynolds 531. If not 531, whats the difference ? Is it weight? If so, how much heavier would my frame be than a frame made from 531 ? Their was a decal on the seat tube but its gone. I think this told the frame material.

Here is a link to an earlier post where I posted pics of the bike.
http://www.bikeforums.net/showthread.php?t=473499&highlight=prix+grand

purevl
10-19-08, 08:42 PM
It's almost certainly 20-30, which is just regular ol' hi-ten steel.

The difference is the percentage of other metals alloyed into the steel.

Yes weight is part of it, also material strength and ride characteristics.

A few pounds.
USAZorro
10-19-08, 08:45 PM
Correct. 20-30 steel. It will be 1.5 - 2 pounds heavier than straight gauge 531 (which would have a 26.8mm seat post).