Hi
Not content with buggering up my original bike, I've noticed a couple
of frames on ebay that I could play around with:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7119093437
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7118344114
Actually, I'm interested in the frames because the 'current' bike -
Record Sprint 21" (I got it when I was 15 and supposed to carry on
growing) has never been the right fit - the saddle practically sits on
the seat post for a very pedestrian look! My inside leg is 75 cms so a
seat tube should really be something like 49 cms (i.e. first link
above) according to the general formula.
Taking how to measure the tube Sizes from here,
http://www.coloradocyclist.com/bikefit/, I'm now a little confused
about the size of my supposedly 21" frame.
I get:
Top tube: c-c 56.5 cm
Seat tube: c-c 58 cm and c-t 59.3 cm
Firstly, I expected the seat tube c-c to be more like 53/54 cm. 58 cm
is nothing like the 21"/23.5"/25" sizes!
Then, my top tube is shorter than seat tube! The two ebay examples
above are 49, 52 and 52, 54 for seat and top tube c-c respectively! The
expected 53/54 for the seat tube would fit in quite nicely with these
pairs of values.
I'd be surprised if anyone could actually go and measure their Record
Sprint 21" frame to check but, anyway, I don't *think* I can make a
mistake measuring something ... maybe they weren't sized according to
the directions on the bikefit web page above.
Oh well, if anyone can clear anything up about the sizings I'd be
grateful!
ccc r
PS Btw, for anyone remembering the Record Sprint, Quasar, Pulsar and
Winner (Oh dear, I had one of these 5 speeds first!) here's a good URL:
http://bulgier.net/pics/bike/Catalogs/Raleigh84 .