Re: [CR]Freddie Grubb


Example: Events:BVVW

From: "THOMAS ADAMS" <KCTOMMY@msn.com>
To: <Wdgadd@aol.com>, <sbarrie@bellefield.worldonline.co.uk>, "Classic List" <classicrendezvous@bikelist.org>
Subject: Re: [CR]Freddie Grubb
Date: Wed, 16 May 2001 07:09:29 -0500


My understanding is that this size of seat post is an indication of a heavier gauge of tubing, i.e. Reynolds Special Tourist as opposed to Reynolds Competition. I didn't see the original post, but is there a tubing sticker indicating anything about the model of tube set? Is it a large frame, that might require a heavier tube set?

Tom Adams, Kansas City


----- Original Message -----
From: Wdgadd@aol.com
Sent: Tuesday, May 15, 2001 9:33 PM
To: sbarrie@bellefield.worldonline.co.uk; Classicrendezvous@bikelist.org
Subject: Re: [CR]Freddie Grubb


A 26.8 seatpin would seem to imply a seattube (assuming a standard Imperial 11/8" OD seattube) with a wall thickness of .8mm at the seat end. I'm arriving at that as follows: 28.6 mm OD (metric equivalent of 11/8") minus 2 times .8mm wall thickness equals 27.0 mm. Subtract .2mm for insertion clearance, for 26.8 mm seatpin size. However, British tubing manufacturers measure wall thickness in Standard Wire Guage (SWG) so actual thickness may be slightly different in conversion to metric. Might a frame of this vintage be built of Accles and Pollack tubing, as well as Reynolds? Also, didn't Raleigh Internationals use a 26.8 seatpin? Would this be the SWG equivalent of a 1.1/.8 mm butted seattube?

Regards,
Wes Gadd