Originally Posted by
ksisler
Given the spec of 1/10" gap diameter for the lug to the tube. That might be a bit tight - lets see what others think, but for now, lets use it and the URL for aircraft spruce offered by EpicBike101 to see what off the shelf CroMo tubing might be close to the need for lug making with the OP's current tubeset;
1.125 (1 1/8") your seat tube
-- Needs lug ID=1.225" for 1/10" gap as stated
-- 1 3/8" 0.058" wall with 1.259 ID might work
-- 1 3/8" 0.065 wall with 1.245" ID might also
-- $4.55/ft for either
1.248 (1 1/4") your top tube
-- Needs lug ID=1.35" for 1/10" gap as stated
-- 1 1/2" 0.083 wall with 1.334" ID might work
-- 1 1/2" 0.065 wall with 1.370" ID might also
-- $4.95/ft for either
1.49 (1 1/2") your down tube
-- Needs lug ID=1.60" for 1/10" gap as stated
-- 1 3/4" 0.065' wall with 1.62" ID might work
-- $8/ft
Hope that helps
ksisler
Holy midget!
I think I've ordered wrong tubing? I wa looking for a gap between 0.005 inch and 0.009 inch, this what i've read on a forum that is just about what would be good for silver brazing?
I've noticed that I gave wrong dimensions in the first post, I'm really sorry, I don't remember how it came up like that, anyway these are the dimensions:
31.8mm is 1.2519 Inches
and 28.6 is 1.1259 inches
(this is the size of the columbus oversize tubing for lugs, as given dimensions here:
http://www.cycle-frames.com/bicycle-...D-TUBESET.html
So can you please help me in confirming that did i or not order wrong:
-for 1 1/8 inch columbus tubes i ordered 1 1/4 OD 0.058 thick that has 1.134 inch I.D. which will leave a gap of 0.009 inches
-and for 1 1/4 columbus tubing i ordered 1 3/8 O.D 0.058 which has I.D. of 1.259 which will leave a gap of 0.007 inch (calculated from exactly 31.8 mm columbus O.D)
Please help me out
thanks and very happy new year!!