steering column tubes

[erikinop]

any reccomendation on what type of recycled tube to use for steering column extension on 2 or 3 frame tall bike? i'm going mens road frame bottom to womens mtb top. just staking them on top, welding top frame BB to bottom frame/seatpost

can i use the top tube from a road bike or something? im not in a position to pay for anything

thanks

here's my rough diagram.
http://www.erikino.com/TALLBIKE2.jpg

got my hands on a baby frame and was thinking of doing the 3:
http://www.erikino.com/TALLBIKE.jpg

[ka12na]

forgot this

http://www.clipartheaven.com/clipart/construction/ladder.gif

[Johnny Payphone]

quarter-inch gas pipe will sleeve down inside your steer tube if you're lucky.

Skip the middle headset entirely and add supports elsewhere. Only the top and bottom cones need be aligned!

http://www.chicagofreakbike.org/pornosquad/largemarge2.jpg

[erikinop]

using a straight bar (handle bar) seems to work. i think it was 25.4

[erikinop]

made it work:
http://photos-091.ak.facebook.com/ip004/v38/242/80/5501119/n5501119_31117091_1123.jpghttp://photos-523.facebook.com/ip004/v38/242/80/5501119/n5501119_31116523_6915.jpghttp://photos-520.facebook.com/ip004/v38/242/80/5501119/n5501119_31116520_5102.jpg

the bike has been assembled and it works and rides just fine. i'm just trying to get a chain set up that doesn't require the derailer... since the chain goes verticle now the drop outs dont help if i go single speed/fixed. would a coaster brake work with a derailler?

ill post finished product when i can.

[erikinop]

here she is. we call her "brontosaurus/the friendly giant"

she might go pink. just did a quick spray of cheap chrome paint.
http://pe-ip004.facebook.com/v38/242/80/5501119/n5501119_31120383_6110.jpg
for reference:
http://pe-ip004.facebook.com/v38/242/80/5501119/n5501119_31120320_5328.jpg

[erikinop]

the chain line is way ****ed. i've got a coaster brake on the back so i can't use a derailleur. any advice?

[frameteam2003]

Put the BB back in the bottom bike.Run a double sprocket on both BBs,run a chain around both large sprockets,run a regular derailer on rear to small sprocket at the bottom BB.(tandem bike chain type set-up)