I think I got it from nova cycles. It was listed as a thick walled mountain bike head tube and was considerably stiffer than the thin 1" headtube on the stock frame. Was super cheap, like $10, since its a big heavy tube and most high end bikes use much larger tapered tubes with way thinner walls for weight savings. Not many people looking to add weight to a bike they are building from scratch! OD is much more important than wall thickness as far as strength is concerned - just going from 1" to 1.125" diameter is something like 30% stiffer with the same exact material and wall thickness used. If you increase wall thickness at the same time, its even better. It was a very tight fit for my headset though...I ended up freezing the cups, heating the ends of the tube with a heat gun, and getting a huge 1/2" threaded rod and some massive washers and nuts to press the cups in. Set the bottom nut on vice and tightened the top one with a huge 1' adjustable wrench until they finally seated.Thanks for all the info! I was just going to copy the cranbrook headtube angle lol! Where did you get the headtube from? All I was finding was tapered road bike sh*t.
Been working on the i beam frame jig, among other things today. ADD like a mofo this weekend. Anyway the plan is to make brackets to weld the crank bearing cups to the jig. I think. The frame has too much rake. No measurements yet but you can see it. So once the headtube angle is changed the front of the frame will come up. The bottom bracket is low on this bike so I thought about just a stretch but it will need a drop just to keep the bottom bracket height. Basically the frame will rotate on the bottom bracket. The front will come up and in and the rear will go down and out. Was planning a 2 inch stretch but with the front wheel come in some it wilk probably end up around 3.5 inches. Lots of thinking to do. Hope this mess makes sense, was thinking as I typed.
Thats freaking huge, the stock cruiser 1" head tube I measured was literally 1mm wall thickness...that tube is 3mm LOL! You measure that 2mm on the OCC at the flange where the headset goes? Maybe its tapered? Thats huge for a stock head tube. I have the 1.6mm wall chromo one. Its waayyy stronger than the 1" 1mm wall it replaced, at least double the strength plus I boxed it on top of that. 60% thicker walls, chromo vs mild steel, and 1.125 vs 1".
They used to be kinda slow with processing years ago but the prices aren't bad. Never heard of that size tube lol.
