David Posted October 16, 2006 Report Share Posted October 16, 2006 (edited) Hey, Im making a frame for my A2 DT project. It will be 26" and im looking to make it a street bike (as in short and flicky) Im about 5ft 10", this is what ive come up with so far:Ive just realised the wheelbase is very short, it should be 1040. This is just a quick design by the way to show the dimensions. Edited October 16, 2006 by David Quote Link to comment Share on other sites More sharing options...
RobinJI Posted October 16, 2006 Report Share Posted October 16, 2006 Looking good, Very similar to one of my friends 660, and thats a beast to ride. Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted October 16, 2006 Report Share Posted October 16, 2006 At present that's standing about 970mm, as opposed to 1040Add another 70mm or so to the BB-front axle measurement (bit longer TT or whatever) to get somewhere in the region of 1040mmBikeCad is handy for finding things like that...Other than that, perhaps slacken off the head angle by a degree or so too, as 73* on a 26" is possibly a little steep. Personal preference of course, but maybe worth consideringKeep us posted though... Quote Link to comment Share on other sites More sharing options...
chrishayton Posted October 16, 2006 Report Share Posted October 16, 2006 ashtons have a 73 headangle if im not mistaken Quote Link to comment Share on other sites More sharing options...
oakley Posted October 16, 2006 Report Share Posted October 16, 2006 ashtons have a 73 headangle if im not mistakenthats one out of 283 frames, i'd drop it to 72* head angle will be mint then, if not on the short side, 1080 is where it is at!joE! Quote Link to comment Share on other sites More sharing options...
Todge Posted October 16, 2006 Report Share Posted October 16, 2006 Headtube is perhaps a bit long? Quote Link to comment Share on other sites More sharing options...
David Posted October 17, 2006 Author Report Share Posted October 17, 2006 Headtube is perhaps a bit long?Hey aaron, Im a bit unsure about the headtube length. What do you recommend using? I will be turning it myself on the lathe so I was also wondering what thickness it should be? Im assuming it should be the same guage as my top/down tubes so it is easier to braze?Thanks,Dave Quote Link to comment Share on other sites More sharing options...
RobinJI Posted October 18, 2006 Report Share Posted October 18, 2006 The inside diameter should be 34mm. You will want to leave enough material for it to be strong, Id go with something like 5mm wall thickness for the top 15mm and the bottom 20-25mm, and 3 for the rest. Quote Link to comment Share on other sites More sharing options...
David Posted October 28, 2006 Author Report Share Posted October 28, 2006 Heres an update: Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted October 29, 2006 Report Share Posted October 29, 2006 Looking good Keep us posted dude Quote Link to comment Share on other sites More sharing options...
adamtrials Posted October 29, 2006 Report Share Posted October 29, 2006 (edited) Looks nice Did you decide to include any innovative features? Edited October 29, 2006 by adamtrials Quote Link to comment Share on other sites More sharing options...
David Posted October 29, 2006 Author Report Share Posted October 29, 2006 Looks nice Did you decide to include any innovative features?I know this might sound lazy or something but no. I want to stick to ideas which I know work and have been tried and tested. I have a few ideas but its a big risk to take and as ive never built a frame before Im following the 'keep it simple, stupid' rule Quote Link to comment Share on other sites More sharing options...
Has anyone seen my shoe? Posted October 29, 2006 Report Share Posted October 29, 2006 Made this in photoshop the otherday when I got bored, based on the adamant A3 with a higher BB.Ignore the shit stays, ill get them sorted when im not hungover. Quote Link to comment Share on other sites More sharing options...
Steve-A Posted October 30, 2006 Report Share Posted October 30, 2006 It will be 26" and im looking to make it a street bike (as in short and flicky) Looking good, although I'd just say that if your aiming for short and flicky for street then maybe geometry is a bit pure trials?If you look at most classic 'street' 26" they have 73 or 74 degree headangles ( p/x zebidis had a 74 head angles), 72 will mena it wont handle as well and feel as flicky to corner. BB ride? I know itm kaes backwheel easier but makes it harder to spin and bunnyhop, and generally ride street fast type moves. 1040 is a managble wheelbase but for the full effect something heading towards 1020 maybe better? or a compromise. This might not be quite what your looknig for, just thuoght I'd put the ideas forward. What I'd call a street trials bike and what many would call a street trials bike are quite different. Quote Link to comment Share on other sites More sharing options...
David Posted November 8, 2006 Author Report Share Posted November 8, 2006 Another update:Does anyone know what the rake is of echo urban forks?? Also I want to put a little tube between the chainstays to support them but theres not much room, dont really want to lengthen the chainstays either. Could weld a plate on?Thanks,Dave Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted November 8, 2006 Report Share Posted November 8, 2006 Not too sure on the rake of the Urbans, although I would imagine it would be in the region of 45mm or so, like most other forks out there.As for the chainstay strengthening, a tube would be good if it will fit, but a plate or something should be fine/just as good really. Iolo uses them if I remember correctly, and I don't think there has been a problem with that approach.Other than possibly just shortening the head tube a touch (although not necessary) I think that's coming on nicely for what you are aiming for Quote Link to comment Share on other sites More sharing options...
RobinJI Posted November 8, 2006 Report Share Posted November 8, 2006 You could do what Iolo did with my frame, Put a tube cut in half length ways across, so its like you've moved the brace so far forwards that its half in the BB shell, and put a plate going along the bottom of that and then onto the bottom of the stays, could put a plate on the top too if you're worried.Can kinda see it in some of these pictures Quote Link to comment Share on other sites More sharing options...
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