lukinhasb Posted April 4, 2011 Report Share Posted April 4, 2011 I'm Brazilian and I would really like to start practicing trials, but here it's almost impossible to find trials stuff So I'm thinking on doing my own frame, and use MTB bike parts in the rest... I would like to know some things in order to start this project: - What is the most recommended material? Light, resistant and ideally cheap. - What is the most recommended shape for the frame? Tube, and there's another one like this: (), dtk the name - Any recommended project that I can base mine? - Any other information that could help me in the proccess? Tips, previous projects, photos, materials, stuff Thanks a lot guys, I hope to help spreading trials troughout the world, if I succeed in doing the frame I hope to soon post videos here :D Quote Link to comment Share on other sites More sharing options...
trials owns Posted April 5, 2011 Report Share Posted April 5, 2011 I'm Brazilian and I would really like to start practicing trials, but here it's almost impossible to find trials stuff tartybikes do worldwide delivery for a good price Quote Link to comment Share on other sites More sharing options...
N.Wood Posted April 5, 2011 Report Share Posted April 5, 2011 Marino Bikes are 'home made' steel frames from Peru. You'll probably have to run with steel rather than alu unless you know what you're doing. Quote Link to comment Share on other sites More sharing options...
Revolver Posted April 5, 2011 Report Share Posted April 5, 2011 As it happens, even if you build a frame out of alu, it's a faff to find someone who will just let you slide it into their heat-treating facilities on the sly. On the plus side if you use steel you can cut bits out of old frames, like headtubes, brake mounts, bb shell, so you don't have to make them yourself. Quote Link to comment Share on other sites More sharing options...
lukinhasb Posted April 5, 2011 Author Report Share Posted April 5, 2011 I'm an aircraft maintenance technician, there's some friends of mine who works at a small aircraft fabric, they use aeronautical aluminium there, light and resistant... And I know really good aeronautical welders who said that they can do the bike if I bring in the project... Unfortunately, if I bring in TartyBikes stuff, I'll pay like 98% of taxes lol... No way =/ Thanks for the tips, I was thinking on base my project on Echo Pure 2010, you guys recommend? If so, is there a project made of this frame? I need to know everything about it to make a good frame Quote Link to comment Share on other sites More sharing options...
sstein Posted April 5, 2011 Report Share Posted April 5, 2011 What sort of riding do you do/want to do? How tall are you/what is your build? what bikes have you ridden before? If you are going to get a frame built then you might as well do something custom and designed to suit you rather than just copying something. As for materials it does depend a bit on the riding style and the facilities you have available. If you have someone that can do decent aluminum frames then possibly 6061 alloy (occasionally referred to as aircraft grade) should be pretty easy for your friends to get hold of and is what is used in the majority of trials frames. Personally I am more a fan of 4130 (chromium-molybdenum steel) or some form or reynolds steel as they give a more comfortable ride, are easier to work with and generally speaking will last longer. Quote Link to comment Share on other sites More sharing options...
lukinhasb Posted April 7, 2011 Author Report Share Posted April 7, 2011 (edited) What sort of riding do you do/want to do? How tall are you/what is your build? what bikes have you ridden before? If you are going to get a frame built then you might as well do something custom and designed to suit you rather than just copying something. As for materials it does depend a bit on the riding style and the facilities you have available. If you have someone that can do decent aluminum frames then possibly 6061 alloy (occasionally referred to as aircraft grade) should be pretty easy for your friends to get hold of and is what is used in the majority of trials frames. Personally I am more a fan of 4130 (chromium-molybdenum steel) or some form or reynolds steel as they give a more comfortable ride, are easier to work with and generally speaking will last longer. What sort of riding do you do/want to do? Hmm, bunny hopping on rear wheel, jumping obstacles in the street, good use of balance and stuff... A urban trial How tall are you/what is your build? I'm like 1,75cm +-, around 75~80kg what bikes have you ridden before? My first bike was a simple 24", then I got an BMX, and then a cheap full susp 26", wich I broke the frame 2 times bunny hopping If you are going to get a frame built then you might as well do something custom and designed to suit you rather than just copying something. Perfect, but it's more risky too... Copying an existing project is complex enough o.O 4130 (chromium-molybdenum steel) Yes, I've talked to my friend today and he said he haves this, and also aeronautical aluminium.. I asked him to search deeper about this, to get a good notion of weight, resistance and costs, he'll answer me tomorrow I was thinking on doing it in carbon steel, good option? I heard the alluminium is too hard to temper correctly, and the welds can be brittle... Anyone knows about this? Edited April 7, 2011 by lukinhasb Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted April 7, 2011 Report Share Posted April 7, 2011 Yeah, the biggest difficulty in using Alu is finding the facilities to heat treat the frame afterwards (a little easier if you build with 7005 and have a massive oven as unlike 6000 series you don't have to solution treat it too) Go for 4130 - it's a great material to build from and won't need treating afterwards, plus you can modify/repair it should you need to at a later date. For a streety frame the slight added flex is nice too - not to the extent that frames built from steel are bendy, they're just slightly more forgiving than their aluminium counterparts which are naturally stiffer and more brittle. For 'streety' street (more BMX-influenced and rolly) steel is a great choice. For 'trialsy' street (a lot more static and hoppy) aluminium probably takes the preference Quote Link to comment Share on other sites More sharing options...
sstein Posted April 7, 2011 Report Share Posted April 7, 2011 I was thinking on doing it in carbon steel, good option? NO! Quote Link to comment Share on other sites More sharing options...
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