Rusevelt Posted October 26, 2007 Report Share Posted October 26, 2007 This tubing rivals Titanium in the strength-to-weight stakes. previously only available to road bikes, but now making its impact on the mountain bike scene...maybe even in the bmx scene. i guess Leeson, and Norco bikes will be more than happy to get hold of this tubing at a fair price and start building trials frames weighing at 3.5lbs as opposed to their current 5-7lb framesets (Yeah the norco 2008 Manifesto frame weighs a heavy 7lbs that cant be right!) for $1000, you can custom build your rig use Reynolds 953 from www.desperado.com. thats too much if you ask me but its only a matter of time when this tubing gets competitively cheaper. Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted October 26, 2007 Report Share Posted October 26, 2007 errrm...personally that sounds like a load of hype..on their site description here, it basically says it is a bitch to weld, so it's not going to be particularly attractive to any industry..unless it really is top top top of the range stuff, with very high budget..don't think they've done anything new either- that steel has probably been around for over 40 years, and since no-one uses it.....well... Quote Link to comment Share on other sites More sharing options...
Heatsink Posted October 26, 2007 Report Share Posted October 26, 2007 An interesting thing that's struck me about Steel frames is a knock on from the fact that due to the mechanical properties of steel, an equivalent strength & stiffness piece of tubing to an Alu one will have a smaller diameter. This means skinnier tubes around the bike except for the regions which are set like the BB, headtube and to some degree the seattube. What this means is that you often see the high stress regions like the BB having big jumps of geometry from large tubing to skinny. On Alu frames I notice a natural reduction in this step and also the ease of using yokes to further smooth the transition of force. As a result, due to fabrication and tubing size I think that steel frames have a bit of a disadvantage in minimising stress risers at the joints. Difficult to gather any meaningful practical data on this, but certainly the sort of thing that anyone interested in bike frame design and materials should consider and can do some analysis on.Steve Quote Link to comment Share on other sites More sharing options...
mehukatti Posted October 27, 2007 Report Share Posted October 27, 2007 (edited) Yeah the norco 2008 Manifesto frame weighs a heavy 7lbsThat is total bullshit. There must be an error on Norco's website where that weight is listed. Even the heaviest dirt jumping frames made from "water pipe" tubing hardly weight that much. I had an older Norco Team Trials frame which was also made from the same Reynolds 853 tubing as the Manifesto, and its weight was about 4.5lbs. The Manifesto should be under 5lbs. I can weigh out mine when I get it. Edited October 27, 2007 by mehukatti Quote Link to comment Share on other sites More sharing options...
craigjames Posted October 27, 2007 Report Share Posted October 27, 2007 ive read some reviews on road bikes with this tubing and its just as exspensive as ti, a bit heavier and strangely enough not as stiff, i dont think its going to be anything great for trials riders. its cost is too high and doestn offer any real advantages over ti, which is still too exspensive for the majority of people. alu will pretty much always be king in this industry. Quote Link to comment Share on other sites More sharing options...
Rusevelt Posted October 29, 2007 Author Report Share Posted October 29, 2007 Yeah thats very true. its early days for this tubing in terms of price, processes of tube-strengthen like AIR HARDENING, types of welding ie; brazing. but yeah, alu is pretty much the dominate force for current trials frames market. Quote Link to comment Share on other sites More sharing options...
mehukatti Posted November 5, 2007 Report Share Posted November 5, 2007 the norco 2008 Manifesto frame weighs a heavy 7lbs that cant be right!FYI, that weight was removed from norco.com and replaced with 4.7lbs (2.13kg). Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted November 5, 2007 Report Share Posted November 5, 2007 An interesting thing that's struck me about Steel frames is a knock on from the fact that due to the mechanical properties of steel, an equivalent strength & stiffness piece of tubing to an Alu one will have a smaller diameter. This means skinnier tubes around the bike except for the regions which are set like the BB, headtube and to some degree the seattube. What this means is that you often see the high stress regions like the BB having big jumps of geometry from large tubing to skinny. On Alu frames I notice a natural reduction in this step and also the ease of using yokes to further smooth the transition of force. As a result, due to fabrication and tubing size I think that steel frames have a bit of a disadvantage in minimising stress risers at the joints. Difficult to gather any meaningful practical data on this, but certainly the sort of thing that anyone interested in bike frame design and materials should consider and can do some analysis on.Steveyeah, most steel frames that i have seen have gone on the welds where the main tubes meet the headtube and bb! but i think it may be down to the quality of the weld more than the differences in size of tubing. i dont think it matter what size the piece is that your welding TO, its more the size of the WELD. on a different note, i'm prettey sure the larger diameter the tube is, the stronger it is. purely on the dimension side of things! Quote Link to comment Share on other sites More sharing options...
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