Modern Ti HT frame (warning not actually made yet)
- Thread starter skinheadjc
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skinheadjc
Retro Guru
oh, ok sorry 
when you buy a 2k+ ti frame you also pay for the builders geometry knowledge and experiance, which is what you dont get with Xacd.
You ask for a frame with some specifics and the send you a drawing to approve.
If your not proficient in reading CAD drawings its quite easy to end up with some thing you dont want. The first drawing i recived i'd asked for geo baised on a an ON One 456 (just to get an idea on price, tube sizes etc) so i sent a geometry sheet over. 24hrs later they sent back a drawing which looked geat - except that head angle was 69.5 degrees baised on a fork length of 425mm not 500mm like an average 130mm travel fork would be.
when you buy a 2k+ ti frame you also pay for the builders geometry knowledge and experiance, which is what you dont get with Xacd.
You ask for a frame with some specifics and the send you a drawing to approve.
If your not proficient in reading CAD drawings its quite easy to end up with some thing you dont want. The first drawing i recived i'd asked for geo baised on a an ON One 456 (just to get an idea on price, tube sizes etc) so i sent a geometry sheet over. 24hrs later they sent back a drawing which looked geat - except that head angle was 69.5 degrees baised on a fork length of 425mm not 500mm like an average 130mm travel fork would be.
SeeingisBelievingGTMuseum
Old School Grand Master
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skinheadjc":22bt4kiy said:
Then you should demand pictures of welds BEFORE the frame has been bead blasted or cleaned after welding. I have seen many broken Ti frames where the welds looked as your picture above, that failed due to oxygen embrittlement.
skinheadjc
Retro Guru
Xacd had quite a poor reputaion when it comes to forks produced pre 2004, which had a tendancy to snap (they were made for Sibex and Spicer).
There are various stories around why they snapped, from tube thicknesses to contaminated welds. I think it may be a bit of both, you can see in the picture above that both fork legs snapped at the bottom of the weld joint, so it is proberly a contaminated weld in this case. However there are other examples where they snapped further down on a single leg, so the tube thickness is more likely the cause.
I've not heard of a snapped Xacd frame (yet), only this design of fork which was a bit of a copy and doesnt seem to have any design work go into it.
There are various stories around why they snapped, from tube thicknesses to contaminated welds. I think it may be a bit of both, you can see in the picture above that both fork legs snapped at the bottom of the weld joint, so it is proberly a contaminated weld in this case. However there are other examples where they snapped further down on a single leg, so the tube thickness is more likely the cause.
I've not heard of a snapped Xacd frame (yet), only this design of fork which was a bit of a copy and doesnt seem to have any design work go into it.
skinheadjc
Retro Guru
Looks like the ti project is going on hold for a while (well at least untill i sell my house).......
I just couldn't raise enough funds (selling two frames) and then justify the extra spend past the wife.
So i'm going to get a meium Singular Hummingbird which has almost exactly the same geometry as what i want - its right at the top of my revised budget (£380 without the fork suppied) but looks great.
I just couldn't raise enough funds (selling two frames) and then justify the extra spend past the wife.
So i'm going to get a meium Singular Hummingbird which has almost exactly the same geometry as what i want - its right at the top of my revised budget (£380 without the fork suppied) but looks great.
That cad drawing looks almost the same as the design I did for my Setavento a few years ago, took a while to persuade them thats what I wanted.
For info about a year ago the seat-stay/seat-tube weld developed a crack. Had it repaired and its still going strong now.
For info about a year ago the seat-stay/seat-tube weld developed a crack. Had it repaired and its still going strong now.
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