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http://www.ifbikes.com/assets/images/gallery//Ti_X_sp-ti.jpg
Is it just me, or does this look like it was built for a road fork and then had the longer cross fork thrown at it as an afterthought? Whole thing seems to be leaning backwards. Colour scheme is shit too, as it is on the 'niner under it.
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^^^^ looks like it has a 700 on the front and a 650 at back...! (i know it doesn't actually...)
where the fuck *is *harry?
he never posts anymore.
oh and murtles bike definitely belongs in porn. -
eh? what's that got to do with my post? would i have been flamed?
a member called "harry major" who works at BLB was convinced that a nagasawa track had a 650 rear and was proven massively wrong a couple of months ago.
it was rather funny :) -
No, the biggest T1 (58cm) has a 180mm head tube, pretty gate-like for a modern track bike. In fact, even the 51cm has a 120mm head tube, compared with 100mm on my 53cm Koga, so they are all pretty tall.
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Have you ever owned a Cinelli Alter/Integralter/Angel? The stem body is immensely stiff compared with the thin walled tube which wraps around the steerer. As kerley points out, you can generate a proper clamping force as long as the steerer tube fits precisely into the clamp bore, because you then don't have to move anything very far to generate the required hoop stress, but in my experience that fit would need to be of the order of a light interference fit to make it work. Meanwhile, you're bending the whole body of the stem to generate your clamping force, which is going to deform to front clamp, and then you tighten the front clamp to stop your bars from creaking and that feeds back into the hoop stress of the steerer clamp. The only way to make it work reliably across the range of steerer tube OD tolerance is to make the extension of the stem deliberately flexible from side to side, which is pretty much precisely what you'd try to avoid when designing a stem.
Obviously, the stem will be adequate, because it turns out that you have to try even harder than that to completely fuck up cycle component design to the point where it becomes unusable, as witness supermarket BSOs, but it will necessarily be less stiff than a well designed stem of equal weight or heavier than a well designed stem of equal stiffness. There is clearly a market for novelty stems where looks totally dominate the design over function, and this is one of those.
From what I can tell by, and this is only a cursory Google Images search, the Angel had bolts at the rear. To me it just sounds like the Cinellis were a poor implementation of the design, rather than definitive proof that it doesn't work.
I would also suggest that a small degree of "give" in the walls of the extension of the stem does not automatically render it prone to noticeable amounts of torsion. That said, I've not tried the BMW stem nor have I seen any lab tests, so I'm not really in a position to comment on the efficacy of the design.
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From what I can tell by, and this is only a cursory Google Images search, the Angel had bolts at the rear.
Both bolt positions were produced, I'm not sure in which order.
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@Velocio
What frame is this, anyone know?