Sneak Peek!

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This one’s hot off the press, or at least hot off the drawing-to-jpeg converter dealie I just downloaded.

The new Song parts are lighter, stiffer, & sexier. Changes from the protos you’ll see the ti brace located below the assembly, which is now an integrated nut plate as well, further reducing the assembly weight. The chainstay mounts got thinner, sleeker, lighter…. same for the BB mount. The flex plate itself now has more tire clearance & will work splendidly with shortish chainstays on the Song 29. Beauty, eh?

We just sent off the files to the machine shop. I’m so excited I could poop. 😉

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12 thoughts on “Sneak Peek!

  1. Wow, that’s a big change there Brendan. Things are sooo tight in that area that I really didn’t expect to see this much gain. Very impressive!

    Try to contain yourself though, otherwise you’ll be doing the laundry for the next month! 😉

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  2. GT, we managed to get just about a half inch more clearance out in front of the tire, and a little extra on the sides, too. Did you notice the svelte brace on the bottom? Maybe I should put up another jpeg from another angle.

    Jruss, that’s funny. I have to admit the temptation was there, but only for a split second. After a little head scratching, titanium was the obvious choice, it just took a while to figure how much of it needed to go where… We’ll have a couple/few of these at the Pueblo. You’ll have to stop by & kick the tires.

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  3. Dude,
    I love being so excited that I could poop! I thought that I was the only one! I cannot wait to take a ride man! These look like amazing changes and I would love to see another view….

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  4. Awesome work there amigo. Tha’s not just a flex plate – that there is a “Collier Flex Plate!”

    Are you sure though that 3 nuts are a good idea on the BB shell clamp? I would prefer a bored out clamp threaded female so that I would not have to worry about lost nuts – or carrying a wrench on the tool kit.

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  5. The nuts on the clamp are a bit of a thorn in my side, but… There wasn’t enough room for a key insert, and they don’t seem to make them small enough anyhow…

    Plus, I don’t want threads to be an integral part of the frame. The idea with using nuts & the brace-come-nutplate is that the threaded parts are all easily replaceable- worst case you can find hardware for it all in the middle of nowhere. Even if you strip out the brace, for example, you can run a longer bolt & nut through & get on with your day. This could be especially handy if you’re in some other country, doing a GDR-type race, whatever.

    The other thought for the BB mount was to use a titanium nutplate, which might look nice, but would actually be heavier than the three nuts, assuming it’s a few threads (or 1 1/2x the diameter) thick.
    I’ve considered drilled hardware on the bolts, so they can be safety-wired a la airplanes… but in practicality these nylock nuts pretty much don’t come undone. We used them in the USAF on helicopters without safety wire.

    So, that’s why it is the way it is… Thanks for the thoughts!

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  6. You are prolly right about the nylon locking nuts – I just really don’t know any better about their performance. If (and I assume my following comment is irrelevant, btw) they do have performance issue, I suppose what could work the old style seat post binder “long nuts” (err…stop laughing….what the hell do you call those things?) where the nut actually had a hex head and long body and accepted the male rod. But yeah I suppose the nylon locking nuts have a good history – I just don’t know any better.

    I suppose my next comment on the Al parts would be to smooth out the surface as much as possible. With unpredictable fatigue life on the Al parts, your concern is micro-fractures from machining. (think small micro cracks on sharp edges machined away) Something like a shot-peen or vibatron smears the surface and makes those micro-cracks disappear. (make sense? I don’t communicate all that well on the web) Micro-cracks are where the failure start.

    As far as where the flexing in the ti plate occurs, that is something that I am most fascinated by. Can’t wait to follow this one.

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  7. M- I know where you’re going with the surface conditioning on the aluminum parts… as in a post-machine tumbler. However, this may be where we start to leave the world of bicycle makin’ & moving toward the world of FEA slavin’ that you live in! To my knowledge, virtually nobody in bike industry does this, at least not on a parts level. On the other hand, I suspect a lot of these bikes will be anodized, which will include a pre treatment bead-blasting. This is something I’ve been interested in as it will also toughen up other wear surfaces on the frame, such as the dropouts on a singlespeed. Diggit?

    As for the where & how in the flex plate- that’s all in the modeling & analysis- which I’m reluctant to share here. If you want to see that stuff it’ll take a visit to Idyllwild with a 6 pack! 😉

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