S&M WTF... what the fuck?

I'm sorry to do this to you, but I'm going to embed this. You have my sincere apologies for any skating or skaters that you might see, but this is something:



The S&M WTF. Being over here on the other side of the world I don't have that patriotic little piece of DNA that genetically pre-disposes me to loving everything that S&M do. But I like this. Sure all these ideas aren't going to work. Maybe even none of them will end up as practical, but it's a whole lot of radically different ideas packed into one bike. It'd be cool to ride the thing and see how it feels.

In case you didn't watch the video, here's the run down: The S&M WTF is a complete bike that weighs in at 20lbs without a piece of titanium in sight (and at a guess I'd say without any post-weld heat treatment either). The fork legs are shorter by 1/2". Wtf? To save weight. And the head tube is 5/8" shorter than a standard frame. That's got to really change the geometry of the frame - have they adjusted the BB height and head angle to compensate? Don't know.

Then there's the shorter pitch chain and the sprocket with little miniature teeth to fit the chain! Wtf? Apparently this allows for even smaller drive trains than what's around now. Read: 7 tooth rear driver. It's an interesting idea, but it's going to have to do some serious self-promotion before everyone rushes out for new sprockets, drivers and chains.

Next: The Black hole dropouts on fork and frame. Clearly it'll work on the fork, though I think people will need a little convincing as to the point of it, but on the back end? Wtf? How's that going to work? Really small drive trains with no chain adjustment sounds like chain slap hell to me.

And just for the record, not only does the hub have brass bushings replacing the driver bearings, but there are also little holes drilled in each of the driver teeth. It's all getting very cute.

Subrosa...

Here's something that's been kicking around for a while.
It's a twin top tube frame from Subrosa. Not scheduled for production as yet, but it's definitely out there and being riden by Justin Kosman.
It's different and you'd have to say "retro", but definitely not an engineering advantage ie. it's not stronger or lighter than a regular frame. In fact it is either a) weaker or b) heavier.
But at least it's something different. Credit for that.

It looks pretty nice from this angle, but looking down of a split tt with gussets and braces and things might not look so clean. Check this thread on BMX forum about the frame.