What is an adjustable chain stay?
 

basic, stupid, and probably easy but I just don't know. thanks anyone who helps.

Um...are you talking about a chain tensioner?

not something that exists...yet

at least as far as I know.

Is this a stealth product promotion thread?

Hey guys I found this really GREAT new product that gave me six pack abs and increased the size of "that certain part" of the male anatomy :)

waht**********??? Tell uss!!!!!!

I'm not sure this guy on craigslist has an old single speed trek with an "adjustable chain stay"

here it is...http://sacramento.craigslist.org/bik/1370751330.html

I think he just means it has horizontal dropouts - i.e. the length from the bottom bracket to the rear axle can be 'adjusted' by the length of the dropout slots.

Black Sheep had one at the recent RMBS.
Similar to this, but much cleaner & nicer looking. It was on a Black Sheep, after all.
http://farm4.static.flickr.com/3060/...140e5c.jpg?v=0

ok thats what I thought. thanks a bunch.

check out the Ibis Tranny

Holy sh*t! An adjustable chainstay...

That seems like an absolutely terrible idea. Like seriously one of the worst concepts one could conceive of.

<a href="http://www.flickr.com/photos/ryancecilsmith/3773894021/" title="IMG_1172 by Big Comic Spirits, on Flickr"><img src="http://farm3.static.flickr.com/2423/3773894021_24be5641d1_b.jpg" width="1024" height="768" alt="IMG_1172" /></a>

This is a tensioner, which adjusts the chain, behind the horizontal dropouts. Is this what the guy means, perhaps?

He probably means the bike has sliding drops.

http://cdn.mos.bikeradar.com/images/...hxe-798-75.jpg

EDIT: I just looked at the ad and it looks like that frame has verticals. The chain is pretty slack so I'm wagering there's nothing there for tensioning unless he's using an eccentric bottom bracket.

Titanium bike with belt drive!
What make/model is this?

Bfssfg member and all around winner @ life lyledriver helped make a bike with adjustable stays.

Blog post: http://projekto-b.blogspot.com/2009/...xperience.html

http://farm4.static.flickr.com/3420/...d355851d_b.jpg

Prototype Naked turnbuckle chain stays, so you can run a disc brake without sliding tabs.

Here they are built up

http://farm3.static.flickr.com/2459/...ffa62ace_b.jpg

Here is the semi-complete bike, getting ready for interbike.
http://farm3.static.flickr.com/2617/...87b9830f_b.jpg

damn, this thread is now awesome. I rescind my previous comment.

HOLY ****! ADJUSTABLE CHAINSTAYS!!!


That bike is sweet.

would be even better if it had raised chainstays, no need for that joint in the frame.

That bike ****ing rocks

Thank you for this - I admit I have never seen an adjustable chainstay before in my life. And I can see a couple of advantages it has, even compared to eccentric BBs (which, IMHO, are the best way to tension a chain - or were, until I saw this adjustable chainstay).

Do you have a pic of that Black Sheep bike? By the way, I am looking at their other models, and must say, Black Sheep really has some fresh ideas. At last!!!!!!

I don't know if I'd trust that little 1/8" bolt to handle the forces a chainstay is subjected to.

The two allen bolts on the bigger part of the stay look like they might be a seat post clamp sort of deal.

I agree. And we know that seat post clamps with only a single bolt support quite a heavy rider at times, without any problems. I submit to you that a single chainstay is subjected to compressive stresses of comparable or even less intensity.