Forward components HT2 eccentric bottombracket kit.
Lets you turn your ht2 bottom bracket into an eccentric one, thereby letting vertical dropout frames be run minus a tensioner (may need a half link though).
I have had it on my bike for about 6 months. Only removed it because that bike has now morphed into a 1 x 9 commuter.
Similar in function to the Trickstuff Excentriker but cheaper.
Here's their website;
http://www.forwardcycle.com/products.html
and here's a pic of the one i'm selling
http://www.flickr.com/photos/65116677@N02/
Dead simple to fit, just put the cups in the frame, then put the eccentric cups in, rotate rh cup until tension is right, then left cup until axle is straight.
Just check on website if your cranks are compatible.
£55 posted.
