Hello everyone!
I'm new here and this is my first post on this forum. I just bought this Cannondale frame off of ebay for a build. I'm having some trouble identifying it; so I thought I'd post it here and see what you experts can tell me.

Serial # 137261RK06811
Model # 5FMN4L
Barcode: R137564

The only thing i'm relatively sure about it that its a 2006 year model and that it is either a hybrid or mountain bike.

Any help would be greatly appreciated.