Mountain Bike Frame
Here is a mountain bike frame built from Reynolds 631 for a bit of abuse on the trail. It has adjustable Rocker dropouts, with exchangeable inserts so could be build up as a single speed, with gears, or with a Rohloff. I love the orange color! Goes great with the bronze head badge up front.
For more Big Forest Frameworks mountain bike frames check the link here: http://bigforestframeworks.com/category/mountain-bike/