The Surly Modular Dropout System, or MDS if you’re into the whole brevity thing, gives you the choice between horizontal, standard vertical or a 12x142 thru-axle. Framesets ship with all three chips while the complete bike will only come with the direct-mount Shimano thru-axle option. We’ve also strayed from our usual finish option of solid powder coat colors and have instead opted for a translucent powder coat. This finish is far cooler because it gives you a window into the “soul” of the frame. Yes, you can see right down to the metal- and that’s pretty Metal. If you guessed that we took what was already a versatile and capable 29” trail bike and made it even more versatile and more capable, then you’d be exactly correct. Good work, smart guy.