I had a really good look at exo3 in a variety of the build options a few weeks ago at the PX warehouse. A couple things stood out:
- The transition between the front end and main frame is pretty sloppy. There is a noticeable width difference between the fairing which extends from the brake and the main frame. Similarly the brake fairing does not seamlessly morph into the fork. There is actually a external bolt which attached the fairing to the frame and the bold head is left sticking out in the wind (see http://d2plslj6xljffa.cloudfront.net/imgs/products/px/950_constW/294947_P2.jpg ). The same situation extends to the back of the bike where they main portion of the brake is hidden but there ar still a couple of bolts left sticking out. Overall I’m not convinced the front end is any more aero than a traditional set-up.
- PX currently only offers 1 stem option for the bike. Keeping in mind their is only one option in terms of extension shape, the bar has almost no room for adjustability outside of extension raisers, and the way the brake fairing was designed limits the use of other bars this might be a fit problem. The seat-post presents a similar potential conundrum. The seat clamp has a single set position so the only adjust-ability is in the saddle rails. Probably works for most but certainly will not work for all.
- The rear disc is an odd looking shape relative to all other discs I have seen. The surface of the disc is totally flat but then the brake track forms a big ridge noticeably raised from the rest of the disc surface. All other details about the disc like what the hub is were unknown, even by all the PX staff. I wouldn’t be surprised if in many case an aero cover would be jut as fast if not faster. As for the front wheel its got a massive side profile so you would need another for when winds pick up.
Does this mean the bike is bad? I don’t think so, but it isn’t the absolute bargain it might at first appear. You really need to try and figure out if the bike will fit you before you can assess its values as you will be quiet limited in terms of after-market adjustments to adapt the bike to you.