This would also change the BB height, and ST angle. Example: I spent a few mins with autocad a couple years ago and found that a frame with normal geometry, (21” TT, 13.75” CS, 74.5 HT, 11.8” BB) changing the tire in the back from a 1.95 to a 2.1 changes the head tube angle a ½ degree. Sounds like an ok idea at first but when you really look into it you’ll realize how much that will change the geometry of your bike. The dropouts are “semi vertical” meaning that you put your wheel on, sit on it until the chain tightens, then tighten your axel nuts. Vertical dropouts for single speed frames are not a new idea, just a bad one. Otherwise, I'm as curious as anyone to see how they work out. Someone's had to have thought of this before, right? The only real drawbacks I can think of off the top of my head are a) you can't run really weird gear ratios, and b) you'll probably have to replace your chain more often, because if it stretches, you're fucked. They've even been used in BMX before (I can't remember who it was, but a company used Campy road dropouts way back in the '70s). Vertical dropouts have been around for an awfully long time now. Yet, as always, whenever there's a change that seems too obvious, I wonder why it's never been done before. The reasons given for the change are solid-your wheel can't move up (or back) in the dropout, and you can run your chain as tight as you can get it and still get the wheel out. So apparently Nate Moroshan has started his own bike company (featuring basically everyone who used to ride for Volume up until recently), and designed his own frame, which has one major difference from your typical BMX frame: Vertical dropouts.
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