Modern Track Frames

How do people feel about Dolan Seta's?

See a few of them at Glasgow. I don't think they are tremendously stiff or aero (in terms of mid priced carbon track frames) so there are other, more popular options.

In terms of suitability for racing, if it’s got the 11” bb height, track ends and no braze ons then it’s suitable to race on.

Of course there are parameters for things like saddle setback and handlebar extension(infront of the front hub) but it's pretty much seatpost and stem changes to set a bike up to fall within or outwith those parameters.

If you get into pursuiting then there's a whole stack of rules about aero bars that could fill a thread of their own.

There’s also rules about shapes of tubes and stuff but you’d be lucky if the comms at even national championship level were looking out for that and unlike with time trials and triathlons there’s not really the opportunity for people to compete on the track outwith the reign of the uci (national governing bodies tend, I think, to just defer to uci regs) so there’s no market for mad aero non uci compliant track frames.

TLDR, it shouldn't be difficult for you to tell the 'track' bikes apart from the 'fixies'. Buy something that is being marketed as a 'track' bike and it's unlikely you'll need to worry about how appropriate it is for quite a while.

I’d say if you want to avoid buying something inappropriate then stop looking at the ‘boutique’ frames like Engine11 and Standert and start looking at the frames that are getting ridden and raced on velodromes across the country on weekly basis (Dolan, PX, Look, Cervelo, Felt, Moda etc that have already been mentioned).