Usually there's only one choice for a threadless fork - long, maybe 300-400mm - and the installer is responsible for cutting the steerer to length. When I see numbers like 230/65 for a fork, it would be for a threaded headset, and the 65 means there's 65mm of threading at the top of a 230mm length steerer.
It's not rake. 65mm is too much rake for a normal bike. Rake is almost always between 40 and 50 mm.