Road Wheels & Road Wheel Recommendations?

what are rims on r23 and 24's?

R23 wheels seem to use the R460 sleeve-jointed rim, R24 wheels have their own pin-jointed rim. For MY2016 (i.e. in some shops now) there is also the R32 wheelset which mates the RR511 welded-joint rim to the hubs from the R23 wheels.

It's worth checking which model year you're getting if you order DT R23/24 as they have started shipping with tubeless tape and valves for MY2016, so although the old stock might seem like a bargain, it might not be if you're going to be spending another €40 on the tubeless kit.