Are the rims on my Cube LTD SL tubeless ready?
I have new tyres that are so i’m just wondering about the rims!

Cube LTD SL Red

Nope. You’ll need a rim strip.

DT CSW MA 1.9 wheels with 28/32 spokes and fitted with a Schwalbe Rocket Ron and Racing Ralph tyre combination suggests it’s ideally suited to the current dry conditions, but with enough bite for damper trails. The rium is a rebadged DT Swiss XM490 with a claimed weight of 500g. According to DT they can be be converted to tubeless with their own tubeless kit, comprising rim tape and valve.

According to the above they are tubeless convertible using the dt swiss tubeless kit here, or you could attempt a cheap conversion using gorilla tape and generic tubeless valves

Most dt rims will convert with tape and sealant. Be warned though that getting the tyres inflated first time without a compressor can be a pain. I’d advise 3 wraps of tape to build up the bed a little otherwise you’ll be there all day trying to get the tyre up, even with a compressor.