As posted earlier, my experience of TL-ing a 300L in 2023 was that there were no MT type 21-inch rims narrower than 2.15. I think a secure seating at lowered psi has always been a problem with narrow 21s.
I see the Haan www says:
"The tubeless process is not applicable for all rims (for example 21 x 1.85 front rim). Rims also need to be prepared with a safety hump [MT] to keep the tyre on it’s place."
But you say that may have changed?
Can't do anything but good converting your CRF to TL, especially if riding alone in remote spots. If you don't fancy DIY (like I just did to a TW), is there no one in Ozzie who does a similar pro-sealing job on a supplied Excel MT rim built on your hub/s? Would be loads cheaper, even if Haan distribute in Au.
Tubeless Conversion Index Page
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