I'm running 26 x 2.1 Panaracer FireXCPro TLR tires on 20-year-old non-tubeless Mavic rims. The rims were wrapped with a layer of electrical tape and a layer of tubeless tape. Even after they go flat from non-use, I can get them to re-seat and inflate without an issue, using just a floor pump.
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RIP 01/08/25...2022 Trek Supercaliber, 2018 Storck Fascenario.3 Platinum, 2018 Trek Procaliber SL Singlespeed, 2017 Bear BR1, 2003 Time VX Special Pro, 2001 Colnago VIP, 1999 Trek 9900 singlespeed, 1977 Nishiki ONP