Used these rim strips for non-Tubeless ready wheels and tyres on a 29er (internal rim width 17mm, external 20mm.) These rim strips sit flush on the internal rim surface and create a Tubeless-ready profile thereby allowing perfect tyre: rim bead-fit. I would rate these and BOTS service 5/5. The only disappointment was I used some Vittoria Barzo (tubeless) tyres and one was defective which delayed and complicated the conversion. Steps: 0) watch a lot of YT videos :-) 1) clean the rim 2) use rim tape or gorilla tape and 3) install rim strips 4) finally install tyres and add sealant! You are good to go!