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Challenge Grifo clincher
Research says no. Too leaky.
Lolz "If you are considering tubeless as you seek better performance and a more comfortable ride than your current vulcanized clincher, please consider the use of a handmade Open Tubular tire, which has a higher ride quality and shares many of the same benefits. Higher thread counts and flexible, natural rubber provide a tire that hugs the road, inspires cornering confidence and reduces the amount of road vibration that reaches your body. Tubeless tires typically take a traditional, bouncy, vulcanized clincher tire with less grip and reduced comfort.
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Maxxis Mud Wrestler might be worth a punt, maybe the Challenge Grifo clincher - we have some running with tubes and they look very aggressive. maybe mount the front in reverse for extra. Haven't tried them tubeless though so do a bit of research first if you like the look of them.