Effetto caffelatex rim strips mediumunlike its butyl predecessors as used by may other brands the caffelatex rim strip is very light puncture proof and transparent it allows the tubeless conversion of most standard mountain bike wheels using tubeless or tubeless ready tyres and cafflatex sealant size m 30mm is for rims with external section between 25 and 29mm features lightweight 30g for a strip makes it competitive with tubeless tape with a weight ranging between 9 and 20g per