Oko was born in the United Kingdom in 1978 with the aim of creating the highest quality products that would allow the biker to keep his wheels safe and, consequently, his MTB outing. Oko produces sealants and inner tubes for MTB tires, manufactured with innovative and high quality products that offer great performance to lovers of two wheels. → OKO & PRO-M STORE ← We at Pro-M Store, as an authorized distributor, have some of the best Oko products, such as the Magic Milk sealing liquid, perfect for sealing Tubeless Ready tires. Its composition allows the liquid to extend over the whole tire and the rim and this makes it suitable for general use and to be combined with the PTN. Other fantastic sealants are X-Treme and Puncture Free, both made with an innovative formula based on water and a particular granulate capable of clogging holes or cuts up to 4 mm for Puncture Free and up to 7 mm for the X-Treme. We also have 27.5 and 29 inner tubes made of butyl and containing OKO Puncture Free sealant.