Includes everything you need to set your Zulu Three, Zulu Four or Zulu Five up tubeless. Includes 4oz bottle of tubeless tire sealant 2 x tubeless tire valves Features Removeable valve core. Compatible only with Zulu Three, Zulu Four and Zulu Five models with tubeless-ready tires and rims. Some early model versions may not be compatible. If you are unsure if your Prevelo bike is tubeless compatible, please contact us . For guidance on setting your bike up tubeless, see instructions here .