The Muc-Off Tubeless Tag Holder offers a discreet way to install a tracker inside your tubeless bicycle tire in conjunction with Muc-Off's Tubeless Valves, meaning you can track down your bike down in the event of theft and can locate it using the Find My iPhone App. Your tracker is housed in a protective, 3-part silicone and rubber housing and held in place to Muck-Off's tubeless valve inside the tire, completely out of site. FEATURES: Optimised to fit with Muc-Off V2 All-New Tubeless Presta Valves (44-60mm). Will work with V1 Presta Valves too Sacrificial stem, ensures tracker and rim protection even after a big hit to the wheel Silicone top cover protects tracker and internal plug keeps tubeless sealant out Doesn’t block tracker signal No-rattle design holds tracker securely in place Weighs 7.5g without AirTag - 18.7g with AirTag. AirTag not included