Over the past fifteen years, tubeless tyre systems have evolved to the point where they’re pretty trouble-free. With tyre casings and beads now optimised for sealant use and rims optimised for those tires, aside from a handful of tough-to-mount combinations there’s little left to go wrong.
That is, until that sealant that’s been keeping the entire system working goes dry and leaves you stranded.
Just such an experience is what prompted the development of milKit’s tubeless valve cores. While we all could unseat our tyres from the rim periodically to check sealant health, it’s messy and unpleasant and raining outside and cold in the shed and… we rarely do. milKit’s solution, while it does require some work, looks to be a whole lot simpler.
Centred around a dedicated valve, the milKit have added a second one-way valve at the inside of the tyre and a modified valve core that keeps that valve open in normal use. These, combined with a syringe and hose, allow the valve cores to be removed and sealant to be drawn out and measured. If it comes back low (or empty), simply add your sealant of choice to the syringe and inject through the core. All without deflating the tyre or needing to re-seat the bead.
Granted, this could easily be filed (alongside tubeless tyres themselves) under “First World Problems,” but given how many of our flats are entirely preventable, if milKit brings checking sealant below the hassle threshold it may well prove worthwhile. A bike’s worth of milKit (two valves, hose, shut-off valve, and core remover) fit happily within the custom-made syringe, which should make it easy to toss in the ‘go’ box for weekends away. milKit is available through shops or amazon.co.uk for £44.