Nukeproof zero mtb stemnew for 2015 the updated zero stem now comes with a 35mm option to complement the existing 50mm version when we looked at stems we wanted one that would give top performance to cope with the demands of enduro riding but also one that was light and more crucially at the right price based on the previous zero stem we have updated the shape and styling to provide the rider with optimum performance the nukeproof zero stem a zero rise zero nonsense unit designed to be bo