Tire Valve Stem Leak This topic contains 1 reply, has 2 voices, and was last updated by DAP831 1 month, 2 weeks ago. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts September 27, 2018 at 4:04 am #2225 ruchikajayParticipant Hello Everyone, The valve stem on the front tire of my Vitpilen is leaking. How can I find out what size it is? I’ve tried searching in the manual but no luck. Thanks in advance for any help. September 27, 2018 at 3:32 pm #2227 DAP831Participant Often times those are fixed by simply tightening the valve core. Any auto parts store will have the tool you need to do it Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic.