TIREGARD Wireless Tire Pressure Monitor

• hese 1/3 of an ounce sensors replace the screw on stem cap, requiring no tire re-balancing.
• patented anti-theft lock prevents the sensors from being accidentally lost.
• These enhanced sensors offer faster and better transmitting time on pressure and temperature changes, while providing continuous transmitting when in motion.

They don't tell you before purchase that you must replace valve stems to short steel ones to avoid hitting calipers. There is a warning when you open package. Other brands include stems.
Before you buy remember on Harley and maybe some other motorcycles you will need to do this, which adds to the cost because of dismantling wheels and tires. Recommend coordinating with tire replacement and may consider internal sensors next time. If I purchase tpms for a motorcycle again it won't be this one.

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