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Do you have a Lezyne light and sweet giant handlebars? Then you've got a problem! 35mm handlebars won't work with any Lezyne clamp. Swap this little bit of plastic in, use the original light shoe and original thumb screw, and get yer night time party on! (It even says BIKERS DO IT IN THE DARK in case you forget how much fun bikes are at night).
I've been using this one on my fat bike for about 2 years now, and also have one for my XC bike I've used in 18 hour races with no issues.
Please check the diameter of the round boss that holds your light. This fits the models that use a 12 mm boss. Please see photo for reference. The 12mm boss seems to primarily be shipping with larger MEGA and DECA lights. If you use the 10mm boss version, please check out my mount for that variation.