Bar fly 4 mini out front handlebar mountthe 4 mini out front handlebar mount from bar fly is compatible with modern bike handlebar diameters and enables you to mount your cycle computer out front for easy visibility and use. Plus, it comes supplied with mounts for most garmin, polar, wahoo, mio, joule, cateye, bryton computer model mount styles.designed specifically for smaller cycle computer designsthe bar fly 4 mini is an “out front” mount made specifically for smaller cycling computers. Modular system mounts your computer, di2 eps junction box, and a gopro or light. Compatible with 31.8mm and 35.0mm handlebars.compatibility garmin edge series 200, 500, 510, 520 watches 910xt, 920xt polar m450, m460 bryton 100, 300, 310, 330, 530, 10 and one cateye lezyne micro, mirco c, mini and macro lezyne computer head sold separatelyin the box bf4 mini injection molded specialty nylon mount with hardware 7 computer heads garmin, polar, wahoo, mio, joule, cateye, bryton gopro base light mount shim for 31.8 handlebars di2 eps mountbuy bar fly accessories from chain reaction cycles, the world's largest online bike store.