Bar fly 4 max out front handlebar mountthe 4 max out front handlebar mount from bar fly is a strong and lightweight cycle computer handlebar mount that's conveniently adjustable to ensure you get the perfect viewing angle when training or racing.versatile, durable and convenientthe bar fly 4 max is an “out front” mount made specifically for larger cycling computers. Modular system mounts your computer, di2 eps junction box, and a gopro or light mount. Compatible with 31.8mm and 35.0mm handlebars. Compatibility garmin edge series 200, 500, 510, 520, 800, 810, 820, 1000, 1030, touring watches 910xt, 920xt polar m450, m460, v650 wahoo elemnt and bolt mio 500, 505, 505hc cyclo 200, 205hc, 210, 315hc, 400, 405, 405hc, 505hc, 605hc magellan 315, 505 powertap joule cateye wireless models padrone, strada, micro, velo bryton 100, 300, 310, 330, 530, 10, one, 410 lezyne micro, micro c, mini, macro, super and superse lezyne computer head sold separatelyin the box bf4 max 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.