Can I mount a Flex Mount (SL500) light on an oversize handlebar (31,8 mm)? Mille Stech Jensen August 28, 2017 06:57 Updated Our instructions state that the lights fit handlebars of 10-30 mm, but with a bit of handyman tweaking, it is possible. Related articles SL500 Series How much light does GO emit? How far apart are the mounting holes on the basket / luggage carrier lights? Is the Reelight generators feasible with other products? Is it possible to connect two Flex Mount (RL700) rear lights to one Flex Mount (RL700) generator? Comments 0 comments Article is closed for comments.