Quick, easy straps for your Flare and Ion lights Original equipment replacement part. Genuine replacement parts When it's time to refresh your trusty light, Trek Genuine Replacement Parts have you covered. - Fits all Flare rear lights Fits all Flare tail lights - Works best with 27.2 - 31.6 mm seatposts Works best with 27.2 - 31.6mm seatposts - Includes a 16-degree offset for optimised use on seatposts Includes 16 degree offset for optimized use on seatposts