Serfas USM-1000 E-Lume 1000 Headlight Bike Accessories_Crankset our innovative clutch knob ensures

our innovative clutch knob ensures perfect tire-to roller connection for every single ride

With the Shimano Deore/Acera drivetrain

and gloss finish

durable and heat-dissipating CNC machined aluminum construction

Serfas USM-1000 E-Lume 1000 Headlight Bike Accessories_Crankset our innovative clutch knob ensuresThe All New 2021 Serfas E Lume Series Headlight New for 2021 our E Lume Series Headlights feature a redesigned extruded aluminum housing, new optical lens with excellent side visibility, and improved battery capacity and LED performance. We made not only increased performance a priority but also improved rider visibility, so we designed an all new optical lens and housing with front corner cutouts to allow drastically more light be visible when viewed