STRONGLIGHT chain ring mod.19 for 1-speed, aluminium 7075 T6, anodized self-service package,100% CNC treated, Direct Mount, full design, incl. necessary aluminium washer, compatible with Bosch System Gen.3, 165g (incl. washer) 38 teeth, compatible with Hebie Chainglider.Specifications: - Attachment: Direct mount teeth- Teeth: 38 teeth- Rear gears: 1-speed, E-drive teeth- Material: Aluminium - Weight: 0,128 kg