Lezyne Power Pack XL Rechargeable Power Pack CheckoutSpec= Lock Out 4 }SRAM RED Flattop Chain -

}SRAM RED Flattop Chain - 12-Speed 120 Links Flattop PowerLock Rainbow D1

1" Casing Performance TPI 67 Compound Addix Bead Non-folding Type Non-tubeless Color Black Weight 645g E-bike E25

The number and letter refer to the mm offset and direction from the mounting face to the centerline of the teeth:

Vendor Dt swiss Manufacture Number SCOS20298S0100 Model Name Competition Straight Pull Category Spokes

Lezyne Power Pack XL Rechargeable Power Pack CheckoutSpec= Lock Out 4 }SRAM RED Flattop Chain -IPX7 rated external power supply improves the operating time of compatible LEDs Powerful 13,200 mAh, 49 WHR battery Extra long cable (985 mm 39 in) Compatible with iPhone 15, Samsung, etc., and other USB C devices (older iPhones require a USB C to Lightning adapter) USB C PD compliant, 5V 3A, 9V, and 12V Secures firmly to the frame with an adjustable Velcro strap TECH SPECS Misc Rechargeable Power Pack