Helix R e*spec Chainrings merge cutting-edge design and performance. Designed as an upgrade for the most popular e-bike motor systems, this 1-piece direct mount chainring is forged and machined from 7075 AL. Boasting lightweight, durability, impressive stiffness, and a standout technical aesthetic, they're available for Bosch CX Gen4/Gen5, Bosch SX, TQ HPR50, Fazua Ride 60, Shimano EP8, Avinox, as well as Specialized SL1.1 and 2.1/2.2 motors. With a long-wearing tooth profile and refined aesthetic, the integrated look, when paired with Helix Race Alloy e*spec cranks, is the ultimate upgrade to your e-bike. The new M4 narrow-wide profile delivers enhanced chain retention and cross-compatibility with Shimano(R), Sram(R), and TRP(R) 11/12s drivetrain, including SRAM(R) T-Type(R). It's available in a variety of Specialized(R) colors for coordination with e*thirteen cranks, cassettes, stems, tubeless valves, and more. Bosch rings are offered in two offset options: - 13mm for 53mm chainline on CX Gen4/SX and 55mm chainline on CX Gen5 bikes - 15mm offset for 55mm chainline on CX Gen4/SX, and 57mm chainline on CX Gen5