E*Thirteen Helix Race E*Spec Bosch SX/Gen4 Chainring Cutting-Edge Design With today's 1x drivetrains and e-MTBs, a strong chainring is more important than ever. The E*Thirteen Helix Race E*Spec Bosch SX/Gen4 Chainring merges cutting-edge design and performance. Designed for Bosch SX/Gen4 equipped e-bikes, this 1-piece direct mount chainring is forged from 7075 AL for lightweight durability, impressive stiffness, and a standout technical aesthetic. The M4 narrow-wide profile delivers enhanced chain retention and cross-compatibility with Shimano, SRAM, and TRP 11/12-speed drivetrains, including SRAM T-Type. Features Designed for Specialized Turbo Levo equipped e-bikes Material: 7075 Aluminum Compatible with Shimano, SRAM, and TRP 11/12-speed drivetrains, including SRAM T-Type SPECIFICATIONSDrive Train Speed11/12-Speed Tooth Count32, 34TMaterial7075 Aluminum Direct Mount Type-Chainline-Offset15mm Offset Intended Use E-MTBWeight N/AChainline/Chainring Offset Guidelines Rear Spacing135mm / 142mm148mm Boost Super Boost 150mm / 157mm Fat Bike (170mm, 190mm, 200mm)Chainline48 - 50mm51 - 53mm54 - 56mm56mm+Chainring Offset~6mm~3mm~0mm~+2mm | E. thirteen | Helix Race E*spec Bosch Sx / Gen 4 Chain Ring 32T Dm Silv 15Mm Offset | Aluminum