36 E-Optimized Factory forks are made specifically for the rigors of E-Bikes with a stouter chassis and longer durability due to adding material to strengthen critical areas. The design also uses tuning originally done for Enduro use, which fits the needs of the E-MTB and overall E-Bike uses.Genuine Kashima Coating on upper tubes. FIT GRIP2 Damper and FLOAT air spring. E-Bike Chassis. Lower Leg Bleeders and Bypass Channels. Floating axles for perfect alignment. Item Specifications: Axle to Crown Length, 543.6, Brake Type, Post Mount 180, Color, Shiny Black, Crown Race, 40, Defined Color, Black, Designed for ebike, Yes, External Adjustments, High Speed Compression Damping, Front Axle, 15mm Thru x 110mm, Lockout Switch, None, Maximum Tire Width, 72, Negative Spring, Air, Offset, 44, Positive.