Bookman Visibility Block Safety Light Front -4 5 mm rotor thickness is

5 mm rotor thickness is only compatible with Magura Gustav brake calipers

Dust & water resistance rated to IP54 standard

5 Gross Payload (Lbs) 440 Mfg Size One Size Assist Speed (Mph) 28 Walk Assist Yes Platform Boost E Wheel Size 24" Designed for ebike Yes Defined Color Gray

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Bookman Visibility Block Safety Light Front -4 5 mm rotor thickness isStrong, compact, versatile and rechargeable bicycle light Equipped with LEDs and a lithium ION battery to make it super bright, yet long lasting in battery time Perfect for the commuter or the dedicated road cyclist that are looking for a slim light to illuminate twilight rides Charges via USB C (cable not included) Model Block Front Lumens 50 Modes 4 Rechargeable Yes Color Black Weight