Profile Imperial sprockets are CNC machined from 6061 Aluminum made in the USA. The Imperial is “bolt on” style and requires a sprocket bolt to be attached to crank arm. All Profile chainwheels have a .875" spindle hole with adapter to fit 0.75" spindles - they do not fit 1 or 2-piece cranks. 3/32” teeth for 3/32” and 1/8” chains. Color: Black. Material: Aluminum. Defined Color: Black. Bore: 19mm. Interface: Bolt Drive. Adaptor: None. Tooth Count: 23. Chain Width: 3/32".
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