Profile Racing
Black Adaptor 0.875" to 0.75"/19mm, for Thick Sprockets
Chainwheel Adaptor
.875/22mm to .75/19mm
AKA Sprocket Spacer, Spider Adapter, Hat Washer. These make your sprocket fit your BB spindle properly. These go on the back side of the sprocket, and are made of steel. These are not actually needed for Profile Chainring Spiders, which fit flush on a 19mm BB spindle.
Black--.875" to 19mm--For 6mm and thicker chainwheels
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