SE Bikes One Piece Alloy Chainring and SpiderThe SE Bikes One Piece Alloy Chainring and Spider has 39T and uses a One-piece style chainring with a spider. The black chainring has CNC machined silver teeth, an anodized spider, and ED gold bolts. Compatible with 1pc cranks and 1/2" x 1/8" chains. Available in Black and Black/Silver.