Threaded size of the cup is 15/16inch*24. Bearings and cups for one-piece crank. Measure the diameter of bottom bracket shell before shoping, if it is exactly 2", then bottom bracket bearings set should fit. For one-piece crank ,Material: steel. Fits on most bikes such as beach cruiser, lowrider,chopper bike frames. 2" Cup Bottom Bracket Set,One-Piece Bottom Bracket Cup Set Bearings Included,Silver.

Frame Material: Aluminum. Color: Silver. Brand: DONSP1986. Date First Available: June 1, 2017. Best Sellers Rank: #77,311 in Sports & Outdoors. Customer Reviews: 4.5 out of 5 stars 50 ratings 4.5 out of 5 stars. : B07PLX5QX6. Part Number: ?Dolphin-31. Manufacturer: ?DONSP1986. Material: ?Alloy Steel. Color: ?Silver. Brand Name: ?DONSP1986. Package Weight: ?0.32 Kilograms. Item Package Dimensions L x W x H: ?4.37 x 3.82 x 2.44 inches.