Exercise Bike Bottom Bracket Replacement Kit, Static Bike Bearing And Locknut Set, Steel Construction, Silver Finish, Includes Cup, Gaskets, Inner And Outer(Internal Lock)

• [FULL BOTTOM BRACKET KIT] This kit contains a bottom bracket cup, one steel ball bearing (5 x 3.1 x 0.9 cm), inner locknut, outer locknut, one standard gasket, one locking gasket B, one screwed gasket C and a set of spacers to restore your exercise bike's drivetrain.
• [PRECISION BALL BEARING] Bearing features 8 cm (5/16 inch) balls, 3.1 cm inner diameter and 0.9 cm thickness for consistent rotation and reduced friction, helping your trainer feel smoother during steady or high-intensity .
• [ADJUSTABLE SEAL OPTIONS] Three gasket styles offer flexible sealing choices for different bottom bracket designs and threading arrangements, enabling a snug fit to keep contaminants out and minimize lateral movement.
• [STABLE STEEL HARDWARE] Inner locknut (OD5cm ID2.3cm) and outer locknut (OD4.5cm ID2.1cm) plus a sturdy steel cup (OD5.5cm, large ID5.0cm, small .0cm, t1.6cm) provide reliable clamping and a silver finish suited for regular indoor use.

Features: *Replacement Accessories: There are a bottom bracket cap, ball bearing, inner locknut, outer locknut, and various spacers for a exercise bike bottom bracket replacement solution. *3 Types of Gaskets: Gasket A is outer diameter 4.05cm, inner diameter 2.45cm and thickness 0.3cm. Locking Gasket B is outer diameter 3.4cm, inner diameter 2.2cm and thickness 0.3cm. Screwed Gasket C is length 3.2cm, inner diameter 2.1cm and thickness 0.4cm. *Ball Bearing: The ball bearing measures 4.5cm in outer diameter, 3.1cm in inner diameter, and 0.9cm in thickness, with a ball diameter of 0.8cm (5/16inch), keeping smooth and efficient rotation. *2 Types of Locknuts: The inner locknut is outer diameter 4.5cm and inner diameter 2.3cm. The outer locknut is outer diameter 4.5cm and inner diameter 2.1cm. *Bottom Bracket Cap: The bottom bracket cap has dimensions of 5.5cm outer diameter, 5.0cm large inner diameter, 4.0cm small inner diameter, and a thickness of 1.6cm. Specifications: Part Name:Exercise Bike Bottom Bracket Cup and Bearing Accessories Material:Steel Size: 4.5*3.1*0.9cm(ball bearing) Color:Silver Package Content: A Gasket: 1* gasket Ball Bearing: 1* ball bearing B Gasket: 1* locking gasket Internal Lock: 1* inner locknut External Lock: 1* outer locknut Cup: 1* bottom bracket cup C Gasket: 1* screwed gasket