for example:

Made of durable nylon - Provides long durability and protects the chain from external influences

Crank pin bearing radial running clearance is optimized to ensure maximum performance

0 REAR_PROET_TYPE: 269 REAR_PROET_SSION: Standard

0 Tire_stia: mt 60 Rs tiRi tiRi tire Tubeless_or_tuBette: tl - tubeless

S&S CYCLE FLYWHEEL 4.625 FUL WP WG 320-0605 High-Performance Piston Kit with Gaskets for 4-Stroke for example:Made of High Strength Forced Steel and Designed for Stock and High Performance Custom Applications, Special Keyed 6 Large Diameter Tapered Sprock Shaft That Provides More Contact Area for Increased Strength, Machined with Timing Sensor, Computer Compatiation Compatie Pinion Shaft Are Used For Ease Os Service, Balanced to Stock HD 80 "Pistons, Includes Flywheel, Crankpin and Connecting Rods, Made in the U. S. A.