PBI Sprockets

PBI Sprockets: Decades of American-Made Precision

PBI Sprockets has been synonymous with quality chain-drive components since the mid-1970s. As a division of Chris Products Inc., PBI has spent decades earning the trust of Harley-Davidson riders, builders, and racers alike — delivering sprockets engineered to outperform OEM parts in both durability and fit.

What Sets PBI Sprockets Apart

The foundation of PBI's reputation rests on meticulous material selection and manufacturing. Front and mainshaft sprockets are CNC-machined from solid high-grade 8620 alloy (chromoly) steel, then heat-treated for long-term wear resistance. Each piece is finished with an electroless nickel plating process — a method that deposits a perfectly uniform layer regardless of the sprocket's geometry — delivering superior corrosion protection and enhanced lubricity right out of the box.

Equally important is how PBI cuts the spline bores on their mainshaft sprockets. The broaching process is specially calibrated for maximum spline-to-shaft contact, which translates directly into optimized load bearing — a detail that matters enormously under the sustained torque of a big-twin engine.

Mainshaft & Transmission Sprockets

PBI's mainshaft sprocket lineup covers an impressively broad range of Harley-Davidson applications, from classic 4-speed Big Twins dating back to 1936 all the way through modern 6-speed Dyna and Softail models. Offset countershaft sprockets — available in configurations from 0.500" to 1.310" of offset — make PBI a go-to choice for belt-to-chain conversion builds and custom drivetrains where precise chain alignment is critical. Multiple tooth counts across each series let riders fine-tune their final drive ratio to suit their riding style.

Aluminum Rear Sprockets

On the rear wheel side, PBI machines their sprockets from 7075-T6 aircraft-quality aluminum — a material that surpasses common steel in tensile, yield, and shear strength while dramatically reducing unsprung weight. This makes PBI aluminum rear sprockets especially popular with sport-oriented riders looking for a performance edge, particularly in 520-chain conversion setups where reduced rolling resistance is part of the goal.

Made in the USA, Built for the Long Haul

Every PBI sprocket is manufactured in the United States using computer-controlled lathes, and the entire line is engineered to meet or exceed OEM specifications. Whether you are doing a straightforward transmission sprocket swap on a Sportster, converting a Big Twin to chain drive, or building a custom motorcycle from the ground up, PBI offers the precision fitment, material quality, and decades of proven performance that serious riders demand.