What is the benefit of an oversized pinion gear?

An oversized pinion gear, like this 31-tooth unit, changes your motorcycle's final drive ratio. This typically results in improved acceleration from a stop and allows the engine to run at lower RPMs on the highway for a more comfortable ride.

Does this gear come with any installation hardware?

This product listing is for the 31-tooth oversized pinion gear itself. It is designed as a direct replacement for the stock gear, and you should refer to the manufacturer's installation instructions to confirm if any additional hardware is recommended or required.

Will this gear fit my specific Harley-Davidson model?

This S&S Cycle pinion gear is designed for 1999 and later Harley-Davidson Big Twin models. The fitment data includes a broad range of bikes such as the Road King, Street Glide, and various Softail models, but it's always best to verify compatibility with your exact year and model.

S&S Cycle Pinion Gear 33-4160Z - 1999+ Harley Big Twin

Name: S&S Cycle 1999+ BT 31 Tooth Pinion Oversized Gear
Brand: S&S Cycle
Price: 132.95 USD
Availability: InStock

S&S Cycle 1999+ BT 31 Tooth Pinion Oversized Gear

$132.95

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1999+ Harley Big Twin. This S&S Cycle oversized pinion gear changes your final drive ratio for improved performance.

Key Features

Fits 1999 and later Harley-Davidson Big Twin models.
Features 31 teeth, one tooth larger than stock, to alter the final drive ratio.
Designed to provide improved acceleration and lower highway RPMs.
A well-built component from S&S Cycle, a popular name in V-twin performance.
Direct fit replacement for the stock pinion gear.

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Will this fit your vehicle?

Product Details

If you're looking to change the final drive ratio on your 1999 and later Harley-Davidson Big Twin, this 31-tooth oversized pinion gear from S&S Cycle is a solid option. Swapping out the stock pinion gear can alter how your bike accelerates and cruises, giving you a different feel on the road. This gear is designed to fit a wide range of Harley-Davidson models, including popular bikes like the Road King, Street Glide, and Fat Boy.

This particular gear has 31 teeth, which is one tooth larger than the stock 30-tooth gear found on many Big Twins. A larger pinion gear generally results in a higher final drive ratio, meaning the rear wheel will turn more times for each engine revolution. This typically translates to better acceleration off the line and a more relaxed feel at highway speeds, as the engine will be running at a lower RPM for a given road speed. S&S Cycle is well-known for its engine components, and this gear is built to handle the demands of a performance V-twin.

When considering a gear change like this, it's always a good idea to consult with a mechanic or refer to your service manual to understand the full implications for your specific riding style and needs. This part is designed as a direct replacement for the stock pinion gear, making installation straightforward for those familiar with drivetrain work.