How do I measure my fork tubes to know what length I need?

Stock length is measured from the very top of the fork tube down to the center of the axle hole on the lower leg (slider). When you see tubes listed as "+2", "+4", etc., that measurement is in addition to the stock length for your specific model.

If I install extended fork tubes, what else will I need to change?

Going longer almost always requires more than just tubes. You will likely need a longer front brake line, and potentially longer throttle and clutch cables. Depending on how much you extend the front end, you may also need a new, longer kickstand to ensure the bike leans at a safe angle when parked.

What's the difference between 39mm and 41mm fork tubes?

This measurement refers to the outside diameter of the fork tube. 39mm is the stock size for most Harley-Davidson Sportster and Dyna models, while 41mm is the standard for larger bikes like Softails, FLs, and Touring models. The two sizes are not interchangeable as they require matching triple trees and lower legs.

Motorcycle Fork Tubes

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Upgrade Your Stance: Custom Motorcycle Fork Tubes The motorcycle forks are the foundation of your front end, defining your bike's profile and handling. Whether you're rebuilding a stock front end or creating a radical chopper, a high-quality set o...

Upgrade Your Stance: Custom Motorcycle Fork Tubes

The motorcycle forks are the foundation of your front end, defining your bike's profile and handling. Whether you're rebuilding a stock front end or creating a radical chopper, a high-quality set of fork tubes is essential. At Lowbrow Customs, we offer a massive selection of precision-made motorcycle fork tubes to help you achieve the perfect stance and a smooth ride.

Choosing the Right Fork Tubes for Your Build

Selecting the right fork tubes is about getting the correct fitment and the desired length for your project. Here’s what to consider:

Know Your Diameter: The first step is identifying the correct diameter for your triple trees. We stock the most common sizes for Harleys, including 39mm fork tubes for Sportsters and Dynas, and heavy-duty 41mm fork tubes for Big Twin models like Softails and FLs.
Achieve the Chopper Look: To get that classic long front end, you'll need extended fork tubes. We offer a wide range of sizes over stock, from a subtle +2 inches to a wild +12 inches or more, giving you the key component for building your perfect custom motorcycle forks.
A Full Front-End Overhaul: Replacing your Harley fork tubes is the perfect opportunity to service your entire front end. It's an ideal time to inspect and upgrade your motorcycle brakes for improved stopping power to match your new setup.
Balance Your Bike: Changing the front ride height will affect your bike's overall geometry. Consider upgrading your rear suspension with a new set of motorcycle shocks to complement the changes up front and dial in your ride. A longer front end may also require adjustments to your front fender mounting.

Why Choose Lowbrow Custom for Your Fork Tubes?

We are obsessed with the details that make a great custom motorcycle, and high-quality fork tubes are a critical part of that.

Builder-Focused Selection: We offer a huge range of lengths and diameters because we know that one size does not fit all in the custom world. You'll find the exact sportster fork tubes or extended chopper tubes you need right here.
Uncompromising Quality: Our fork tubes are manufactured from high-quality steel, precision-ground to size, and finished with a flawless hard chrome plating for a long-lasting, smooth-as-glass surface.

When you choose Lowbrow Customs, you're not just buying parts; you're joining a community of builders. We're committed to backing you up with:

Free Shipping on all US orders over $99.
90-Day Hassle-Free Returns because we stand by what we sell.
Real-Deal Tech Support from our experienced team, ready to offer expert advice for your projects.

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Motorcycle Fork Tubes FAQ

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