Suspension Forks

How to Choose the Right Mountain Bike Fork

Upgrading your front suspension is the best way to breathe new life into your mountain bike. A high-quality fork keeps your front tire glued to the trail, reduces hand and arm fatigue, and gives you the confidence to tackle steeper, rougher terrain. Here is what you need to look for when selecting a new MTB fork.

Match Your Suspension Travel

The amount of "travel" (how far the fork compresses) dictates what the fork is designed to handle. You should generally stick within 10mm to 20mm of your bike frame's original stock travel. Changing it by more than that will drastically alter your bike's geometry, potentially making it handle poorly or even risking damage to the frame.

• 100mm – 120mm (Cross-Country): Focused on being as light and efficient as possible for climbing and smooth, fast trails.
• 130mm – 150mm (Trail): The perfect do-it-all travel range, balancing climbing efficiency with descending capability for mixed terrain.
• 160mm – 180mm (Enduro): Built to absorb massive rock gardens, drops, and steep, aggressive descents without losing steering precision.
• 200mm+ (Downhill): Dual-crown forks designed strictly for gravity riding, chairlift bike parks, and the most extreme impacts.

Wheel Size and Axle Spacing

Forks are not one-size-fits-all. You must match the fork perfectly to your current front wheel.

• Wheel Size: Forks are built specifically for either 27.5-inch or 29-inch wheels. Ensure you select the correct diameter for your frame and tires.
• Axle Spacing (Boost): The vast majority of modern mountain bikes use "Boost" spacing, meaning the front through-axle is 110mm wide (15x110mm). Older bikes or entry-level models may use non-Boost spacing (15x100mm). Always double-check your front hub before buying.

Stanchion Diameter Explained

The stanchions are the upper tubes that slide into the lower legs. Thicker stanchions mean a stiffer fork, which prevents the wheel from twisting or deflecting in rough terrain, but they also add overall weight.

• 32mm – 34mm: Ideal for cross-country and light trail riding where saving weight is the top priority.
• 35mm – 36mm: The modern standard for aggressive trail and all-mountain riding.
• 38mm: Designed specifically for hard-hitting enduro riding and heavy e-bikes, offering maximum stiffness for high speeds and massive impacts.

Air vs. Coil Springs

• Air Forks: The industry standard for most riders. They are lightweight and allow you to easily adjust the stiffness using a high-pressure shock pump to match your exact body weight and riding style.
• Coil Forks: These utilize a physical metal spring inside the fork leg. While they are noticeably heavier, coil forks offer unmatched small-bump sensitivity and a perfectly consistent feel on long descents, as there are fewer air seals causing friction.