What is preload on a dirt bike?

Preload. This refers to how compressed the spring is when it’s at rest. In other words, preload is how much tension is always on the spring. More preload results in harsher suspension because the spring constantly wants to expand. Naturally, less preload makes for a softer ride.

What does adjusting the preload do?

Preload is used to adjust the shock or spring to the correct range of operation within the suspension’s travel-more preload will raise the bike up on its suspension, keeping you near the top of its travel. With less preload, the bike sits lower and closer to the bottom of its suspension travel.

What is preload on dirt bike forks?

Preload is simply the amount the springs are compressed while the suspension is fully extended. A typical pair of sports bike fork springs are about 8.5-9.5N/mm. For them to exert enough force to hold up the front of said sports bike and rider, they need to be compressed 50-55mm, but we only want, say, 35mm of sag.

What does preload setting mean?

It’s simply the initial compression of the internal spring in the fork. The more it’s compressed, the stiffer the fork will feel. Bigger preload compresses the spring more, and so it’s best for heavier riders and/or people who need/prefer the stiffer ride (racers etc.)

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Does preload affect ride height motorcycle?

Adjusting preload simply determines the motorcycle’s ride height. … Basically, when ride height is overly high there is too little sag. The bike rides near the top of its suspension travel, it’s stiff, uncomfortable, and if you’re vertically challenged you may have trouble reaching the ground.

Does preload affect ride quality?

The myth: Preload affects spring rates and handling characteristics. Why it’s wrong: The short answer is that preload won’t make a spring any stiffer, and it won’t make it any softer, but all you want to know is why you’ve been told the opposite.

How do you set preload on a motorcycle?

1 Setting the spring preload or “sag”

Check swing arm and wheel bearings/bushes to ensure there is no wear. Lift the rear of the bike until the suspension is completely extended. Take a measurement from the axle to a point directly above on the rear sub frame. Let the bike down on its suspension and measure again.

How much preload do I need?

How Much Preload Should I Have? For most applications 1″ of preload in the front, and 2″ of preload in the rear is a good starting point. If you’re purchasing springs from us we also check other factors to make sure you have the ideal spring rate.

How does preload affect sag?

Adjusting the preload affects what is called the “preload force”, which is the initial force that the springs exert on the shock—this is what affects the sag. By tightening the adjusting collar or external preload adjuster on the shock you will increase the preload force, which will decrease the sag and vice versa.

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What is bike shock preload?

The preload refers to the amount of sag the shock will allow when the bike is at rest with the rider’s weight bearing down on it. Determining the correct preload is important because if it’s too high, it takes more energy to move the shock and compress the springs, resulting in a harder and desensitized shock system.

Will increasing preload increase ride height?

If you preload the spring you are “stiffening” the spring by the amount you compress (preload) it. It will effect ride hight, but only because you are taking out sag. Preload is really for setting your sag, not ride hight.

What is fork spring preload?

“Preload” (or “preload length”) is the distance the spring is compressed from its free length as it’s installed with the suspension fully extended. … The “preload force” is the initial force the spring exerts on the end of the fork tube with the fork fully extended.