PRODUCT EVALUATION: Boots for the brave 

By the staff of Dirt Wheels

Leatt designed the inside surfaces of the FlexLock to grip your machine’s frame and plastics.


When your handlebar is at full lock, the changing terrain is upsetting your sport quad’s suspension as you keep your thumb pinned on the throttle, and you start shifting your weight while passing through the corner’s apex.

You are building towards standing for the jump ahead. What non-quad riders don’t realize is how tough it is to keep your foot planted on the outside peg as forces fight against your ankle through the rough stuff.

There are boots that are built better than others for the taxing strain of riding fast. Leatt’s all-new $389.99 GPX 5.5 FlexLock boots are new to the market and already proving themselves tough competitors.



Leatt focuses on protection through the use of medical technology to generate impressive products. The GPX 5.5 FlexLock is claimed to reduce forces to the ankle and knee by over 30 percent in comparison to other high-end boot models.

It utilizes an adjustable system called LockOut that doesn’t allow the boot to hyperextend sideways in a direction a human ankle is not supposed to travel. This system utilizes bumpers that you can change for differing degrees of motion limitation.

The GPX has 3D-shaped impact foam over the ankles on the interior of the boot to lessen heel lift and provide a secure fit. The liner inside is breathable, while the toe box can handle wider feet.

The outside of the toe box is ergonomically designed to get around a gear shifter easily. The sole of the 5.5 is made of two different materials, or DualZone hardness, in the key locations you generally would be planted on the pegs. The steel shank inside is CE certified.

Leatt designed aluminum over-locking clasps to open and close the boot, which is paired with easily adjustable straps. The upper front layer of the boot that protects your shin is made of durable hard plastic material. While the inner final closure cuff system involves a directional, Velcro-style function they dubbed SlideLock.

This lets you easily tighten the cuff without having to unstrap it once all the clasps are latched.



Leatt stayed true to the form with these boots. They are quality made and involve a lot of technology to get the job done. The GPX needs a good break-in period before it truly feels like an extension of your leg.

The ankle support and interior fit very tightly at first. A few of our riders complained of some pressure on the ankle bones at first, but once the boots break-in, they flex and move with ease without the pressure. The closure systems are all easy to operate, even when muddy or when your arms and hands feel like falling off after a race or hard riding.

The soles of the 5.5 gave us no issues, and the boot is easy to maneuver around footpegs. After a while, like most of Leatt’s gear, the GPX wasn’t noticeable on our feet, which is a sign of comfort. We were able to quickly change the different-size LockOut parts easily and quickly, but only a few riders noticed the difference in the system.



Leatt did a great job, once again, with their new product. The GPX 5.5 FlexLock boot line is durable, comfortable, and easy to get in and out of. We feel that they priced this boot quite well, and it comes in three color options: black, white with black and Royal. We hope they come out with even more color options in the future. Go to www.leatt.com or call (800) 691-3314 to get more info on their new boot or many other products in their line!

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