Trek Rail 9.9 XTR Gen 4 Review

Trek Rail 9.9 XTR Gen 4 Review

Are you in the market for a new mountain bike and curious about the Trek Rail 9.9 XTR Gen 4?

Before making a purchase, it’s important to gather all the necessary information to ensure you’re investing in the right bike for your needs.

Mountain biking is a thrilling and adventurous sport, and having the right bike can make all the difference in your overall experience.

Trek Rail 9.9 XTR Gen 4 Review

With so many options available, it can be overwhelming to choose the perfect bike that meets all your requirements.

If you’re considering the Trek Rail 9.9 XTR Gen 4, it’s crucial to understand its features, performance, and overall value.

With this comprehensive review, we will delve into the details of this mountain bike, providing you with the necessary insights to make an informed decision.

So, let’s explore the Trek Rail 9.9 XTR Gen 4 and see if it lives up to the hype.


– Full suspension design with 150mm of travel, providing excellent control and stability on rough terrain.

– OCLV Mountain Carbon frame construction for a lightweight and durable bike that can handle the toughest trails.

– Shimano XTR drivetrain with 1×12-speed gearing for smooth and precise shifting, allowing riders to easily tackle steep climbs and fast descents.

– Powerful and responsive Shimano 4 piston hydraulic disc brakes for reliable stopping power in any weather conditions.

– RockShox ZEB Ultimate fork and RockShox Super Deluxe Ultimate RT rear shock with adjustable settings, allowing riders to fine-tune their suspension for optimal performance on different types of terrain.

– Bontrager Line Pro 30 wheels with durable and grippy Bontrager SE5 Team Issue tires, providing excellent traction and control on various surfaces.

– Bontrager Line Elite dropper seatpost for easy and quick adjustments to saddle height, allowing riders to optimize their position for climbing or descending.

– Internal cable routing for a clean and streamlined look, as well as protection against dirt and debris.


One of the standout features of the Trek Rail 9.9 XTR Gen 4 is its advanced suspension system.

Equipped with a RockShox Super Deluxe Ultimate RT shock and a RockShox ZEB Ultimate fork, this bike can handle any trail with ease.

The suspension is highly responsive and provides excellent traction, ensuring a comfortable ride even on rough terrains.

Motor and Battery

The Rail 9.9 XTR Gen 4 is powered by a Bosch Performance Line CX motor, which offers exceptional torque and acceleration.

This motor is known for its reliability and efficiency, allowing riders to conquer steep hills and challenging trails without breaking a sweat.

The bike also comes with a long-lasting Bosch PowerTube 750Wh battery that provides ample power for long rides.


Another impressive aspect of the Rail 9.9 XTR Gen 4 is its precise and reliable shifting system.

With a 1×12 Shimano XTR drivetrain, gear changes are smooth and effortless, allowing riders to maintain momentum and tackle any obstacle on the trail.

The bike also features powerful Shimano XTR hydraulic disc brakes, ensuring reliable stopping power in all conditions.


In terms of design, the Rail 9.9 XTR Gen 4 boasts a sleek and modern look.

The frame is made from lightweight and durable carbon fiber, providing strength and agility without compromising on weight.

The bike also features a dropper seatpost, allowing riders to quickly adjust their seating position for optimal comfort and control.


Overall, the Trek Rail 9.9 XTR Gen 4 is a high-performance mountain bike that offers an unmatched riding experience.

Whether you’re an experienced rider looking for a new challenge or a beginner seeking a reliable and powerful bike, this model is worth considering.

With its advanced features, top-notch components, and impressive design, the Rail 9.9 XTR Gen 4 is sure to take your mountain biking adventures to the next level.

Order yours online today and pick it up at your local Trek store, or have it shipped to your home!