Ensuring that your new bike is properly fit to you is an important step in preparing for your first ride. The Rockhopper is offered with different wheel sizes depending on the rider's size. 

Height (in)Height (cm)Bike sizeWheel size
4'3" – 4'9"129 – 145XXS26
4'8" – 5'1"142 – 156XS27.5
5'0" – 5'5"152 – 165S27.5 or 29
5'4" – 5'10"162 – 178M27.5 or 29
5'9" – 6'1"175 – 185L29
6'0" – 6'5"183 – 198XL29
6'4" – 6'9"193 – 206XXL29


Your Authorized Specialized Retailer will be able to provide a basic fit, ensuring that you are able to ride your bike comfortably and efficiently. Specialized also offers Retül Fit, a data-driven bicycle fitting tool designed to improve comfort, prevent injury, and increase performance.

Adjust the saddle height

The correct saddle height is crucial for pedaling efficiency and comfort. 


If you raise the saddle height, ensure that the seatpost is inserted past the minimum insertion line. Aftermarket dropper posts are compatible and should be internally routed. Seatpost diameter is 30.9.

Image of seatpost insertion -click to enlarge


Adjust the reach

If your bike is the correct size, you should be able to comfortably reach the handlebars with your elbows slightly bent. Your bike saddle can move back and forth on the rails–start with it centered and fine tune as needed. A professional bike fitter will set this position to line up your knee with the pedal axle. You can also adjust your reach by raising or lowering your handlebar height, and by increasing or decreasing the length of your bike stem.