Handlebar height requirements vary depending on the type of cycling you are doing. Racing cyclists prefer low handlebars to improve aerodynamics, but mountain bike riders prefer higher handlebars to improve riding form and comfort. Most Diamondback mountain bikes come equipped with a threaded headset, which is easily adjustable to fit your riding needs.
Step 1
Mount the bicycle in a trainer to stabilize it while you work. If you do not own a trainer, place the bicycle's kickstand in a down position or balance it against a solid object.
Step 2
Insert a 6mm Allen wrench into the stem bolt on the headset. The insert is located on the top cap of the steering column where the handlebars meet the intersecting tube.
Step 3
Turn the wrench clockwise to raise the handlebars. As the handlebars rise, the stem bolt lowers an expanding binder bolt into the steering column.
Step 4
Monitor the fork that attaches to the handlebars as you raise them. There is a minimum insertion mark engraved on the side of the fork and it should not be visible. If you can see the mark, the handlebars have been raised too far and the stem bolt is in danger of becoming disconnected from the steering tube. Turn the bolt counterclockwise to lower the handlebars immediately.
Step 5
Mount the bicycle and test the handlebar height. Ensure you can sit comfortably with your back straight and your arms slightly bent. Check your ability to reach the hand controls efficiently. Make further adjustments to the stem bolt if necessary.
Step 6
Dismount the bicycle and straddle the front tire with your legs. Pinch your legs together tightly to hold the tire in place. Grab the handlebar grips firmly in your hands and rotate them to the left and right while you hold the tire in place. If the handlebars turn out of alignment with the tire, the stem bolt has been loosened too far.
Step 7
Check the tension on the front brakes when you have completed moving the handlebars. Raising the handlebars a significant amount can increase tension in the brake line and cause it to become locked. Loosen the brake tension if necessary.
Tips and Warnings
- If your Diamondback mountain bike has a threadless headset, the company advises having a professional raise the handlebars because special tools and components are required inside of the mechanism.
Things You'll Need
- 6mm Allen wrench
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