Our dual-suspension R and RX model bikes are equipped with a chain tensioner. Just as the name of this component implies, its job is to ensure the chain is properly tensioned. The chain tensioner is necessary because as the rear suspension expands and contracts to compensate for the riding surface, the distance between the cranks and the rear axle changes. If the bike were to not have a chain tensioner, the chain could very possibly snap when the suspension compresses.

Symptoms of Chain Adjustment Needed

• If the chain tensioner is out of adjustment your chain may be popping off when you try to pedal the bike.
• You may also experience excessive drivetrain noise coming from the rear end.
• The video below is a great visual aid for the points this article will touch on.
  
  

SUPER73 will not be held liable for any damage that may occur due to the mishandling of the bike. If you are not comfortable with performing the following steps, please have your local cycle mechanic perform the work.

Tools Needed

• 4mm Allen Wrench

Adjusting Chain Slack

1. Remove the chain from the chainring and allow it to rest on the crank arm.
2. Using the 4mm Allen wrench, loosen the chain tensioner adjustment bolt.
3. Rotate the tensioner clockwise, increasing the amount of tension being applied to the chain.
4. Once you have rotated the chain tensioner to achieve the desired tension, rotate it again slightly and tighten the adjustment bolt.
5. Release the tensioner and verify the chain slack.
6. Reinstall the chain to the chainring and verify the chain rotates smoothly. 

Chain Tensioner Alignment

1. Remove the chain from the chainring and allow it to rest on the crank arm.
2. Using a 4mm Allen wrench, loosen the chain tensioner adjustment bolt.
3. Once the bolt is loose, slide the chain tensioner along the alignment pin either forward or backward until the chain tensioner wheel is in line with the rear cog.