MCS Chain Tensioners

The Alienation Circle Jerks Chain Tensioners work like a reverse chain tensioner. These fill the space in front of the axle, in between that and th...

The Alienation Circle Jerks Chain Tensioners work like a reverse chain tensioner. These fill the space in front of the axle, in between that and th...

The Black Ops Chain Tensioner (Pair) helps keep your chain tight and your bike looking good.  CNC machined 6061-T6 aluminum chain tensioners Com...

Adjusting chain tension is quick and easy with the new Box Three™ Chain Tensioner. With a single hole "lollipop" design, these tensioners reduce we...

The Box Two Chain Tensioners are crafted from a strong 6061 aluminum and drilled with two different mounting holes to work on most frames and provi...