Allows up to 12 degrees of rotation at the spider, reducing the effects of chain growth that reach the riders feet. This results in the feel of riding chainless Reduces the negative effects of chain growth on suspension performance Ochain R is externally adjustable between 4, 6, 9, and 12 deg of rotation, helping the rider optimize the balance of spider rotation and pedaling efficiency New Easy system adjuster Requires a 104 BCD chainring. Fits 32-36t chainrings Chainring bolts sold separately table{border-collapse:collapse;width:100%;}td{text-align: left;padding: 8px;font-weight:350;}tr:nth-child(even){background-color:#f2f2f2}th{background-color:#eb212e;color:white;text-align:left;padding:8px;}.desc ul{font-size:24px;font-weight:600;margin-left:-25px;padding-top:35px;border-top:3px solid #f0f0f0;}.desc li{list-style:none;border-bottom:4px solid #eb212e;width:142px;} TECH SPECS Model Ochain R Easy Configuration 1x Direct Mount Hope BCD 4x104mm Color Black