{"product_id":"e-thirteen-helix-r-107-bcd-4-bolt-chainring-42t-11-12-speed-107bcd-black","title":"e*thirteen Helix R 107 BCD 4-Bolt Chainring - 42t 11\/12-Speed 107BCD Black","description":"\u003cstyle\u003e.top{margin-bottom:30px;}.top li{margin-left:5%;margin-right:5%;margin-top:10px;line-height:120%;list-style-position:outside;}\u003c\/style\u003e\u003cdiv class=\"top\"\u003ee*thirteen Helix R 107 BCD 4-Bolt Chainring - 42t 11\/12-Speed 107BCD Black. The e*thirteen Helix R 107BCD Chainring designed for 4-bolt 107BCD cranks like SRAM Red or Force including power meter equipped cranks offers a performance upgrade for Gravel and Road cyclists. The 38 40 and 42 tooth rings pair perfectly with e*thirteen’s cassettes for more overall range and higher top speeds. Made from durable premium 7075 alloy theyre CNC sculpted for a high stiffness-to-weight ratio. Compatible with both SRAM and Shimano 11 and 12-speed drivetrains.  Chainline is set by SRAM® Crank assembly.\u003cli\u003eCompatible with 4-bolt 107 BCD SRAM® cranks and Quarq® power meter cranks\u003c\/li\u003e\n\u003cli\u003eM4 narrow-wide tooth profile provides Shimano and SRAM 11\/12-speed chain compatibility (Including flattop chains) excellent chain retention and reduced wear\u003c\/li\u003e\n\u003cli\u003e4.8mm offset (Chainline is determined by SRAM® Crank assembly 45mm for normal width cranks 47.5mm for wide cranks)\u003c\/li\u003e\n\u003cli\u003eForged from premium 7075-T7 aluminum then extensively CNC optimized for light weight and technical aesthetics\u003c\/li\u003e\n\u003cli\u003eDurable 7075-T7 construction for long wear-life stiffness and strength\u003c\/li\u003e\n\u003c\/div\u003e\u003cstyle\u003etable{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;}\u003c\/style\u003e\u003cdiv class=\"desc\"\u003e\u003cul\u003e\u003cli\u003e TECH SPECS\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\u003ctable\u003eRing Position\/Type Chain Retaining Single RingTooth Count 42Drivetrain Speeds 11Drivetrain Speeds 12Round or Oval RoundChainring BCD 107Material AluminumColor BlackWeight 81Defined Color Black\u003c\/table\u003e","brand":"E*thirteen","offers":[{"title":"Default Title","offer_id":50749200990526,"sku":"CR4212","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/2933\/4334\/files\/CR4211_094c61c9-5ee2-46d8-8d25-a643fb88affe.jpg?v=1730494134","url":"https:\/\/www.goodwynns.com\/products\/e-thirteen-helix-r-107-bcd-4-bolt-chainring-42t-11-12-speed-107bcd-black","provider":"Goodwynn's","version":"1.0","type":"link"}