{"product_id":"120-bcd-chainrings","title":"120 BCD Chainrings","description":"\u003cp\u003e120 BCD cranksets were introduced with SRAM 2x10 drivetrains and are excellent candidates for a 1x conversion with our patented Drop-Stop\u003csup\u003e®\u003c\/sup\u003e chainrings. These rings will allow you to convert your 120 BCD crankset, like the SRAM XX and others, to a 1x drivetrain.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eFits 120 BCD cranksets or 4-bolt spiders\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDrop-Stop technology. On Wolf Tooth’s patented wide\/narrow chainring, the wide side of the tooth has maximum contact on the drive side which spreads the load and improves chainring life. The narrow side allows clearance for mud and debris which reduces friction.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAlternating wide\/narrow tooth pattern prevents chain derailment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThese rings fit any 120 BCD crankset or 4-bolt spider.\u003c\/li\u003e\n\u003cli\u003eYou must use M10x.75 bolts with a shoulder on them. These are not standard bolts and Wolf Tooth's bolts will not work with this chainring. Note that only about 3 threads will engage (same with the stock SRAM rings)\u003c\/li\u003e\n\u003cli\u003eSRAM is the only supplier of the  M10 x .75 bolts \u003c\/li\u003e\n\u003cli\u003e36t is the smallest number of teeth that fits on a 120 BCD\u003c\/li\u003e\n\u003cli\u003eIf using a 9-speed drivetrain use a 10-speed chain (shifts and works well on a 9-speed drivetrain and fits the ring tighter for better chain retention).\u003c\/li\u003e\n\u003cli\u003eChainline - 51mm for 36t and 52mm for 38t (38t is wider for more chainstay clearance)\u003c\/li\u003e\n\u003cli\u003eNOT compatible with FSA 4 bolt cranksets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"PdpSqImgLinks\"\u003e\n\u003ca href=\"https:\/\/www.wolftoothcomponents.com\/pages\/how-to-measure-bolt-circle-diameter-bcd\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0230\/9291\/files\/BCDmeasurementGuide_compact_a0845f3a-7496-4df4-a34a-fed3ac9931ea_compact.png?v=1548116045\"\u003e\u003c\/a\u003e  \u003ca style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 1.4em;\" title=\"Chain compatibility by chainring tooth profile\" href=\"https:\/\/www.wolftoothcomponents.com\/pages\/chain-compatibility-by-chainring-tooth-profile\"\u003e\u003cimg height=\"160\" width=\"160\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0230\/9291\/files\/ChainCompatibility_480x480.jpg?v=1592260735\"\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003ch2\u003eRecommendations\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBefore you buy a 120 BCD ring, check to see if your cranksets has a removable spider and compatible with our direct mount rings. To determine if your spider is removable, see the top two boxes in the decision tree (the 4th picture in the product pictures).  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eIf you plan to ride in very muddy conditions, we recommend a chainguide or chainkeeper along with \u003cspan\u003ea clutch style rear derailleur for the best chain security.\u003c\/span\u003e Without these precautions, you may experience chain drops and\/or chainsuck.\u003c\/p\u003e\n\u003ch2\u003eTech Specs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 36T • 54g  \u003cstrong\u003e|\u003c\/strong\u003e  38T • 59g\u003cbr\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e 7075-T6 aluminum\u003cbr\u003e\u003cstrong\u003eMade in the USA\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.wolftoothcomponents.com\/pages\/wolf-tooth-patents-and-trademarks\"\u003ePatent and trademark information\u003c\/a\u003e\u003c\/p\u003e","brand":"Wolf Tooth Components","offers":[{"title":"Drop-Stop A \/ 36T","offer_id":44724477034530,"sku":"12036","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0786\/7940\/8674\/files\/WT-DROPSTOP_A-12036.jpg?v=1767989792","url":"https:\/\/www.tonkacycleandski.com\/products\/120-bcd-chainrings","provider":"Tonka Cycles and Skis","version":"1.0","type":"link"}