{"product_id":"tripeak-ema-jw1218a-a12scb","title":"TRiPEAK AERO Asymmetric Oversized Pulley Wheel Kit for Shimano \u0026 SRAM Road 12-Speed – 12\/18T","description":"\u003cp\u003eThe TRiPEAK asymmetric oversized pulley wheel kit for Shimano \u0026amp; SRAM Road 12-Speed uses the listed 12\/18T tooth combination. Check the exact rear derailleur model, generation and cage designation against the specification below. A shared Shimano, SRAM or Campagnolo name does not make different derailleur versions interchangeable.\u003c\/p\u003e\u003ch2\u003eCompatibility and supplied specification\u003c\/h2\u003e\u003cp\u003eAOPW AERO, 12\/18T for Shimano RD-92xx\/81xx\/71xx 12s; SRAM AXS RD E1 RED\/FORCE 2x12s\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecification:\u003c\/strong\u003e AOPW AERO, 12\/18T Asymmetric Oversized Pulley Wheel Kits for Shimano RD-92xx\/81xx\/71xx 12s; SRAM AXS RD E1 RED\/FORCE(2x12 speed), 2 sets of upper pulley side plates(4mm for SRAM\/5mm for Shimano), 3 sets of lower pulley inner side plates; screws for SRAM lower pulley or Shimano upper \u0026amp; lower pulley\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBBK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGold\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBGD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilver\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBSV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDark Blue\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBDB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Blue\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBLB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreen\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBGR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRed\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBRD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrange\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBOR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePurple\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBPL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePink\u003c\/td\u003e\n\u003ctd\u003eEMA-JW1218A-A12SCBPN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eChoosing this version\u003c\/h2\u003e\u003cp\u003eAOPW means asymmetric oversized pulley wheel. The larger pulley changes the chain’s path through the derailleur, so tooth count and model-specific mounting parts must match. AERO and EVO versions are separate product designs; choose by the supported derailleur and supplied parts rather than assuming all AOPW kits share the same fit.\u003c\/p\u003e\u003ch2\u003eInstallation checks\u003c\/h2\u003e\u003cp\u003eTRiPEAK’s \u003ca href=\"https:\/\/tripeakusa.com\/news\/keeps-the-whole-upgrade-fast-precise-and\"\u003eofficial AOPW upgrade article\u003c\/a\u003e describes retaining the original derailleur cage without requiring a longer chain. It also asks installers to check that chain length is appropriate for the bike’s setup. Follow the matching \u003ca href=\"https:\/\/tripeakusa.com\/support#manuals\"\u003eTRiPEAK installation manual\u003c\/a\u003e for the upper\/lower pulley positions and mounting parts, then check shifting and clearance through every gear.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eWill it fit a different generation of the same groupset?\u003c\/summary\u003e\u003cp\u003eOnly the models listed in this product’s specification are supported by the information here. Road AXS, XPLR, Eagle and T-Type are distinct applications. Check the full derailleur code and cage length before choosing a kit or wheel set.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhy use an 18T lower pulley?\u003c\/summary\u003e\u003cp\u003eTRiPEAK’s \u003ca href=\"https:\/\/tripeakusa.com\/news\/whats-the-benefit-of-a-bigger-pulley\"\u003e18T-versus-11T explanation\u003c\/a\u003e describes a gentler chain-bending angle with the larger pulley. The asymmetric mount accommodates the larger wheel in the supported original derailleur arm. Read \u003ca href=\"\/blogs\/news\/are-oversized-pulley-wheels-worth-it\"\u003ehow the AOPW upgrade works\u003c\/a\u003e for the design and fit details.\u003c\/p\u003e\u003c\/details\u003e\u003cp\u003eCompare \u003ca href=\"\/collections\/aopw-pulley-wheels\"\u003eTRiPEAK AOPW kits\u003c\/a\u003e and \u003ca href=\"\/collections\/pulley-wheels\"\u003epulley wheel sets\u003c\/a\u003e, or \u003ca href=\"\/pages\/contact\"\u003esend us your derailleur model\u003c\/a\u003e to check fit before ordering.\u003c\/p\u003e","brand":"TRiPEAK","offers":[{"title":"Black","offer_id":67736388730973,"sku":"EMA-JW1218A-A12SCBBK","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Gold","offer_id":67736587370589,"sku":"EMA-JW1218A-A12SCBGD","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Silver","offer_id":67736587403357,"sku":"EMA-JW1218A-A12SCBSV","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Dark Blue","offer_id":67736587436125,"sku":"EMA-JW1218A-A12SCBDB","price":220.0,"currency_code":"USD","in_stock":false},{"title":"Light Blue","offer_id":67736587468893,"sku":"EMA-JW1218A-A12SCBLB","price":220.0,"currency_code":"USD","in_stock":false},{"title":"Green","offer_id":67736587501661,"sku":"EMA-JW1218A-A12SCBGR","price":220.0,"currency_code":"USD","in_stock":false},{"title":"Red","offer_id":67736587534429,"sku":"EMA-JW1218A-A12SCBRD","price":220.0,"currency_code":"USD","in_stock":true},{"title":"Orange","offer_id":67736587567197,"sku":"EMA-JW1218A-A12SCBOR","price":220.0,"currency_code":"USD","in_stock":false},{"title":"Purple","offer_id":67736587599965,"sku":"EMA-JW1218A-A12SCBPL","price":220.0,"currency_code":"USD","in_stock":false},{"title":"Pink","offer_id":67736587632733,"sku":"EMA-JW1218A-A12SCBPN","price":220.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/1631\/1901\/files\/tripeak-pulley-import-b20d13d4239e.png?v=1791905420","url":"https:\/\/precisionwatts.com\/products\/tripeak-ema-jw1218a-a12scb","provider":"Precision Watts","version":"1.0","type":"link"}