{"product_id":"shimano-tension-guide-pulley-set-rdrx820","title":"Shimano Tension \u0026 Guide Pulley Set RDRX820","description":"\u003cp data-end=\"182\" data-start=\"0\"\u003eThe \u003cstrong data-end=\"51\" data-start=\"4\"\u003eShimano RD-RX820 Tension \u0026amp; Guide Pulley Set\u003c\/strong\u003e (also sold under part code \u003cstrong data-end=\"92\" data-start=\"79\"\u003eY3JS98010\u003c\/strong\u003e) is a genuine replacement \u003cstrong data-end=\"139\" data-start=\"119\"\u003ejockey wheel set\u003c\/strong\u003e for Shimano GRX 12-speed rear derailleurs.\u003c\/p\u003e\r\n\r\n\u003cp data-end=\"221\" data-start=\"184\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003eShimano RD‑RX820 Tension \u0026amp; Guide Pulley Set\u003c\/span\u003e\u003c\/p\u003e\r\n\r\n\u003cp data-end=\"221\" data-start=\"184\"\u003e \u003c\/p\u003e\r\n\r\n\u003ch2 data-end=\"279\" data-section-id=\"qxmwqz\" data-start=\"265\"\u003eWhat it is\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"298\" data-start=\"280\"\u003eThis kit contains:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"380\" data-start=\"299\"\u003e\r\n\t\u003cli data-end=\"338\" data-section-id=\"l8a8qy\" data-start=\"299\"\u003e\u003cstrong data-end=\"338\" data-start=\"301\"\u003eGuide pulley (upper jockey wheel)\u003c\/strong\u003e\u003c\/li\u003e\r\n\t\u003cli data-end=\"380\" data-section-id=\"1tc4lrp\" data-start=\"339\"\u003e\u003cstrong data-end=\"380\" data-start=\"341\"\u003eTension pulley (lower jockey wheel)\u003c\/strong\u003e\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp data-end=\"413\" data-start=\"382\"\u003eIt’s designed specifically for:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"479\" data-start=\"414\"\u003e\r\n\t\u003cli data-end=\"440\" data-section-id=\"tm9uup\" data-start=\"414\"\u003eShimano \u003cstrong data-end=\"440\" data-start=\"424\"\u003eGRX RD-RX820\u003c\/strong\u003e\n\u003c\/li\u003e\r\n\t\u003cli data-end=\"479\" data-section-id=\"1wbrate\" data-start=\"441\"\u003e\u003cstrong data-end=\"479\" data-start=\"443\"\u003e12-speed gravel\/road drivetrains\u003c\/strong\u003e\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-end=\"484\" data-start=\"481\"\u003e\r\n\u003ch2 data-end=\"502\" data-section-id=\"1urilu4\" data-start=\"486\"\u003eWhat it does\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"578\" data-start=\"503\"\u003eThese pulleys sit inside your rear derailleur cage and are responsible for:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"788\" data-start=\"580\"\u003e\r\n\t\u003cli data-end=\"683\" data-section-id=\"1hx36od\" data-start=\"580\"\u003e\n\u003cstrong data-end=\"611\" data-start=\"582\"\u003eGuide pulley (top wheel):\u003c\/strong\u003e\r\n\r\n\t\u003cul data-end=\"683\" data-start=\"614\"\u003e\r\n\t\t\u003cli data-end=\"646\" data-section-id=\"2q5c5a\" data-start=\"614\"\u003edirects the chain as it shifts\u003c\/li\u003e\r\n\t\t\u003cli data-end=\"683\" data-section-id=\"13mrlrv\" data-start=\"649\"\u003eensures accurate gear engagement\u003c\/li\u003e\r\n\t\u003c\/ul\u003e\r\n\t\u003c\/li\u003e\r\n\t\u003cli data-end=\"788\" data-section-id=\"1mmmfvg\" data-start=\"685\"\u003e\n\u003cstrong data-end=\"721\" data-start=\"687\"\u003eTension pulley (bottom wheel):\u003c\/strong\u003e\r\n\t\u003cul data-end=\"788\" data-start=\"724\"\u003e\r\n\t\t\u003cli data-end=\"749\" data-section-id=\"5tvw0b\" data-start=\"724\"\u003emaintains chain tension\u003c\/li\u003e\r\n\t\t\u003cli data-end=\"788\" data-section-id=\"t9q9xh\" data-start=\"752\"\u003etakes up slack when shifting gears\u003c\/li\u003e\r\n\t\u003c\/ul\u003e\r\n\t\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp data-end=\"811\" data-start=\"790\"\u003eTogether they ensure:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"878\" data-start=\"812\"\u003e\r\n\t\u003cli data-end=\"829\" data-section-id=\"p14p6\" data-start=\"812\"\u003esmooth shifting\u003c\/li\u003e\r\n\t\u003cli data-end=\"849\" data-section-id=\"zlatd2\" data-start=\"830\"\u003estable chain line\u003c\/li\u003e\r\n\t\u003cli data-end=\"878\" data-section-id=\"xvu94d\" data-start=\"850\"\u003equiet drivetrain operation\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-end=\"883\" data-start=\"880\"\u003e\r\n\u003ch2 data-end=\"912\" data-section-id=\"8shrdi\" data-start=\"885\"\u003eWhy replacement matters\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"950\" data-start=\"913\"\u003eOver time, pulley wheels wear due to:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1016\" data-start=\"951\"\u003e\r\n\t\u003cli data-end=\"980\" data-section-id=\"1b9ymw0\" data-start=\"951\"\u003edirt and grit contamination\u003c\/li\u003e\r\n\t\u003cli data-end=\"997\" data-section-id=\"1ahsyv\" data-start=\"981\"\u003echain friction\u003c\/li\u003e\r\n\t\u003cli data-end=\"1016\" data-section-id=\"1tp0bn3\" data-start=\"998\"\u003elong mileage use\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp data-end=\"1041\" data-start=\"1018\"\u003eWorn pulleys can cause:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1128\" data-start=\"1042\"\u003e\r\n\t\u003cli data-end=\"1060\" data-section-id=\"lu5o7a\" data-start=\"1042\"\u003enoisy drivetrain\u003c\/li\u003e\r\n\t\u003cli data-end=\"1078\" data-section-id=\"gfzqap\" data-start=\"1061\"\u003esloppy shifting\u003c\/li\u003e\r\n\t\u003cli data-end=\"1100\" data-section-id=\"dm002k\" data-start=\"1079\"\u003eslower gear changes\u003c\/li\u003e\r\n\t\u003cli data-end=\"1128\" data-section-id=\"g712qi\" data-start=\"1101\"\u003echain skipping under load\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-end=\"1133\" data-start=\"1130\"\u003e\r\n\u003ch2 data-end=\"1158\" data-section-id=\"ebosfz\" data-start=\"1135\"\u003eKey characteristics\u003c\/h2\u003e\r\n\r\n\u003cul data-end=\"1349\" data-start=\"1159\"\u003e\r\n\t\u003cli data-end=\"1206\" data-section-id=\"x0woz1\" data-start=\"1159\"\u003eDesigned for \u003cstrong data-end=\"1206\" data-start=\"1174\"\u003eShimano GRX 12-speed systems\u003c\/strong\u003e\n\u003c\/li\u003e\r\n\t\u003cli data-end=\"1252\" data-section-id=\"1q3y2vd\" data-start=\"1207\"\u003eUses \u003cstrong data-end=\"1252\" data-start=\"1214\"\u003esealed bearings (on most versions)\u003c\/strong\u003e\n\u003c\/li\u003e\r\n\t\u003cli data-end=\"1310\" data-section-id=\"mr08oa\" data-start=\"1253\"\u003eEngineered tooth profiles for \u003cstrong data-end=\"1310\" data-start=\"1285\"\u003eprecise chain control\u003c\/strong\u003e\n\u003c\/li\u003e\r\n\t\u003cli data-end=\"1349\" data-section-id=\"srlyjl\" data-start=\"1311\"\u003eLightweight but durable construction\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-end=\"1354\" data-start=\"1351\"\u003e\r\n\u003ch2 data-end=\"1378\" data-section-id=\"8d8b6g\" data-start=\"1356\"\u003eCompatibility note\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"1431\" data-start=\"1379\"\u003eThis set is typically \u003cstrong data-end=\"1425\" data-start=\"1401\"\u003eNOT cross-compatible\u003c\/strong\u003e with:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1541\" data-start=\"1432\"\u003e\r\n\t\u003cli data-end=\"1466\" data-section-id=\"q0bp1d\" data-start=\"1432\"\u003e10\/11-speed Shimano road pulleys\u003c\/li\u003e\r\n\t\u003cli data-end=\"1495\" data-section-id=\"1kqag89\" data-start=\"1467\"\u003eolder GRX 11-speed systems\u003c\/li\u003e\r\n\t\u003cli data-end=\"1541\" data-section-id=\"1djn5q3\" data-start=\"1496\"\u003eMTB derailleurs (unless explicitly matched)\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp data-end=\"1588\" data-start=\"1543\"\u003eShimano pulley systems are quite specific to:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1638\" data-start=\"1589\"\u003e\r\n\t\u003cli data-end=\"1602\" data-section-id=\"uwqvbu\" data-start=\"1589\"\u003ecage design\u003c\/li\u003e\r\n\t\u003cli data-end=\"1616\" data-section-id=\"4wh58j\" data-start=\"1603\"\u003echain width\u003c\/li\u003e\r\n\t\u003cli data-end=\"1638\" data-section-id=\"gk2idn\" data-start=\"1617\"\u003ederailleur geometry\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-end=\"1643\" data-start=\"1640\"\u003e\r\n\u003ch2 data-end=\"1664\" data-section-id=\"321yx1\" data-start=\"1645\"\u003eWhen to replace\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"1691\" data-start=\"1665\"\u003eReplace the pulley set if:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1821\" data-start=\"1692\"\u003e\r\n\t\u003cli data-end=\"1720\" data-section-id=\"190kq2o\" data-start=\"1692\"\u003eteeth look hooked or sharp\u003c\/li\u003e\r\n\t\u003cli data-end=\"1747\" data-section-id=\"yhqs6u\" data-start=\"1721\"\u003edrivetrain becomes noisy\u003c\/li\u003e\r\n\t\u003cli data-end=\"1785\" data-section-id=\"emlexz\" data-start=\"1748\"\u003eshifting feels delayed or imprecise\u003c\/li\u003e\r\n\t\u003cli data-end=\"1821\" data-section-id=\"qqo6nw\" data-start=\"1786\"\u003ebearings feel rough when spinning\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-end=\"1826\" data-start=\"1823\"\u003e\r\n\u003ch2 data-end=\"1843\" data-section-id=\"1g6g9c7\" data-start=\"1828\"\u003eBottom line\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"221\" data-start=\"184\"\u003e \u003c\/p\u003e\r\n\r\n\u003cp data-end=\"2106\" data-start=\"1844\"\u003eThe Shimano RD-RX820 pulley set is a \u003cstrong data-end=\"1927\" data-start=\"1881\"\u003eprecision OEM replacement jockey wheel kit\u003c\/strong\u003e that restores smooth shifting and correct chain control on GRX 12-speed drivetrains, keeping the rear derailleur running quietly and efficiently under gravel and road conditions.\u003c\/p\u003e\r\n","brand":"Shimano","offers":[{"title":"Default Title","offer_id":45432913952828,"sku":"Y3JS98010","price":210.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/2261\/8940\/files\/23590_image-48832.webp?v=1779371379","url":"https:\/\/www.olympiccycles.co.za\/products\/shimano-tension-guide-pulley-set-rdrx820","provider":"Olympic Cycles","version":"1.0","type":"link"}