{"product_id":"shimano-clamp-band-fd-r9150f-31-8","title":"Shimano Clamp Band Fd-R9150F 31.8","description":"\u003cp data-end=\"221\" data-start=\"0\"\u003eThe \u003cstrong data-end=\"43\" data-start=\"4\"\u003eShimano Clamp Band FD-R9150F 31.8mm\u003c\/strong\u003e is not a normal “standalone part” like a stem or derailleur—it’s actually a \u003cstrong data-end=\"175\" data-start=\"120\"\u003efront derailleur mounting clamp\/adapter system part\u003c\/strong\u003e used with Shimano Di2 road front derailleurs.\u003c\/p\u003e\r\n\r\n\u003cp data-end=\"293\" data-start=\"223\"\u003eSpecifically, it relates to the \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003eShimano FD-R9150 Dura-Ace Front Derailleur\u003c\/span\u003e.\u003c\/p\u003e\r\n\r\n\u003chr data-end=\"298\" data-start=\"295\"\u003e\r\n\u003ch2 data-end=\"323\" data-section-id=\"pvrkts\" data-start=\"300\"\u003eWhat it actually is\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"371\" data-start=\"324\"\u003eThe \u003cstrong data-end=\"359\" data-start=\"328\"\u003eFD-R9150F clamp band (31.8)\u003c\/strong\u003e is used to:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"483\" data-start=\"372\"\u003e\r\n\t\u003cli data-end=\"430\" data-section-id=\"1xssq0u\" data-start=\"372\"\u003emount a \u003cstrong data-end=\"430\" data-start=\"382\"\u003ebraze-on style Dura-Ace Di2 front derailleur\u003c\/strong\u003e\n\u003c\/li\u003e\r\n\t\u003cli data-end=\"483\" data-section-id=\"1in9zln\" data-start=\"431\"\u003eonto a \u003cstrong data-end=\"483\" data-start=\"440\"\u003eround seat tube frame (31.8mm diameter)\u003c\/strong\u003e\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp data-end=\"595\" data-start=\"485\"\u003eSo instead of the derailleur bolting directly to a frame mount, this clamp lets you attach it to a round tube.\u003c\/p\u003e\r\n\r\n\u003chr data-end=\"600\" data-start=\"597\"\u003e\r\n\u003ch2 data-end=\"619\" data-section-id=\"ihejj1\" data-start=\"602\"\u003eWhy it exists\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"650\" data-start=\"620\"\u003eMany high-end road frames use:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"690\" data-start=\"651\"\u003e\r\n\t\u003cli data-end=\"690\" data-section-id=\"142zcfg\" data-start=\"651\"\u003e\u003cstrong data-end=\"690\" data-start=\"653\"\u003ebraze-on mounts (no clamp needed)\u003c\/strong\u003e\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp data-end=\"753\" data-start=\"692\"\u003eBut if your frame does NOT have that mount, Shimano provides:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"818\" data-start=\"754\"\u003e\r\n\t\u003cli data-end=\"818\" data-section-id=\"1r4gin6\" data-start=\"754\"\u003eclamp band adapters like \u003cstrong data-end=\"818\" data-start=\"781\"\u003e31.8mm \/ 28.6mm \/ 34.9mm versions\u003c\/strong\u003e\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp data-end=\"846\" data-start=\"820\"\u003eSo this part is basically:\u003c\/p\u003e\r\n\r\n\u003cblockquote data-end=\"928\" data-start=\"847\"\u003e\r\n\u003cp data-end=\"928\" data-start=\"849\"\u003ea “conversion clamp” for mounting Di2 front derailleurs on non-braze-on frames.\u003c\/p\u003e\r\n\u003c\/blockquote\u003e\r\n\r\n\u003chr data-end=\"933\" data-start=\"930\"\u003e\r\n\u003ch2 data-end=\"961\" data-section-id=\"67wexb\" data-start=\"935\"\u003eKey compatibility note\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"985\" data-start=\"962\"\u003eThe “31.8mm” refers to:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1041\" data-start=\"986\"\u003e\r\n\t\u003cli data-end=\"1041\" data-section-id=\"1wmcqvf\" data-start=\"986\"\u003ethe \u003cstrong data-end=\"1014\" data-start=\"992\"\u003eseat tube diameter\u003c\/strong\u003e, NOT the derailleur itself\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp data-end=\"1066\" data-start=\"1043\"\u003eCommon Shimano options:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1173\" data-start=\"1067\"\u003e\r\n\t\u003cli data-end=\"1096\" data-section-id=\"bpjtpq\" data-start=\"1067\"\u003e28.6mm (older steel frames)\u003c\/li\u003e\r\n\t\u003cli data-end=\"1139\" data-section-id=\"17q11y7\" data-start=\"1097\"\u003e31.8mm (modern alloy\/carbon road frames)\u003c\/li\u003e\r\n\t\u003cli data-end=\"1173\" data-section-id=\"18vrfgi\" data-start=\"1140\"\u003e34.9mm (larger MTB-style tubes)\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-end=\"1178\" data-start=\"1175\"\u003e\r\n\u003ch2 data-end=\"1199\" data-section-id=\"a7xjq3\" data-start=\"1180\"\u003eWhere it’s used\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"1234\" data-start=\"1200\"\u003eThis clamp is typically used with:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1330\" data-start=\"1235\"\u003e\r\n\t\u003cli data-end=\"1280\" data-section-id=\"qvreyj\" data-start=\"1235\"\u003eShimano Dura-Ace Di2 groupsets (like R9150)\u003c\/li\u003e\r\n\t\u003cli data-end=\"1330\" data-section-id=\"i2euas\" data-start=\"1281\"\u003eUltegra Di2 equivalents (with adapter variants)\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-end=\"1335\" data-start=\"1332\"\u003e\r\n\u003ch2 data-end=\"1359\" data-section-id=\"kby657\" data-start=\"1337\"\u003eSimple explanation\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"1377\" data-start=\"1360\"\u003eIf your bike has:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1431\" data-start=\"1378\"\u003e\r\n\t\u003cli data-end=\"1431\" data-section-id=\"12r6gf0\" data-start=\"1378\"\u003eno built-in derailleur mount\u003cbr data-end=\"1411\" data-start=\"1408\"\u003e\r\n\t→ you use this clamp\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cp data-end=\"1459\" data-start=\"1433\"\u003eIf your frame already has:\u003c\/p\u003e\r\n\r\n\u003cul data-end=\"1500\" data-start=\"1460\"\u003e\r\n\t\u003cli data-end=\"1500\" data-section-id=\"hmdxxe\" data-start=\"1460\"\u003ea braze-on mount\u003cbr data-end=\"1481\" data-start=\"1478\"\u003e\r\n\t→ you don’t need it\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-end=\"1505\" data-start=\"1502\"\u003e\r\n\u003ch2 data-end=\"1522\" data-section-id=\"1g6g9c7\" data-start=\"1507\"\u003eBottom line\u003c\/h2\u003e\r\n\r\n\u003cp data-end=\"1711\" data-start=\"1523\"\u003eThe Shimano FD-R9150F 31.8 clamp band is a \u003cstrong data-end=\"1660\" data-start=\"1566\"\u003emounting adapter that lets a Di2 front derailleur attach to a 31.8mm round seat tube frame\u003c\/strong\u003e, rather than being a performance component itself.\u003c\/p\u003e\r\n","brand":"Shimano","offers":[{"title":"Default Title","offer_id":44256789463262,"sku":"SMAD91MS","price":260.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1242\/8790\/files\/14893_shimano-sm-ad91-dura-ace-di2-front-derailleur-clamp-band-adapater-dismount-toronto-canada.jpg?v=1750174791","url":"https:\/\/onlino-bicycle-shopco.shop\/products\/shimano-clamp-band-fd-r9150f-31-8","provider":"Online Bicycle Shop","version":"1.0","type":"link"}