{"product_id":"enduro-bkcj-0340-11-tooth-xd-15-ceramic-hybrid-bearing-machined-delrin-derailleur-pulleys","title":"ENDURO BKCJ-0340 – 11 tooth, XD-15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano Dura Ace (9000 Series) and Ultegra (8000 Series) Derailleurs (5mm bolt hole) – Red","description":"\u003cdiv class=\"\" data-turn-id-container=\"7e1354d9-984c-4f26-808d-6cedde025ff6\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-(--header-height)\" dir=\"auto\" data-turn-id=\"7e1354d9-984c-4f26-808d-6cedde025ff6\" data-turn-id-container=\"7e1354d9-984c-4f26-808d-6cedde025ff6\" data-testid=\"conversation-turn-3\" data-scroll-anchor=\"false\" data-turn=\"user\"\u003e\u003c\/section\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:55ec4939-48c3-4900-b5bd-55053ec80986-11\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:55ec4939-48c3-4900-b5bd-55053ec80986-11\" data-turn-id-container=\"request-WEB:55ec4939-48c3-4900-b5bd-55053ec80986-11\" data-testid=\"conversation-turn-4\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"a2581521-1346-4386-aec9-b126f5c6741c\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"streaming-animation markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003ch1 data-section-id=\"yubsth\" data-start=\"0\" data-end=\"86\"\u003eENDURO BKCJ-0340 11T Ceramic Derailleur Pulleys for Shimano Dura Ace \u0026amp; Ultegra – Red\u003c\/h1\u003e\n\u003cp data-start=\"88\" data-end=\"1016\"\u003eUpgrade your drivetrain performance with the ENDURO BKCJ-0340 Ceramic Derailleur Pulley Set, specially designed for Shimano Dura Ace 9000 Series and Ultegra 8000 Series 11-speed rear derailleurs. Built using precision-machined Delrin pulley wheels and premium XD-15 Ceramic Hybrid Bearings, this pulley set delivers smoother shifting, lower drivetrain friction, and improved efficiency during every ride. The lightweight construction helps reduce rotational resistance while maintaining excellent durability for road cycling performance. Its striking red finish also adds a premium custom look to your bike setup. Designed with a 5mm bolt hole for accurate compatibility, these pulley wheels are ideal for riders looking to enhance drivetrain smoothness, reliability, and long-term performance. Whether you ride competitively or train regularly, this upgrade offers noticeable drivetrain refinement and efficient power transfer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Oyeathlete","offers":[{"title":"Black","offer_id":42445497696291,"sku":"BKCJ-0340","price":18749.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/2043\/2675\/files\/Untitled-2026-05-27T104449.243.webp?v=1779858902","url":"https:\/\/oyeathlete.com\/products\/enduro-bkcj-0340-11-tooth-xd-15-ceramic-hybrid-bearing-machined-delrin-derailleur-pulleys","provider":"Oyeathlete","version":"1.0","type":"link"}