{"product_id":"frein-arriere-hope-tech-4-evo-tr4-aviation-argent-orange","title":"HOPE TECH 4 EVO TR4 Aviation Rear Brake Silver\/Orange","description":"\u003cp data-start=\"0\" data-end=\"418\"\u003eThe \u003cstrong data-start=\"3\" data-end=\"32\"\u003eHOPE TECH 4 EVO TR4 brake\u003c\/strong\u003e with \u003cstrong\u003eaviation hose\u003c\/strong\u003e represents the ultimate evolution of the renowned Tech 4 master cylinder. Entirely machined from a 2014 T6 aluminium block, it stands out with a high-precision design offering an \u003cstrong data-start=\"215\" data-end=\"239\"\u003eexceptional feel\u003c\/strong\u003e and perfectly controlled braking power. This high-end model is aimed at demanding riders looking for performance, reliability and customisation for \u003cstrong\u003eall-mountain or Trail\u003c\/strong\u003e riding.\u003c\/p\u003e\n\u003cp data-start=\"420\" data-end=\"860\"\u003eThe \u003cstrong data-start=\"423\" data-end=\"453\"\u003eTECH 4 EVO master cylinder\u003c\/strong\u003e benefits from major improvements: new piston, floating head, optimised cam, second guide ring and three new levers (optional) for \u003cstrong data-start=\"598\" data-end=\"627\"\u003eprecise and smooth control\u003c\/strong\u003e. The lever pivot rests on two \u003cstrong data-start=\"664\" data-end=\"689\"\u003eannular bearings\u003c\/strong\u003e, ensuring a consistent and durable response. The adjustment dials allow easy setting of \u003cstrong data-start=\"790\" data-end=\"815\"\u003ethe reach and free stroke\u003c\/strong\u003e of the lever according to the rider's preferences.\u003c\/p\u003e\n\u003cp data-start=\"862\" data-end=\"1172\"\u003eThe \u003cstrong data-start=\"864\" data-end=\"878\"\u003eTR4 calliper\u003c\/strong\u003e, also machined from a 2014 T6 aluminium block, uses the \u003cstrong data-start=\"949\" data-end=\"963\"\u003ePost-Mount\u003c\/strong\u003e standard (74.2 mm bolt spacing). It features four stainless steel and phenolic resin pistons — two at 16 mm and two at 17 mm — ensuring \u003cstrong data-start=\"1086\" data-end=\"1127\"\u003eoptimal power distribution\u003c\/strong\u003e and excellent heat resistance. \u003cspan\u003eThe larger pistons increase the braking ratio by approximately 6.5% compared to the Tech 4 E4 braking system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1174\" data-end=\"1532\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eThe brake comes with two types of \u003cstrong data-start=\"1212\" data-end=\"1226\"\u003epads\u003c\/strong\u003e: Racing (green) for competition and All Conditions (red) for maximum versatility. With its \u003cstrong data-start=\"1335\" data-end=\"1366\"\u003e14 colour combinations\u003c\/strong\u003e, its \u003cstrong data-start=\"1383\" data-end=\"1398\"\u003eMatchmakers\u003c\/strong\u003e options and its exclusive compatibility with \u003cstrong data-start=\"1437\" data-end=\"1455\"\u003eDOT 4.0 or 5.0\u003c\/strong\u003e, the HOPE TECH 4 EVO TR4 embodies the \u003cstrong data-start=\"1491\" data-end=\"1531\"\u003epinnacle of high-end braking\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/3444\/9318\/files\/2025-TECH-BOOK-TECH4-EVO-TR4-1.pdf?v=1759830892\" title=\"Hope Tech Book Tech 4 evo TR4\"\u003e\u003cstrong\u003eTechnical manual.\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"HOPE","offers":[{"title":"Default Title","offer_id":55591409549692,"sku":"PBS_HOPE044369","price":312.59,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/3444\/9318\/files\/t4et4scbr_1024x1024_32650949-d857-4a0a-bcbf-75e711307e6b.jpg?v=1764147929","url":"https:\/\/probikeshop.com\/products\/hope-tech-4-evo-tr4-aviation-rear-brake-silver-orange","provider":"Probikeshop","version":"1.0","type":"link"}