{"product_id":"acl-trimetal-reinforced-rod-bearings-peugeot-xu9-xu10","title":"ACL Race Series connecting rod bearings for Peugeot XU9, XU10","description":"\u003cp\u003eACL Race Series connecting rod bearings for Peugeot XU9, XU10 (part number 4B7700H), designed for engines that will operate under significantly higher loads and RPMs than stock.\u003c\/p\u003e\u003cp\u003eThese are tri-metal bearings: a SAE 1010 steel backing, a copper, lead, and tin layer of approximately 0.3 mm, a nickel barrier, and a lead, tin, and copper overlay that conforms to the crankshaft surface and resists seizure. In connecting rod bearings, the overlay is thinner to better withstand fatigue.\u003c\/p\u003e\u003cp\u003eACL manufactures them with more \"crush\" (housing interference) than a standard bearing to ensure they are held securely and dissipate heat more effectively, and with more eccentricity, which helps maintain the oil film when the housing deforms at high RPMs.\u003c\/p\u003e\u003cp\u003eIn the standard size, ACL specifies them for a connecting rod journal of 49.984 to 50.000 mm, with a bearing width of 20.25 mm. For that diameter, they recommend an oil clearance of approximately 0.053 to 0.063 mm, measured with a micrometer and bore gauge. If the crankshaft is reground, the measurement changes.\u003c\/p\u003e\u003cp\u003eThey do not have the silver-tin final plating of standard bearings, so their dark color—ranging from brown and black to bluish—is the factory finish and does not indicate any defect. ACL advises against polishing the bearing surface to adjust clearance; if more is needed, they should be combined with the HX version, which provides 0.025 mm of additional clearance.\u003c\/p\u003e\u003cp\u003eBefore ordering, confirm your crankshaft measurement (standard or reground); if you have any questions, write to us with your engine code.\u003c\/p\u003e","brand":"ACL","offers":[{"title":"Default Title","offer_id":50813101244750,"sku":"ACL-4B7700H\/97","price":72.09,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/7329\/0062\/files\/acl-rod-bearings_aaf1d3c0-4a05-4b14-86ee-3f9f21a2aa36.jpg?v=1735903837","url":"https:\/\/driftandgrip.com\/en\/products\/acl-trimetal-reinforced-rod-bearings-peugeot-xu9-xu10","provider":"Drift \u0026 Grip","version":"1.0","type":"link"}