{"product_id":"audi-rs3-8v-8y-rear-rotor-pair-310-22","title":"Audi RS3 8V \/ 8Y Rear Two-Piece Rotor Pair — 309.9×22mm","description":"\u003cp\u003e\u003cstrong\u003eAudi RS3 8V \/ 8Y rear rotors — 309.9 × 22 mm, sold as a pair.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e309.9 mm, not 310. The decimal is not a rounding artefact — it is the actual diameter, and it is what separates this disc from the 310 × 22 mm used on the TT RS. Half a millimetre of diameter and a different hat, and the two do not swap.\u003c\/p\u003e\n\u003cp\u003eG3500 high-carbon ring at 309.9 × 22 mm, 20.0 mm minimum, 48.5 mm total height, 65 mm centre bore, 5 bolt holes, 6061-T6 hat. At 22 mm from new there is no resurfacing margin, so a scored face means replacement, not machining.\u003c\/p\u003e\n\u003cp\u003eDigital calipers will read 309.9, not 310. If you measure 310.0 on a 58.6 mm hat you have the TT RS disc; if the hat is 48.5 mm, you have this one. The height decides it faster than the diameter does.\u003c\/p\u003e\n\u003cp\u003eOE reference 1K0615601N · Minimum thickness 20.0 mm · Bolt holes 5\u003c\/p\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e▸ \u003cstrong\u003eFitment check\u003c\/strong\u003e\u003c\/summary\u003e\n  \u003cp\u003eRS3 8V and 8Y rear, 309.9 × 22 mm — OE 1K0615601N. The TT RS 8J rear disc is 310 × 22 mm at a 58.6 mm hat and is a different part.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e▸ \u003cstrong\u003eFixed or full-floating — which one?\u003c\/strong\u003e\u003c\/summary\u003e\n  \u003cp\u003eRear axle on a road car: Fixed. There is no meaningful gain from floating hardware at the rear unless the car is used on track.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e▸ \u003cstrong\u003ePads, bedding and ring replacement\u003c\/strong\u003e\u003c\/summary\u003e\n  \u003cp\u003eThe rear disc on these cars is thin from new; at 20.0 mm it is done. Do not resurface it — there is not enough material left to stay within spec.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e▸ \u003cstrong\u003eLead time\u003c\/strong\u003e\u003c\/summary\u003e\n  \u003cp\u003eBuilt to order. Production takes 10–12 days. Left and right are matched and marked before packing. Transit time depends on destination and service — we confirm shipping and delivery dates by email before you pay.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"ZORVANT","offers":[{"title":"Full-floating","offer_id":51267395420385,"sku":"ZR-T-2041-FL","price":439.0,"currency_code":"USD","in_stock":true},{"title":"Fixed","offer_id":51267395387617,"sku":"ZR-T-2041-FX","price":389.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0864\/1901\/3857\/files\/rotor-floating-2000.png?v=1793682959","url":"https:\/\/zorvantbrake.com\/zh\/products\/audi-rs3-8v-8y-rear-rotor-pair-310-22","provider":"ZORVANT","version":"1.0","type":"link"}