{"product_id":"ap-racing-world-radi-cal-1-4-piston-caliper-cp8540-390mm-disc","title":"AP Racing World Radi-CAL 1 4-Piston Caliper CP8540 (Ø390mm Disc)","description":"\u003cp\u003eA four-piston World Radi-CAL 1 caliper from AP Racing for performance road cars (front): a forged two-piece aluminium body with aluminium pistons, radial mounting on 195mm centres and discs up to Ø390mm, 28mm or 32mm thick. Sold per caliper in black, red, yellow or white, right or left hand, trailing or leading.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4 pistons (Ø28.6mm and Ø31.8mm), 28.8cm² piston area\u003c\/li\u003e\n\u003cli\u003eForged two-piece aluminium body, aluminium pistons\u003c\/li\u003e\n\u003cli\u003eRadial mount, 195mm centres\u003c\/li\u003e\n\u003cli\u003eDiscs up to Ø390mm, 28mm or 32mm thick\u003c\/li\u003e\n\u003cli\u003eBlack, red, yellow or white paint finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCheck before you order\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePriced per caliper: one axle needs a right-hand and a left-hand caliper.\u003c\/li\u003e\n\u003cli\u003eThis is the caliper on its own: discs and mounting brackets are not included.\u003c\/li\u003e\n\u003cli\u003eTrailing calipers sit behind the axle, leading calipers in front of it: choose the handing that matches where the caliper mounts on your car.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable class=\"spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePart numbers\u003c\/th\u003e\n\u003ctd\u003eCP8540-[2-9]S0 + colour: -2 RHT, -3 LHT, -4 RHL, -5 LHL for 28mm discs; -6 RHT, -7 LHT, -8 RHL, -9 LHL for 32mm discs; colour BG black, R2 red, Y23 yellow, W1 white (e.g. CP8540-2S0BG)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003ctd\u003eWorld Radi-CAL 1 (WR1), 4-piston\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePiston sizes\u003c\/th\u003e\n\u003ctd\u003eØ28.6mm and Ø31.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePiston area\u003c\/th\u003e\n\u003ctd\u003e28.8cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUse\u003c\/th\u003e\n\u003ctd\u003ePerformance road, front; AP Racing's factory Radi-CAL brake kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFront axle, gross vehicle weight up to\u003c\/th\u003e\n\u003ctd\u003e1,380kg (front-engined car) \/ 1,600kg (rear-engined car)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBody\u003c\/th\u003e\n\u003ctd\u003eForged two-piece aluminium alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePistons\u003c\/th\u003e\n\u003ctd\u003eAluminium alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eRadial, 195mm centres\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiscs\u003c\/th\u003e\n\u003ctd\u003eUp to Ø390mm, 28mm or 32mm thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisc thickness by part number\u003c\/th\u003e\n\u003ctd\u003eCP8540-2 to -5: 28mm; CP8540-6 to -9: 32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting offset\u003c\/th\u003e\n\u003ctd\u003e34.0mm (28mm disc) \/ 36.0mm (32mm disc)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting hole\u003c\/th\u003e\n\u003ctd\u003e12.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e'PL' dimension\u003c\/th\u003e\n\u003ctd\u003e55.0mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (no pads)\u003c\/th\u003e\n\u003ctd\u003e3.35kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHydraulic thread\u003c\/th\u003e\n\u003ctd\u003eM10x1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBleed screw torque\u003c\/th\u003e\n\u003ctd\u003e17Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrake pad\u003c\/th\u003e\n\u003ctd\u003eCP6600D55: area 64.6cm², depth 55.0mm, thickness 16.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeals\u003c\/th\u003e\n\u003ctd\u003eBoot-type dirt seals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePad clip\u003c\/th\u003e\n\u003ctd\u003ePad anti-rattle clip fitted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePaint finish\u003c\/th\u003e\n\u003ctd\u003eBlack (BG), red (R2), yellow (Y23) or white (W1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeal repair kit\u003c\/th\u003e\n\u003ctd\u003eCP4527-DE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpare pistons\u003c\/th\u003e\n\u003ctd\u003eØ28.6mm CP8336-111, Ø31.8mm CP8336-116\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiscs AP Racing list to suit\u003c\/th\u003e\n\u003ctd\u003e28mm: Ø356x28mm CP6565-182CG12 \/ -183CG12; Ø360x28mm CP6565-198GA \/ -199GA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlso to suit\u003c\/th\u003e\n\u003ctd\u003e28mm: Ø380x28mm CP5914-484CG12 \/ -485CG12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlso to suit\u003c\/th\u003e\n\u003ctd\u003e32mm: Ø356x32mm CP7177-110G8 \/ -111G8; Ø362x32mm CP4542-112CG12 \/ -113CG12; Ø380x32mm CP5914-188GA \/ -189GA; Ø390x32mm CP7177-130CG12 \/ -131CG12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart number 'S0'\u003c\/th\u003e\n\u003ctd\u003eS0 in the part number: side feed inlet, no anti-knockback spring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eFitting notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBleed screws must be at the top.\u003c\/li\u003e\n\u003cli\u003eThe disc must pass the smaller piston first (differential bore calipers).\u003c\/li\u003e\n\u003cli\u003eAP Racing say brake parts should only be fitted by people experienced in fitting disc brake systems.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AP Racing","offers":[{"title":"Black \/ Right hand trailing (RHT) \/ 28mm disc","offer_id":57769639969148,"sku":"CP8540-2S0BG","price":602.39,"currency_code":"GBP","in_stock":true},{"title":"Red \/ Right hand trailing (RHT) \/ 28mm 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