{"product_id":"tws-t66-f-forged-wheel-set-bmw-f-series-m","title":"TWS T66-F Forged Wheel Set – BMW F-Series M Cars","description":"\u003cp\u003e\u003cstrong\u003eTWS Motorsport T66-F forged wheels for BMW F-series M cars\u003c\/strong\u003e combine an exceptionally low wheel weight with a one-piece forged construction and motorsport-focused details throughout.\u003c\/p\u003e\n\u003cp\u003eThis limited BMW specification uses a staggered \u003cstrong\u003e18x10 ET25 front\u003c\/strong\u003e and \u003cstrong\u003e18x11 ET44 rear\u003c\/strong\u003e setup. The front wheel is approximately \u003cstrong\u003e8.15 kg\u003c\/strong\u003e and the rear approximately \u003cstrong\u003e8.19 kg\u003c\/strong\u003e. Price is for a complete set of four wheels.\u003c\/p\u003e\n\u003cp\u003eThe T66-F sits within the TWS Motorsport range and is designed around reducing unnecessary mass while retaining the rigidity, strength and brake clearance required for demanding road and circuit use. This particular F-series BMW M fitment was commissioned as a very limited custom run; Chalk Motorsport states that only five sets were produced in this specification.\u003c\/p\u003e\n\n\u003ch2\u003eBMW F-series M specification\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront:\u003c\/strong\u003e 18x10 ET25 – approximately 8.15 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear:\u003c\/strong\u003e 18x11 ET44 – approximately 8.19 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCD:\u003c\/strong\u003e 5x120\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e one-piece forged aluminium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e TWS 6T66 forged alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColours:\u003c\/strong\u003e Gloss Gold, Gloss Black, Gloss Silver or Gloss Bronze\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDesigned for low weight without giving up strength\u003c\/h2\u003e\n\u003cp\u003eTWS describes the T66-F as an ultra-lightweight forged wheel developed to remove mass while maintaining rigidity. The wheel is forged as a one-piece 6T66 aluminium construction and uses a number of additional machining processes to remove material only where it is not required structurally.\u003c\/p\u003e\n\u003cp\u003eFor this 18-inch BMW specification, that results in a 10-inch front wheel at approximately 8.15 kg and an 11-inch rear wheel at approximately 8.19 kg. That is particularly relevant on track-focused BMWs where reducing unsprung and rotating mass can improve suspension response and reduce rotational inertia.\u003c\/p\u003e\n\n\u003ch2\u003eForged under 8,000 tonnes of pressure\u003c\/h2\u003e\n\u003cp\u003eThe TWS forging process starts with a solid aluminium billet. Chalk Motorsport describes the material as being formed under approximately \u003cstrong\u003e8,000 tonnes of pressure\u003c\/strong\u003e, producing a dense and aligned grain structure through the wheel rather than relying on a cast structure.\u003c\/p\u003e\n\u003cp\u003eTWS also uses motorsport-focused forged blanks developed around the intended wheel application. This gives the design more freedom around spoke profile, concavity and brake clearance before the final wheel is CNC machined.\u003c\/p\u003e\n\n\u003ch2\u003eSide-milled spokes and barrels\u003c\/h2\u003e\n\u003cp\u003eThe T66-F uses extensive side milling across the spokes and barrel. A precision CNC process removes material from areas that do not contribute meaningful strength, allowing TWS to reduce wheel mass without simply making the entire spoke or barrel thinner.\u003c\/p\u003e\n\u003cp\u003eThe machining is visible throughout the wheel and is one of the key reasons the T66-F can achieve such low quoted weights at 18x10 and 18x11 sizes.\u003c\/p\u003e\n\n\u003ch2\u003eTyre security and bead-seat design\u003c\/h2\u003e\n\u003cp\u003eThe T66-F uses non-slip processing and \u003cstrong\u003epaintless knurled bead seats\u003c\/strong\u003e. Under repeated hard acceleration and braking, a tyre can move slightly around the wheel bead and disturb the original balance position. Leaving the knurled area unpainted keeps the surface sharp and helps resist that movement.\u003c\/p\u003e\n\n\u003ch2\u003eBack-spring machining and hub contact\u003c\/h2\u003e\n\u003cp\u003eThe rear mounting face uses TWS back-spring processing to improve contact between the wheel and hub. This is another detail aimed at maintaining a consistent, secure mounting surface under demanding use.\u003c\/p\u003e\n\n\u003ch2\u003eBrake and wheel-hardware clearance\u003c\/h2\u003e\n\u003cp\u003eThe T66-F is designed with substantial brake-caliper clearance and practical access around the wheel fixings. TWS\/Chalk quote approximately \u003cstrong\u003e32 mm socket-diameter clearance\u003c\/strong\u003e, allowing normal workshop and impact-socket access rather than requiring unusually small wheel hardware.\u003c\/p\u003e\n\u003cp\u003eThe wheels are compatible with OEM mounting hardware, suitable aftermarket wheel bolts and stud-conversion systems. Brake clearance can still vary by caliper, disc and vehicle specification, so please contact us before ordering if the car uses a non-standard brake package.\u003c\/p\u003e\n\n\u003ch2\u003eLaser-engraved specification\u003c\/h2\u003e\n\u003cp\u003eTWS laser engraves the wheel specification on the barrel. The T66-F is also independently tested and certified to \u003cstrong\u003eJWL \/ VIA\u003c\/strong\u003e standards.\u003c\/p\u003e\n\n\u003ch2\u003eTPMS and valve compatibility\u003c\/h2\u003e\n\u003cp\u003eThe wheels accept OEM and aftermarket tyre-pressure monitoring sensors and standard-fit valve stems. If you are changing tyre specification or adding TPMS at the same time, we can advise on the complete wheel and tyre package.\u003c\/p\u003e\n\n\u003ch2\u003eBMW fitment\u003c\/h2\u003e\n\u003cp\u003eThis specification is offered for BMW F-series M applications including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBMW F87 M2\u003c\/li\u003e\n\u003cli\u003eBMW F87 M2 Competition\u003c\/li\u003e\n\u003cli\u003eBMW F87 M2 CS\u003c\/li\u003e\n\u003cli\u003eBMW F80 M3 \/ M3 Competition \/ M3 CS\u003c\/li\u003e\n\u003cli\u003eBMW F82 M4 \/ M4 Competition \/ M4 CS \/ M4 GTS\u003c\/li\u003e\n\u003cli\u003eBMW F83 M4 \/ M4 Competition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWheel and tyre clearance varies with tyre choice, ride height, suspension setup, brake package and alignment. If the car is lowered, uses a non-standard brake package or is intended for track use, we recommend confirming the complete specification with us before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable colours\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eGloss Gold (GG)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGloss Black (GBL)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGloss Silver (GS)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGloss Bronze (GBR)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe main gallery includes photography of the limited F-series colour set together with additional T66-F detail, standard-colour reference and manufacturing photography.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty\u003c\/h2\u003e\n\u003cp\u003eTWS Forged wheels are supplied with a \u003cstrong\u003elifetime structural warranty\u003c\/strong\u003e against defects in workmanship and materials, together with a \u003cstrong\u003eone-year finish warranty\u003c\/strong\u003e, subject to the manufacturer's warranty terms.\u003c\/p\u003e\n\n\u003ch2\u003eSupply, tyres and setup\u003c\/h2\u003e\n\u003cp\u003eSwift Performance can supply the wheel set on its own or advise on tyre sizing around the way the car is used. We can also provide tyre fitting and balancing, TPMS installation and four-wheel geometry where required.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eIs the price for one wheel or a complete set?\u003c\/h3\u003e\n\u003cp\u003eThis listing is for a complete staggered set of four wheels: two 18x10 ET25 fronts and two 18x11 ET44 rears.\u003c\/p\u003e\n\u003ch3\u003eAre these forged or flow-formed?\u003c\/h3\u003e\n\u003cp\u003eThe T66-F is a one-piece forged aluminium wheel using TWS 6T66 material.\u003c\/p\u003e\n\u003ch3\u003eCan I use the factory wheel hardware?\u003c\/h3\u003e\n\u003cp\u003eYes. TWS states that the wheels are compatible with OEM mounting hardware as well as suitable aftermarket bolts and stud-conversion systems.\u003c\/p\u003e\n\u003ch3\u003eCan I retain TPMS?\u003c\/h3\u003e\n\u003cp\u003eYes. OEM and aftermarket TPMS sensors can be fitted.\u003c\/p\u003e\n\u003ch3\u003eWill they clear my brakes?\u003c\/h3\u003e\n\u003cp\u003eThe T66-F is designed around substantial caliper clearance, but exact clearance depends on the brake package. Contact us with the vehicle and brake specification if you would like this confirmed before ordering.\u003c\/p\u003e","brand":"TWS Forged","offers":[{"title":"Gloss Black","offer_id":57412608917879,"sku":null,"price":3650.0,"currency_code":"GBP","in_stock":true},{"title":"Gloss Gold","offer_id":57412608950647,"sku":null,"price":3650.0,"currency_code":"GBP","in_stock":true},{"title":"Gloss Silver","offer_id":57412608983415,"sku":null,"price":3650.0,"currency_code":"GBP","in_stock":true},{"title":"Gloss Bronze","offer_id":57412609016183,"sku":null,"price":3650.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/8489\/7720\/files\/image0_5744e9d6-8686-4e0a-8f75-233ce5721d83.jpg?v=1787825757","url":"https:\/\/swiftperformance.co.uk\/products\/tws-t66-f-forged-wheel-set-bmw-f-series-m","provider":"Swift Performance","version":"1.0","type":"link"}