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Tamiya TRF421Car by Tamiya Setups |
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![Tamiya TRF421](javascript:showProduct({"id":11774,"picture":null,"specification":null,"notes":null,"user_id":8903,"product_id":1889,"userproduct_id":null,"order":1000,"quantity":null,"aquired":"2024-06-01T00:00:00.000000Z","created_at":"2024-06-05T01:08:20.000000Z","updated_at":"2024-06-05T01:08:20.000000Z","status_id":null,"product":{"id":1889,"name":"TRF421","shortname":null,"fullname":"Tamiya TRF421","description":"This R\/C model assembly kit creates the 2 belt-driven 4WD TRF421, the latest model in the line of TRF (Tamiya Racing Factory) chassis, which offers a plethora of setup options and easier pit work.\u00a0Its motor has been moved into an almost central position and drive belts are of equal size, contributing to greater pitching stability on the throttle. A choice of one- and two-piece versions of the upper deck lets you fine-tune your setup, and the refined drivetrain uses a front direct coupling and rear oil-filled gear differential. The suspension uses upper and lower A arms, with the latter employing ball connector mounts; new USBB (ultra-short big bore) dampers are mounted via aluminum stays, and can be further fine-tuned with spacers. A total of four stabilizers (three thicknesses: 1.0mm x1, 1.1mm x2, 1.2mm x1) is included, and countless parts across the chassis have been updated. \r\n \r\n**Featured Components** \r\n\u26052.25mm carbon fiber lower deck \u26052.0mm carbon fiber upper deck (1-piece \u0026 2-piece designs included) \u2605Aluminum damper stays \u26052.0mm carbon fiber bumper support \u2605Aluminum upper \u0026 lower bulkheads \u2605Aluminum motor mount \u2605Aluminum servo mount \u2605Aluminum steering bridge \u2605Front direct coupling \u0026 double cardan drive shafts \u2605Rear oil-filled gear differential \u0026 lightweight universal shafts (45mm drive shafts) \u2605USBB dampers \u2605Precision stabilizers \u2605Aluminum bearing holders \u2605Rubber sealed ball bearings \r\n \r\n**Specifications** \r\n\u2605Length: 397mm (not including body) \u2605Width: 187mm \u2605Wheelbase: 257mm \u2605Double deck frame (carbon fiber 2.25mm lower and 2.0mm upper decks; 1- \u0026 2-piece upper decks included) \u2605Transverse motor \u0026 2-belt driven 4WD \u2605Front direct coupling \u2605Rear oil-filled gear differential \u26053-piece steering tie-rod \u26054-wheel independent double wishbone suspension \u2605USBB dampers \u2605Contact your local Tamiya Agent regarding the ESC. \r\n \r\n**Separately Required Items** \r\n\u2605Body \u2605Brushless motor \u2605Wheels \u2605Tires \u26052-channel R\/C system w\/ESC \u2605R6\/AA\/UM3 batteries for transmitter \u2605Battery pack \u0026 charger\r\n\r\n \r\n\u00a0\r\n\r\n\r\n\r\nA close-up on the three-piece steering setup. Three varieties of spacer let you fine-tune steering range. \r\n\u00a0\r\n\r\n\r\n\r\nBoth upper and lower front arms are A-shaped. Choose from three caster angle setups and three damper lower pivot positions. \r\n\u00a0\r\n\r\n\r\n\r\nUSBB (ultra-short big bore) dampers help lower the center of gravity. Dedicated double-cardan joint drive shafts are employed. \r\n\u00a0\r\n\r\n\r\n\r\nA-arms are also used top and bottom on the rear. Long lower arms spans help the car maintain form through corners. Drive shafts and wheel axles are new. \r\n\u00a0\r\n\r\n\r\n\r\nThe chassis has aluminum damper stays. Fine-tune your setup with different spacers. \r\n\u00a0\r\n\r\n\r\n\r\nPositioned under the drive shaft to ease maintenance, a choice of stabilizers is included: 1.0mm x1, 1.1mm x2 and 1.2mm x1. \r\n\u00a0\r\n\r\n\r\n\r\nThe motor is virtually dead center, letting the TRF421 use equal-length drive belts for greater pitching stability on the throttle. \r\n\u00a0\r\n\r\n\r\n\r\nSecured with a single nut, the spur gear can be removed swiftly. \r\n\u00a0\r\n\r\n\r\n\r\nThe 2.25mm carbon fiber lower deck is slimmer than that of the TRF420, enabling more stroke under roll and improving traction and stability. \r\n\u00a0\r\n\r\n\r\n\r\nA choice of 1- and 2-piece 2.0mm carbon fiber upper decks is included. Alter screw positions to affect roll. \r\n\u00a0\r\n\r\n\r\n\r\nBattery holders allow swift access, and are compatible with a range of battery packs. \r\n\u00a0\r\n\r\n\r\n\r\nHorizontal rear mounts help alleviate body wobble.","picture":"images\/28460\/conversions\/42384_1-preview.jpg","url":"https:\/\/www.tamiya.com\/english\/products\/42384\/index.html","organization_id":62,"user_id":1716,"user_is_owner":0,"type_id":"car","year":2024,"created_at":"2024-02-01T01:19:37.000000Z","updated_at":"2025-06-24T01:19:49.000000Z","interactivity_id":null,"status_id":"live","url2":null,"type":{"id":"car","name":"Car","shortname":null,"description":"Car","config":null,"filter":"cars","icon":"directions_car","color":null,"default":0,"disabled":0,"order":1,"type_id":"product","created_at":"2019-10-31T23:45:39.000000Z","updated_at":"2020-10-23T17:47:55.000000Z"}}}, "https://houseofrc.com/setups?user_id=8903&product_id=1889&userproduct_id=11774", "https://houseofrc.com/users?product_id=1889")){kind=link}