The Lexus RX is a five-seat large SUV with a 2/3 seating configuration. Up front, there are eight-way powered seats with heating and lumbar support, but higher grades enjoy further comforts and adjustments.
The rear seats are set in a stadium-style layout with a 40/20/40 split and offer long seat bases, thick padding, and a fold-down armrest with two cupholders. Leather-accented upholstery is standard across the range, while higher grades upgrade to a premium leather and suede finish.
The RX is available in eleven colours but some colours are grade-specific. The colours are White Nova, Sonic Copper, Cobalt Mica, Deep Blue, Sonic Chrome, Graphite Black, Sonic Quartz, Khaki Metal, Titanium, Sonic Iridium, and Vermillion.
The RX’s interior feels premium throughout, with soft-touch materials, leather-accented trims, and a clean, modern layout. The stepped dashboard design is headlined by large, high-resolution displays, giving the cabin a high-tech feel. E-latch door handles add to the streamlined, minimalist aesthetic, and higher grades feature a panoramic sunroof that brings extra light and airiness to the space.
The Lexus RX has a boot space of 612L with the rear seats up, and up to 1678L when the rear seats are folded down. The boot features a shallow underfloor storage compartment, retractable cargo cover, 12-volt socket and a handsfree powered tailgate. The 40/20/40 split on the rear row offers further flexibility for storage.
Apart from the obvious requirement to change to 17-inch wheels as well as your chosen tyre, there are legalities to be considered here, and they can vary from State to Territory, so you need to check with your local authorities before committing to any change like this. However, broadly speaking, you can increase your wheel size by up to two inches, provided you don’t throw your speedometer out in the process. You also need to stay within a certain percentage of the car’s original rolling circumference (the distance the tyre travels in one revolution) to remain legal. And there are the practical issues such as tyre-to-bodywork clearance.
However, on the surface the swap you’ve nominated should be legal and practical. The 2000 Lexus LS400 originally came with a 225 60/16 wheel and tyre, so your preferred option only increases wheel diameter by one inch. Also, by fitting a 55-series tyre, you’ve reduced the sidewall height (from the standard 60-series tyre) so the rolling resistance of your new combination will be less than one per cent larger, so shouldn’t create any legal or clearance hassles. Just be sure to let your insurance company know you’ve made the change. Be sure to check the accuracy of your speedometer after the change, too. A GPS speedo app on your phone is the easiest way to do this.
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The Lexus GX 550 went on sale in Australia in June, 2024.
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LBX stands for 'Lexus Breakthrough Crossover', a name attributed to the LBX's subcompact size but luxury credentials.
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Standard accessories include keyless entry/start, dusk-sensing LED headlights, rain-sensing wipers, 14-inch touchscreen multimedia display, satellite navigation, digital radio, 12-speaker Panasonic sound system, reversing camera, front/rear parking sensors, wireless phone connectivity, USB-C ports, USB-A port, 12-volt socket, Lexus Connected Services app access, three-zone climate control, and a powered tailgate.
The Lexus RX350 has a 2.4L turbo-petrol four-cylinder engine which produces up to 205kW/430Nm.
The Lexus RX350h is a hybrid and pairs a 2.5L turbo-petrol four-cylinder engine with a dual electric motors which produce up to 184kW (combined) but Lexus doesn't quote the combined torque figure.
The Lexus RX450h+ is a plug-in hybrid and pairs a 2.5L turbo-petrol four-cylinder engine with a dual electric motors which produce up to 227kW (combined) but Lexus doesn't quote the combined torque figure.
The Lexus RX500h is a hybrid and pairs a 2.4L turbo-petrol four-cylinder engine with a dual electric motors which produce up to 273kW (combined) but Lexus doesn't quote the combined torque figure.
The RX350h 2WD does 0-100km/h in 8.1sec, the 350h AWD is 7.9sec, while the RX350 is 7.6sec, the RX450h+ does it in 6.5secs and the RX500h Performance hybrid covers the sprint in 6.2sec. Max speeds hover around 180km/h.
The Lexus RX350 has a 67.5L fuel tank and a claimed combined fuel cycle of 8.7L/100km, giving it a theoretical driving range of 775km.
The Lexus RX350h has a 65L fuel tank and a claimed combined fuel cycle of 5.0L/100km for the 2WD and 5.4L/100km for the AWD; giving it a theoretical driving range between 1203 - 1300km.
The Lexus RX450h+ has a 55L fuel tank and a claimed combined fuel cycle of 1.3L/100km. It has a NEDC 65km electric-only driving range.
The Lexus RX350 has a 65L fuel tank and a claimed combined fuel cycle of 6.5L/100km, giving it a theoretical driving range of 1000km.