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Went on an 1700 mile road trip, ran like a champ the entire time. It averaged 31mpg the entire trip and got up to 33 in Wyoming where there is 91 octane w/ no ethanol.
Turns out I also need new tires because the stock camber eats tires from the inside.
Turns out I also need new tires because the stock camber eats tires from the inside.
I have a 2008 IS250 that was eating front tires on the inside. The suspension setup is near identical to our GS's. What causes it is the lower control arm rear bushing is very soft as to give a supple ride. The side effect of this is that every time you brake it allows the suspension arm to tilt back. The steering rack is in front of the suspension and the tie rod ends are angled slightly forward to where they connect to the knuckles. When you brake and the suspension arm tilts backward the tie rod moves backwards with it. Because the steering rack is positioned slightly rear of where the tie rod connects to the knuckle, as the tie rod moves backward with the suspension arm it also pushes the tires outward on both sides like this \ / which causes a lot of wear on the very inner portion of the tire. What I did on my IS250 is swap out those LCA bushings with much stiffer ones made for the Lexus RC-F. The ride is not as smooth and you can feel a lot of imperfections in the road but my tires are no longer wearing out at the inside edge.
I have a 2008 IS250 that was eating front tires on the inside. The suspension setup is near identical to our GS's. What causes it is the lower control arm rear bushing is very soft as to give a supple ride. The side effect of this is that every time you brake it allows the suspension arm to tilt back. The steering rack is in front of the suspension and the tie rod ends are angled slightly forward to where they connect to the knuckles. When you brake and the suspension arm tilts backward the tie rod moves backwards with it. Because the steering rack is positioned slightly rear of where the tie rod connects to the knuckle, as the tie rod moves backward with the suspension arm it also pushes the tires outward on both sides like this \ / which causes a lot of wear on the very inner portion of the tire. What I did on my IS250 is swap out those LCA bushings with much stiffer ones made for the Lexus RC-F. The ride is not as smooth and you can feel a lot of imperfections in the road but my tires are no longer wearing out at the inside edge.
Unfortunately your explanation supports just the opposite, wheels positioned like this \ / wear on the outside of the tires.
Unfortunately your explanation supports just the opposite, wheels positioned like this \ / wear on the outside of the tires.
The tires deflect toe out, so the \ / image is correct and meant to be looked at as the tires from above, looking down on the car, not head on showing what would be positive camber. I've been researching the bushings also for performance/tire wear reasons
The tires deflect toe out, so the \ / image is correct and meant to be looked at as the tires from above, looking down on the car, not head on showing what would be positive camber. I've been researching the bushings also for performance/tire wear reasons
With toe in and out sometimes you will notice that besides the tires wearing too fast the tread blocks will have extra rubber on one of the edges depending on which way they are getting dragged
Yeah I dont think the OP didn't say it was toe so anyone would probably guess it was camber at first look. I had just been researching which bushings to get to help with that inner wear, seems like Figs are the best for a performance, comfort, and tire saving aspect.
Right now I'm making up for cheating on her yesterday with the GS F..... I've been so busy this summer she's been getting trips through the brushless. First soak with the foam canon.
06-15-21, 06:53 AM
