I've got a 2021 is300, have put on 20k-ish kms onto her and not noticed any tire wear challenges thus far.

I've read that the 2021-present models have had the inner Tire wear issue rectified, I've also read that some people have still had issues. Just curious if anyone with a 2021+ has needed to update bushings etc due to inner wear. Maybe I'm lucky, so far 🤞

 

That is a good question. I had my 2021 IS 350 for about 1.5 years and put 17000+ miles on it. In that time, I did not see any sign of inner tire wear. But, I am just one owner. I would love to read about what other folks have seen.

 

There has not been a resolution to the inner tire wear problem from Lexus. The lower control arm bushings are the same on 2006+ V6 cars. The issue is that the lower control arm is mounted in a soft rubber bushing that allows the control arm to deflect laterally and axially. When the car brakes hard you get tow and wondering which contributes to the inner tire wear.

Our lower control arm bushings resolve this with a harder durometer bushing and a pre load thrust washer. Without these two things, it will not resolve the issues people have. If you are not experiencing inner tire wear then you could be one of the lucky ones. Not everyone gets it. But having the new LCA bushings will prevent you from getting it in the future along with improving steering feedback. Small price to pay for a lot of benefit.

-Justin
RR Racing | Sales

 

​​​​​​​With increased NVH

 

I have some rear inner wear at 16k ('21 IS350) but the fronts look ok so far. I'll be watching both.

 

I have a 21 f sport and I just recently put some figs on and it made the shaking while braking go away I did notice the inner was for sure worn more than the outer. It rides a little harsher over bumps but way better than spending money for new tires all the time!

 

Sold me, en-route with FedEx 🙏

 

How much harsher?

I posed this question over at the RC-F forum, and they're convinced it's undetectable and doesn't exist in the first place.

 

It’s a subtle change, and a mind game (“I felt that, was that due to the bushings?”). For the first few drives, you’re senses are heighten, and you keep trying to notice it, but after awhile you just forget about it, and everything feels “normal”.

 

not much though. you do feel the difference of subtle vibration and "harshness" at first but you'll also notice the steering enhancement (as a pro vs con) as well.

 

the figs doesn't have the pre-load washer the RR Racing USRS does. the figs is just a little more stiff than the RCF/GSF lca bushings

 

I feel like if I were to do this, it would make more sense to get the rubber RC-F option. I care more about "can I feel steering wheel vibration" on a 250 mile road trip rather than whether or not I'll have to chuck my tires prematurely.

 

What sold me on the harder bushings, was emergency stops or slow downs (i.e. you’re doing 85 on the interstate, about to pass a line of slower traffic, when some yahoo pulls out from that line without looking for traffic coming up from their rear, and you need to rapidly decelerate). With the original bushings the car would dangerously wander, with the FIGS the car stays straight as an arrow.
I bought a set of the RCF/GSF bushings after I installed the FIGS, just in case I was unhappy with vibration, but after experiencing the improved handling with the FIGS, I’m not going back to a softer bushing.

 

@RRRacing maybe I am misinterpreting the graphic or the product page, but the graphic says R&T version has 90D bushing, whereas the product page says "Extremely tough 95A durometer polyurethane bushing". Please correct me if I'm wrong. Also, I see no mention on the product page of greasing this bushing. Is it recommended that we grease them like the FIGS, and if so, how often and what grease do you recommend? I have a 2022 IS350 DHP and the only thing I hate about the car is that when I brake hard, the car goes on a little field trip wandering all over the pavement. Fortunately I do not have front inner tire wear so my intent is not so much to address that common issue, but rather that wandering. I do however have rear inner tire wear which my Lexus dealer basically told me is unfixable with stock parts since the rear camber arms aren't adjustable and the factory spec calls for negative camber in the rear. But alas I digress. I have been holding out on swapping LCA bushings because I am not entirely sold on having to grease the bushing constantly. I assume if it needs to be greased, I'd basically have the remove the bolt, grease the bolt, reinstall, and align it once again? Please excuse my noobness. Thank you.

 

Hmm. I've never had that experience. Although, I'm running Michelin PS4S with aftermarket brake pads.