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Why does Tesla recommend a 40% speed offset?

Beetlebug62

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I generally like to drive 8-10mph above the speed limit. I don't slow people down, and I don't get tickets.

In general, I've used 20% as my speed offset in my 2018 Model 3 and now my 2025 Cybertruck. But, as everyone has experienced, the truck doesn't seem to want to get close to the max speed.

So, this past week, I tried 40% for the first time, and drove 300mi to Boston and back, and it drove far closer to the speeds I prefer. Why? Dunno, but I'll keep it there but keep an eye on it, to make sure I'm not going 10+mph over the limit.

Edit: I forgot to add that I didn't have any left rumble strip riding, though I did run on the yellow line once. However, I did try to avoid driving in the left lane on the highway, to minimize any potential for running off to the rumble strip, since there's often little room for error in driving around Boston.

One way to manage it, is to flick between chill mode and standard. In standard, FSD was passing people on both left and right sides, and getting close to my preferred 10mph above the speed limit; while in chill mode, it would immediately switch into the right lane and go a little slower. I found it interesting. It really was chill. I had not noticed such a clear difference in the past. Was it the 40% offset? Was it a software update? Was it because I wasn't paying attention to it? Dunno.

And, just to add, I was in Boston to see my favorite band growing up, The Who; in my favorite sports venue, Fenway Park, sitting under the iconic Green Monster. How much better is that? As the Who's tour has just begun, I highly recommend it to any fans. It's well worth seeing the band one last time, as Roger and Pete were in great form. Pete's playing was as good as ever. He has a younger brother, Simon, who sounds just like him, playing rhythm guitar. And Roger was amazing. Unlike most other singers in their 80s, Roger didn't need autotune or to drop a key when singing. The guy is incredible.
Tesla Cybertruck Why does Tesla recommend a 40% speed offset? IMG_2481
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atk0506

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I generally like to drive 8-10mph above the speed limit. I don't slow people down, and I don't get tickets.

In general, I've used 20% as my speed offset in my 2018 Model 3 and now my 2025 Cybertruck. But, as everyone has experienced, the truck doesn't seem to want to get close to the max speed.

So, this past week, I tried 40% for the first time, and drove 300mi to Boston and back, and it drove far closer to the speeds I prefer. Why? Dunno, but I'll keep it there but keep an eye on it, to make sure I'm not going 10+mph over the limit.
40% is just giving FSD the buffer room to drive as it needs to instead of limiting it
 
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freyguy

freyguy

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I’ll try 40 percent again after the next update. I’m still not completely convinced about the staying in lane. My model y on FSD rode perfectly in the middle. My truck rides lines and gets super close … I mean extremely sketchy close to median highway barriers. No thanks
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