Recent content by ksurfier

Question- The time elapsed for this test shows as 3:51, does this mean actual speed was ~66 mph (not 70)?

Can someone help a fellow idiot out? Why is the maths not mathing?!?

Try the search option in top right corner, there's lot's of info, I believe there are some really good options available...maybe someone who's done it recently will chime in...

When will RivianTracker get updated numbers? Real-world data should show the ~7% lead that the 21" tires have, so we can expect the long term delta to be something like the following: 20" @2.75 MPK | 21" @2.94 MPK 20" @2.8 MPK | 21" @3.0 MPK 20" @3.0 MPK | 21" @3.2 MPK Right now it's: 20"...

Yes, I’ve been using AI to help organize and analyze the data. There are enough scattered results now that it’s pretty useful for spotting correlations, separating variables like speed and elevation, and comparing datasets. It also saves me from spending eight hours a day staring at documents...

That’s interesting, the long Roamer trips where average speed can be calculated, efficiency falls very consistently as speed increases: roughly 3.31 mi/kWh at 54 mph, 3.06 at 59 mph, 2.85 around 61 mph, and ~2.74 at 70–72 mph. Excluding one obvious low-efficiency outlier, the speed/efficiency...

Update: The R2 efficiency data are becoming increasingly consistent across two independent lines of evidence. The Rivian Roamer fleet now includes 93 vehicles and more than 61,000 miles, with the 20-inch BFG group averaging 2.75 mi/kWh versus 2.68 mi/kWh for the 21-inch Pirelli group, a roughly...

Dash is off by 2 mph (reads 62 but actual speed measured by gps is 60), this is well established here and I confirmed during test drive that R2 also shows the same offset…

Something seems off, we get long range 70 mph testing that return ~2.7 MPK, but then there are apparent outliers of 3.3 MPK…I think the Model Y is prob. ~3.4-3.5 MPK at 70 mph… This is a big difference, 290 miles range at 70 mph or less than 240 miles…my own tests have yielded the following: 70...

That’s the dash (or GPS actual)? Is your average significantly higher than 2.7 MPK?

All true, and newest wrinkle is that the 20” setup is trending towards 2.8 MPK and 21” setup is slightly lower, around ~2.7 MPK…it’s also not 100% clear if R2 is 2.7, 2.8, or >3.0 MPK at 70 mph, my best guess is 2.8 - 2.9 or so…

Have you got a good idea yet what your range at 70 mph is?

What’s your current average, significantly higher than 2.7 MPK?

Gap is closing a bit…. (https://rivianroamer.com/guides/tire-efficiency?platform=r2)

Most likely cause: