2025 R1T range drop question

[stubbo]

I’ve owned a R1T for 2 years now the first year with 22” Pirellis a full charge was close to 270. I replaced the tire with 22” Pirelli XTM AT and over time the full charge range has decreased to 234. Yesterday I had 10% charge remaining about 2.5 miles from home and it went from 10% to 0% and died within a quarter mile from home. It was SUDDEN and Dangerous. Any additional info would help. Wondering if the XTM AT tires are that much of a difference. Thanks in advance

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[CANCERDOC]

If you have the standard Lithium iron phosphate (LFP) pack, there is a calibration issue where it may not report accurate range below 20%. Rivian issued instructions to all owners of gen2 standard pack to charge fully a few times to calibrate the BMS.