Michelin
Defender LTX M/S2
275/55R21 · 32.9"
Fits R1
All-Season
An all-season tire that fits the R1, around $405 per tire ($1,620 a set), returning 2.22 mi/kWh across 35 owner vehicles on Rivian Roamer.
Real-world efficiency
2.22 mi/kWh
234,811 mi tracked · 35 vehicles
Average price
$405
per tire · $1,620 / set of 4
Mileage warranty
70,000
miles
Load index
116
R1 minimum is 116
Specifications
Size & Fitment
Size
275/55R21 (32.9")
Load Index
116
Load Range
XL
Max Load
2,756 lb
Speed Rating
H (130)
Max PSI
50
Construction & Performance
Category
All-Season
Weight
39.0 lb
Tread Depth
11/32
UTQG
820 B A
3PMS Rated
No
Mileage Warranty
70,000 miles
Other sizes of this tire
Michelin Defender LTX M/S2
255/65R19 · $299 · No efficiency data
Fits R2
Michelin Defender LTX M/S2
255/70R18 · $279 · No efficiency data
Fits R2 · 3rd-party wheels
Michelin Defender LTX M/S2
275/50R22 · $343 · 2.12 mi/kWh
Fits R1
Michelin Defender LTX M/S2
305/45R22 · $358 · No efficiency data
Fits R1
Michelin Defender LTX M/S2
255/60R20 · $349 · 2.72 mi/kWh
Fits R2
Michelin Defender LTX M/S2
275/60R20 · $323 · 2.17 mi/kWh
Fits R1
Michelin Defender LTX M/S2
275/65R20 · $378 · 2.16 mi/kWh
Fits R1
Similar tires in 275/55R21
Best real-world efficiency first.
Owner Reviews (10)
AK
Sep 2026
★★★★★Rated 5 out of 5
Verified ownerR1S40,000 mi on this set
Still running on these, 40k miles later
No impact to range in the 1.5 years of driving wirh these tires. No pbservable difference in grip but road noise is slightly lower compared to the stock Pierllis, but not by much.
CryThief
Sep 2026
★★★★★Rated 5 out of 5
Verified ownerR1T24,000 mi on this set
Best truck tire I've ever had
I have nothing but good things to say about these. The efficiency is great for me. Handling is almost as good as stock Pirellis, wet grip is great. Handles light snow with ease. Quiet on highway and around town. At 24k miles they are almost brand new. New they are 11/32, all of mine are 9.5/32 -10/32.
David Geller
Sep 2026
★★★★★Rated 5 out of 5
Verified ownerR1S
Not many choices
There aren’t many choices in this size, so it was an easy choice. But, it’s one that was met with a great tire that, frankly, felt better and more capable than the stock ones that came from Rivian. Very happy with the ride quality and noise. Would recommend and will likely buy them again at some point.
Vipul
Sep 2026
★★★★★Rated 5 out of 5
Verified ownerR1T21,891 mi on this set
Good tire for the price
Replaced the Pirelli Scorpions which wore out at 18,000 miles.
Have not noticed any performance degradation in terms of battery efficiency or road noise. Great tires for the price. They look good also.
Gordon Lewis
Aug 2026
★★★★★Rated 5 out of 5
Quitter than stock
I got 24K out the OEM Pirellis. The Michelins are noticeably quitter. Now I can only hear all the wind noise from my early build.
Tom
Jul 2026
★★★★★Rated 5 out of 5
Better than stock… I like them
I had no real complaints about stock Pirellis on my 21s but needed to replace mine after a nail in the sidewall. I went with Michelins (from Costco) because I had good experience with Michelins on previous vehicles. So far (3k miles), I am happy with the switch. Thanks to Rivian Roamer, I can see my efficiency is a little bit better… 2.08 mi/kWh on average vs 2.00 for the Pirellis. I think they are quieter, too. They were less expensive, which makes them a winner in my book.
Ron Peterson
Mar 2026
★★★★★Rated 5 out of 5
Great tire
Alex
Feb 2026
★★★★★Rated 4 out of 5
Solid upgrade
Really nice all weather performance and Ive noticed really consistent performance on conserve mode on the highway. Has handled snow and ice with superior confidence compared to my previous stock perellis. They are a slight bit louder in terms of tire noise but not to a dramatic degree in most scenarios. More noticeable on gravel or poorly build roads but they have better traction and road feel. Got them at costco and rotations/balancing is included. Ive had them about 10k miles and they are not wearing out to the ridiculous degree thst the perellis were. In terms of range, im getting a consistent 300 miles with full charge in average weather.
brycewilliam
Nov 2025
★★★★★Rated 1 out of 5
azampatti
Oct 2025
★★★★★Rated 5 out of 5
$405 ea
$1,620 / set of 4
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