ksurfier
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Update: A great article that discusses/highlights many tire options:
https://www.autoblog.com/article/besttrucksuvtires/
Highlight: Four high efficiency 275/60R20 tires rise to the top getting ~2.5 MPK:
General Grabber HTS60, Pirelli AS+3, Goodyear Wrangler Territory HT, and Michelin Defender M/S2:
There's a lot of great info spread out across 510 threads here. This post is an effort to condense the info down into one location, links to contributing threads are below:
If you are looking for comparable info on OEM tires, see this thread:
High efficiency 20" wheels and ~34" tires options (R20  285/60  275/65  285/65  295/65)
Below is a list of 275/60R20 Tires that can be grouped into the high efficiency (>2 MPK) and ultra hiE (>2.3 MPK) clubs, organized by weight based on the correlation of low weight and high efficiency (I know, I know, rolling resistenceschmolling resistence...), also note there is a correlation to tread depth and weight:
The tires were also graded primarily based on weight/efficiency, A rating for tires with efficiency above 2.4 MPK. B rating for tires >2.3 MPK and less than 2.4. C rating for tires >2.2 MPK and less than 2.3. D rating for tires >2.1 MPK and less than 2.2. E and F ratings for the heavier tires 2.0 MPK and less...
The following equations describe the relationship between MPK (y, miles per kwh) and Tire Weight (x, pounds):
All Purpose Tire Efficiency = 3.35 MPK  (2.5% of Tire Weight) [Y=3.35X/40]
Conserve Tire Efficiency = 3.7 MPK  (2.5% of Tire Weight) [Y=3.7X/40]
Additional info related to MPK estimates:
Speed has a large impact on efficiency specially over 60 MPH, explained as follows:
2.6 MPK  [SPEED OVER 60]/20; [Y=2.6(x60)/20, where x is speed]
At 70 mph that's 2.1 MPK (2.60.5)
At 80 mph that's 1.6 MPK (2.61.0)
Temperature is another big factor for efficiency as the density of air changes significantly with different temps, a generalized equation describes the change as an increase of 0.1 MPK for every 7 degrees farenheit higher temp.
Elevation will impact efficiency as higher elevations have lower density air, so 2.0 MPK in Denver is equivalent to ~1.7 MPK at sea level.
Given all of these factors, someone in Denver on an 80F day driving 60 MPH in Conserve mode on 33" General Grabber HTS60s might be able to get 3.3 MPK whereas someone at sea level with a heavy AT tire (65#) driving in AP on a 40F day might only get 1.3 MPK. Not a big surprise that most peoples MPK fall somewhere in the middle near ~2.3 MPK due to all the different variables at play.
* Add ~0.3 mi/kwh for Conserve mode; range will increase by ~30 miles or so...Assumes 65 mph, flat terrain, no wind, no cargo/passengers. But friends don't let friends use conserve mode...
**Plus 30 minute supercharge (+60kwh)
20" OEM QM efficiency (EPA): 289 mi / 2.1 mi/kwh
21" OEM QM efficiency (EPA): 321 mi / 2.4 mi/kwh
22" OEM QM efficiency (EPA): 303 mi / 2.2 mi/kwh
My top four choices come mainly from wanting a wider tire, they are in order:
1) General Grabber HTS60 [320 m. Range; 620 AB]  Best efficiency/range and 116 (but only 10/32 tread  ~20k miles expected). Also a A/T tire in XL and D size (65 psi) available. Cost per mile of $0.05 for tires plus $0.15 for electricity. $200 per 1,000 miles operational cost. Wet stopping dist.  140 feet; wet cornering 0.60 GForce. (Photo source: LL75; Rims (32#)  Atomic Wheels AW09  Gloss Black 20x8.5" +48 offset  $2,580.00 [~$2k w/ discount])
2) Pirelli AS+3 [307 m. Range; 800 AA]  Excellent efficiency and UTQG, width and 115 not so great, only 11/32 tread, also only 2025k miles expected. Cost per mile of $0.06 for tires plus $0.16 for electricity. $220 per 1,000 miles operational cost. Wet stopping dist.  132 feet; wet cornering 0.62 GForce. (Photo source: JJE; Rims  OEM 20")
3) Continental TerrainContact H/T [288 m. Range; 720 AA], special note for #3, it's also a high performance tire, rating much higher on wet performance and stopping distance....potentially 30k miles. If you're in a rainy area this is prob. the best choice. Cost per mile of $0.04 for tires plus $0.17 for electricity. $210 per 1,000 miles operational cost. Wet stopping dist.  109 feet; wet cornering 0.70 GForce. (Photo source: DoubleTake; Rims (33#)  EV Sportline Adventure Bronze  20x8.5" +48 offset  $1,995.95)
4) Goodyear Wrangler Territory HT [304 m. Range; 680 AB], only around 25k miles tire life expectancy. Some light off roading is possible with this tire if you are careful. The only reason this tire is #4 is tire width (and no treadwear warranty), it's pretty narrow at 8.2". Cost per mile of $0.04 for tires plus $0.16 for electricity. $200 per 1,000 miles operational cost. Wet stopping dist.  n/a feet; wet cornering n/a GForce. (Photo source: Goodyear.com)
View attachment 89493
Three options come with a 6570k warranty. Goodyear Wrangler doesn't.
A new Yokohama tire option on the horizon that is 3PMSF, 116H, lightweight (41#), and UTQG=660AA:
The Defender LTX M/S2 doesn't make the list since it's extremely narrow (<8"), it's also $100 more than the General Grabber HTS60. But it's a very highly rated tire so may be worth it for certain uses (snow/rain and light offroad).
The OEM 20" tire has an operational cost of almost $300 per 1,000 miles...
Discussions on 275/60 tire choices:
R1T 20" AT Replacement Tires?
My R1T's Most Miles Driven on 1 Tank of Battery = 366.5 miles
Time For Some New 20" Tires
20 Inch MICHELIN® X® LT A/S 2 (XL 275/60R20)
20" tire recommendations
Michelin Defender LTX Platinum
Weight rating RAM 2363 wheels?
What's the best wheel size for range and tire longevity?
Hello from Discount Tire!
20inch [AW09] Forged Wheels by Atomic Wheels
20" Michelin Defender LTX Platinum Tires review  For all of you thinking about a 20" tire! Your wait is over!
General disclaimer: Tire sizing and performance is convoluted and confusing, above info is simplified and generalized so the average person can see how range and efficiency change with different tire options. There are at least 510 other sizes that would likely work on the 20" OEM rims or an aftermarket option. This thread focuses only on size 275/60R20 so it's straightforward. If you are even remotely thinking of doing major offroading with your Rivian than most likely none of the above options will work for you. Ideally you'd have 23 sets of tires like a few folks here have, 1) Winter (if applicable), 2) Offroad (if applicable), and 3) Onroad set. For winter tires, best to be `34" diameter and not super wide. For offroad, best to be 3435" and around 10" wide, best tire onroad is 33" and between 89 inches wide (lightweight ~3545#s).
For any efficiency tests, it's important to note if Conserve is being used (best to test in AP). You might be tempted by someone reporting a 275/65R20 tire (60#) getting 2.2 MPK when reality is that AP MPK is going to be ~1.8...
END
View attachment 89490
https://www.autoblog.com/article/besttrucksuvtires/
Highlight: Four high efficiency 275/60R20 tires rise to the top getting ~2.5 MPK:
General Grabber HTS60, Pirelli AS+3, Goodyear Wrangler Territory HT, and Michelin Defender M/S2:
There's a lot of great info spread out across 510 threads here. This post is an effort to condense the info down into one location, links to contributing threads are below:
If you are looking for comparable info on OEM tires, see this thread:
High efficiency 20" wheels and ~34" tires options (R20  285/60  275/65  285/65  295/65)
Below is a list of 275/60R20 Tires that can be grouped into the high efficiency (>2 MPK) and ultra hiE (>2.3 MPK) clubs, organized by weight based on the correlation of low weight and high efficiency (I know, I know, rolling resistenceschmolling resistence...), also note there is a correlation to tread depth and weight:
The tires were also graded primarily based on weight/efficiency, A rating for tires with efficiency above 2.4 MPK. B rating for tires >2.3 MPK and less than 2.4. C rating for tires >2.2 MPK and less than 2.3. D rating for tires >2.1 MPK and less than 2.2. E and F ratings for the heavier tires 2.0 MPK and less...
Efficiency Grades (20")  MPK  Note 
A  >2.4  This is equal to or better than the 21" OEM option 
B  >2.3  Better than 20"/22" OEM options 
C  >2.2  Better than or equal to 20" OEM and equal to 22" OEM option 
The following equations describe the relationship between MPK (y, miles per kwh) and Tire Weight (x, pounds):
All Purpose Tire Efficiency = 3.35 MPK  (2.5% of Tire Weight) [Y=3.35X/40]
Conserve Tire Efficiency = 3.7 MPK  (2.5% of Tire Weight) [Y=3.7X/40]
Additional info related to MPK estimates:
Speed has a large impact on efficiency specially over 60 MPH, explained as follows:
2.6 MPK  [SPEED OVER 60]/20; [Y=2.6(x60)/20, where x is speed]
At 70 mph that's 2.1 MPK (2.60.5)
At 80 mph that's 1.6 MPK (2.61.0)
Temperature is another big factor for efficiency as the density of air changes significantly with different temps, a generalized equation describes the change as an increase of 0.1 MPK for every 7 degrees farenheit higher temp.
Elevation will impact efficiency as higher elevations have lower density air, so 2.0 MPK in Denver is equivalent to ~1.7 MPK at sea level.
Given all of these factors, someone in Denver on an 80F day driving 60 MPH in Conserve mode on 33" General Grabber HTS60s might be able to get 3.3 MPK whereas someone at sea level with a heavy AT tire (65#) driving in AP on a 40F day might only get 1.3 MPK. Not a big surprise that most peoples MPK fall somewhere in the middle near ~2.3 MPK due to all the different variables at play.
GRADE/ LOAD/PSI (max)  UTQG  Examples (275/60R20)  Width / Depth (inches)  #s/ $s  Actuals from 15minute Testing (60/65/70/75)  All Purpose (70 F @50 psi) mi/kwh (MPK)  Daily range in AP (8020%)**  100% eRange 
(A) XL/51  620 AB  ($) Gen. Grabber HTS60 (116T)  8.6 / 10/32  34/ $212  /2.2// (53 F, 48 psi 95% tread)  2.50  194 [344]  320358 
(A) SL/51  800 AA  ($) Pirelli AS+3 (115H)  8.3 / 11/32  38/ $273  tbd  2.40  186 [330]  307345 
(A) XL/50  680 AB  ($) Goodyear Wrangler Territory HT (116T)  8.2 / 11/32  39/ $245  tbd  2.38  184 [326]  304342 
(B) SL/51  580 AB  ($) Goodyear Wrangler Territory AT (115S)  9.0/ 12/32  40/ $239  tbd  2.35  182 [323]  301339 
(B) XL/50  820 BA  ($$) Defender LTX M/S2 (116H)  7.8 / 11/32  40/ $302  2.5/2.4/2.2/2.0 (Est.)  2.35  "  " 
( B) XL/50  660 AA  ($) GEOLANDAR CV 4S (116H) SNOW  8.1 / 13/32  41/ $280  tire not yet avail.  2.33  180 [320]  298336 
(B) SL/44  800 AB  ($$) Bridgestone Alenza AS Ultra (115H)  8.5 / 10/32  42 / $290  tbd  2.30  178 [316]  294333 
(B) SL/44  740 AA  ($) Cooper Discoverer SRX (115H) SNOW  8.9 / 11.5  42/ $212  tbd  2.30  "  " 
(B) SL/51  720 AA  ($) Nokian One HT (115H)  unk / 12.5  42/ $243  tbd  2.30  "  " 
(B) SL/51  640 AA  ($) Kumho Crugen HP71 (115H)  7.8 / 11/32  42/ $228  tbd  2.30  "  " 
(B) SL/44  600 AB  ($$) Toyo Open Country R/T Trail  9.0 / unk  43/ $345  tbd  2.25  174 [309]  288326 
(C) SL/51  660 AB  ($) Hankook Dynapro At2 Xtreme (115T)  8.8 / 12.5/32  44/ $258  tbd  2.25  "  " 
(C) SL/51  720 AA  ($) Conti. TerrainCntct H/T (115H)  8.9 / 12/32  44/ $259  tbd  2.25  "  " 
(C) SL/51  600 AB  ($) Yokohama Geolandar A/T G015 (115H) SNOW  8.3 / 12/32  45/ $261  tbd  2.23  172 [306]  284322 
(C) XL/50  500 AB  ($$) Nitto Ridge Grappler (116T)  8.9 / 13.5/32  45/ $313  tbd  2.23  "  " 
(C) XL/50  none  ($) Nitto Nomad Grappler (116H) SNOW  9.1 / 13.2/32  45/ $250  tbd  2.23  "  " 
(C) SL/51  680 AA  ($) Kumho Road Vent. AT52 (115T) SNOW  9.1 / 13.5/32  46/ $234  tbd  2.20  171 [303]  282320 
(D) SL/50  640 AB  ($$$) OEM Pirelli AT+ (116H) [275/65R20] SNOW  9.1 / 13/32  48/ $462  2.2/2.1/1.9/1.7 (55 F, 50 psi 80% tread)  2.15  167 [296]  275314 
(E) XL/50  640 AB  ($) Gen. Grabber A/TX (116T) SNOW  9.6 / 14/32  50/ $271  tbd  2.10  163 [289]  269307 
(E) LTD/65  none  ($$) Kumho Road Venture AT52 (119S)  8.8/ 16/32  52/ $350  tbd  2.05  160 [283]  263300 
(F) LTE/80  none  ($$$) Mich. Defend. Platinum (126S) [275/65R20]  8.9 / 14/32  60/ $424  tbd  1.85  143 [254]  237288 
(F) LTE/80  none  ($$) Gen. Grabber A/TX (126S) SNOW [275/65R20]  8.9 / 16/32  64/ $377  tbd  1.7  130 [232]  218269 
(F) LTE/80  none  ($$$) Mickey Thompson Baja Boss (126) [275/65R20]  9.7 / 18.5/32  64/ $422  (1.7/1.6/1.5/1.3)^^ test at elevation, adjusted for sea level  1.7 
**Plus 30 minute supercharge (+60kwh)
20" OEM QM efficiency (EPA): 289 mi / 2.1 mi/kwh
21" OEM QM efficiency (EPA): 321 mi / 2.4 mi/kwh
22" OEM QM efficiency (EPA): 303 mi / 2.2 mi/kwh
My top four choices come mainly from wanting a wider tire, they are in order:
1) General Grabber HTS60 [320 m. Range; 620 AB]  Best efficiency/range and 116 (but only 10/32 tread  ~20k miles expected). Also a A/T tire in XL and D size (65 psi) available. Cost per mile of $0.05 for tires plus $0.15 for electricity. $200 per 1,000 miles operational cost. Wet stopping dist.  140 feet; wet cornering 0.60 GForce. (Photo source: LL75; Rims (32#)  Atomic Wheels AW09  Gloss Black 20x8.5" +48 offset  $2,580.00 [~$2k w/ discount])
2) Pirelli AS+3 [307 m. Range; 800 AA]  Excellent efficiency and UTQG, width and 115 not so great, only 11/32 tread, also only 2025k miles expected. Cost per mile of $0.06 for tires plus $0.16 for electricity. $220 per 1,000 miles operational cost. Wet stopping dist.  132 feet; wet cornering 0.62 GForce. (Photo source: JJE; Rims  OEM 20")
3) Continental TerrainContact H/T [288 m. Range; 720 AA], special note for #3, it's also a high performance tire, rating much higher on wet performance and stopping distance....potentially 30k miles. If you're in a rainy area this is prob. the best choice. Cost per mile of $0.04 for tires plus $0.17 for electricity. $210 per 1,000 miles operational cost. Wet stopping dist.  109 feet; wet cornering 0.70 GForce. (Photo source: DoubleTake; Rims (33#)  EV Sportline Adventure Bronze  20x8.5" +48 offset  $1,995.95)
4) Goodyear Wrangler Territory HT [304 m. Range; 680 AB], only around 25k miles tire life expectancy. Some light off roading is possible with this tire if you are careful. The only reason this tire is #4 is tire width (and no treadwear warranty), it's pretty narrow at 8.2". Cost per mile of $0.04 for tires plus $0.16 for electricity. $200 per 1,000 miles operational cost. Wet stopping dist.  n/a feet; wet cornering n/a GForce. (Photo source: Goodyear.com)
View attachment 89493
Three options come with a 6570k warranty. Goodyear Wrangler doesn't.
A new Yokohama tire option on the horizon that is 3PMSF, 116H, lightweight (41#), and UTQG=660AA:
The Defender LTX M/S2 doesn't make the list since it's extremely narrow (<8"), it's also $100 more than the General Grabber HTS60. But it's a very highly rated tire so may be worth it for certain uses (snow/rain and light offroad).
The OEM 20" tire has an operational cost of almost $300 per 1,000 miles...
Discussions on 275/60 tire choices:
R1T 20" AT Replacement Tires?
My R1T's Most Miles Driven on 1 Tank of Battery = 366.5 miles
Time For Some New 20" Tires
20 Inch MICHELIN® X® LT A/S 2 (XL 275/60R20)
20" tire recommendations
Michelin Defender LTX Platinum
Weight rating RAM 2363 wheels?
What's the best wheel size for range and tire longevity?
Hello from Discount Tire!
20inch [AW09] Forged Wheels by Atomic Wheels
20" Michelin Defender LTX Platinum Tires review  For all of you thinking about a 20" tire! Your wait is over!
General disclaimer: Tire sizing and performance is convoluted and confusing, above info is simplified and generalized so the average person can see how range and efficiency change with different tire options. There are at least 510 other sizes that would likely work on the 20" OEM rims or an aftermarket option. This thread focuses only on size 275/60R20 so it's straightforward. If you are even remotely thinking of doing major offroading with your Rivian than most likely none of the above options will work for you. Ideally you'd have 23 sets of tires like a few folks here have, 1) Winter (if applicable), 2) Offroad (if applicable), and 3) Onroad set. For winter tires, best to be `34" diameter and not super wide. For offroad, best to be 3435" and around 10" wide, best tire onroad is 33" and between 89 inches wide (lightweight ~3545#s).
For any efficiency tests, it's important to note if Conserve is being used (best to test in AP). You might be tempted by someone reporting a 275/65R20 tire (60#) getting 2.2 MPK when reality is that AP MPK is going to be ~1.8...
END
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