4WD.ai4x4 · off-road · overlanding

2027 model year · Fifth generation (DT)

Ram 1500 tire size

Largest standard tire, 2027325/65R18

Maker34.6 in tall, nominal

The 2027 Ram 1500 comes on 325/65R18, 275/55R20 or 285/45R22 tires as standard, by trim, per the 2027 Ram 1500 Specifications. 275/65R18 comes with the Tire option 275/65R18; 305/50R20 comes with the Tire option 305/50R20 (late availability); 325/40R22 comes with the Air suspension.

2027 Ram 1500 Specifications (spec sheet)

Standard sizes: 3
With a package: 3 sizes
Wheels: 18–22 in

2019 Ram 1500 Rebel 4x4, front three-quarter view — Photo: Kevauto, CC BY-SA 4.0, via Wikimedia Commons, resized.

01 / Stock

Tires and wheels on every 2027 Ram 1500

The size each configuration leaves the factory on, and the one an option package swaps in.

2027 Ram 1500

MakerEstimate ±

Stock tire and wheel sizes of the 2027 Ram 1500 by configuration
Configuration	Tire	Tall in, nominal	Wheel
Standard
Tradesman, Limited	275/55R20^{source 1}	31.9	not in our data
RHO, TRX SRT	325/65R18^{source 1}	34.6	not in our data
Trim not specified	285/45R22^{source 1}	32.1	not in our data
With a factory package
Tradesman, Big Horn / Lone Starwith Tire option 275/65R18	275/65R18^{source 2}	32.1	not in our data
Big Horn / Lone Star, Laramiewith Tire option 275/55R20	275/55R20^{source 2}	31.9	not in our data
Trim not specifiedwith Tire option 305/50R20 (late availability)	305/50R20^{source 1}	32.0	not in our data
Trim not specifiedwith Air suspension	325/40R22^{source 1}	32.2	not in our data

Tire, wheel and fitment figures are the maker’s. “Tall” is worked out from the size code (dashed); a real tire measures a little differently. —: not in the documents we hold yet.

SourcesMakerThe small number by a figure says which document it is from.

Documents last checked Oct 6, 2026. How we read them and what the marks mean: how we source the numbers. A figure doesn’t match its document? Report a wrong number.

02 / Bigger tires

What the next sizes up change

From each stock size, the common larger sizes on the same wheel: how much taller, how far the axles rise, what the speedometer shows and how the axle ratio behaves. Whether one fits your Ram 1500 depends on lift, wheel offset and trim; these figures don’t say.

From 325/65R18Stock on the RHO, TRX SRT · 34.6 in tall

What larger tires change compared with the stock 325/65R18
Size	Tall in	Axles rise in	At an indicated 60 true mph	Axle ratio acts like	Compare
325/65R18stock	34.6	0.0	60.0	3.55 3.92	Baseline
37x12.50R18+2.4 in taller	37.036.4 to 37.6	+1.2+0.9 to +1.5	64.163.1 to 65.1	3.323.27 to 3.37 3.673.62 to 3.73	Compare →

Estimate ±Worked out from the nominal sizes; the small line is the range for real tires within 1.5% of nominal.

From 275/55R20Stock on the Tradesman, Limited; Big Horn / Lone Star, Laramie with the Tire option 275/55R20 · 31.9 in tall

What larger tires change compared with the stock 275/55R20
Size	Tall in	Axles rise in	At an indicated 60 true mph	Axle ratio acts like	Compare
275/55R20stock	31.9	0.0	60.0	3.21 3.55	Baseline
275/60R20+1.1 in taller	33.032.5 to 33.5	+0.5+0.3 to +0.8	62.061.1 to 63.0	3.103.06 to 3.15 3.433.38 to 3.49	Compare →
275/65R20+2.2 in taller	34.133.6 to 34.6	+1.1+0.8 to +1.3	64.163.1 to 65.0	3.012.96 to 3.05 3.323.28 to 3.38	Compare →
35x12.50R20+3.1 in taller	35.034.5 to 35.5	+1.5+1.3 to +1.8	65.864.8 to 66.8	2.932.88 to 2.97 3.243.19 to 3.29	Compare →

Estimate ±Worked out from the nominal sizes; the small line is the range for real tires within 1.5% of nominal.

From 285/45R22Stock on the Trim not specified · 32.1 in tall

What larger tires change compared with the stock 285/45R22
Size	Tall in	Axles rise in	At an indicated 60 true mph	Compare
285/45R22stock	32.1	0.0	60.0	Baseline
305/45R22+0.7 in taller	32.832.3 to 33.3	+0.4+0.1 to +0.6	61.360.4 to 62.2	Compare →
33x12.50R22+0.9 in taller	33.032.5 to 33.5	+0.5+0.2 to +0.7	61.760.8 to 62.6	Compare →
35x12.50R22+2.9 in taller	35.034.5 to 35.5	+1.5+1.2 to +1.7	65.464.4 to 66.4	Compare →

Estimate ±Worked out from the nominal sizes; the small line is the range for real tires within 1.5% of nominal.

From 275/65R18Stock on the Tradesman, Big Horn / Lone Star with the Tire option 275/65R18 · 32.1 in tall

What larger tires change compared with the stock 275/65R18
Size	Tall in	Axles rise in	At an indicated 60 true mph	Axle ratio acts like	Compare
275/65R18stock	32.1	0.0	60.0	3.21 3.55	Baseline
265/70R18+0.5 in taller	32.632.1 to 33.1	+0.3±0.0 to +0.5	61.060.1 to 61.9	3.163.11 to 3.21 3.493.44 to 3.55	Compare →
275/70R18+1.1 in taller	33.232.7 to 33.7	+0.5+0.3 to +0.8	62.061.1 to 63.0	3.113.06 to 3.15 3.433.38 to 3.49	Compare →
295/70R18+2.2 in taller	34.333.7 to 34.8	+1.1+0.8 to +1.3	64.163.1 to 65.0	3.012.96 to 3.05 3.323.27 to 3.37	Compare →
285/75R18+2.8 in taller	34.834.3 to 35.4	+1.4+1.1 to +1.6	65.264.2 to 66.1	2.962.91 to 3.00 3.273.22 to 3.32	Compare →
35x12.50R18+2.9 in taller	35.034.5 to 35.5	+1.5+1.2 to +1.7	65.564.5 to 66.5	2.942.90 to 2.99 3.253.21 to 3.30	Compare →

Estimate ±Worked out from the nominal sizes; the small line is the range for real tires within 1.5% of nominal.

From 305/50R20Stock on the Trim not specified with the Tire option 305/50R20 (late availability) · 32.0 in tall

What larger tires change compared with the stock 305/50R20
Size	Tall in	Axles rise in	At an indicated 60 true mph	Compare
305/50R20stock	32.0	0.0	60.0	Baseline
275/60R20+1.0 in taller	33.032.5 to 33.5	+0.5+0.2 to +0.7	61.860.9 to 62.8	Compare →
275/65R20+2.1 in taller	34.133.6 to 34.6	+1.0+0.8 to +1.3	63.962.9 to 64.8	Compare →
35x12.50R20+3.0 in taller	35.034.5 to 35.5	+1.5+1.2 to +1.8	65.664.6 to 66.6	Compare →

Estimate ±Worked out from the nominal sizes; the small line is the range for real tires within 1.5% of nominal.

From 325/40R22Stock on the Trim not specified with the Air suspension · 32.2 in tall

What larger tires change compared with the stock 325/40R22
Size	Tall in	Axles rise in	At an indicated 60 true mph	Compare
325/40R22stock	32.2	0.0	60.0	Baseline
305/45R22+0.6 in taller	32.832.3 to 33.3	+0.3±0.0 to +0.5	61.160.1 to 62.0	Compare →
33x12.50R22+0.8 in taller	33.032.5 to 33.5	+0.4+0.1 to +0.6	61.460.5 to 62.3	Compare →
35x12.50R22+2.8 in taller	35.034.5 to 35.5	+1.4+1.1 to +1.6	65.164.2 to 66.1	Compare →

Estimate ±Worked out from the nominal sizes; the small line is the range for real tires within 1.5% of nominal.

Assumption, not data

Heights come from the size code. A real tire of a size measures within about 1.5% of it, depending on brand, tread, wheel width and pressure, so each figure carries that range. The axles rise by half the change in height; the body only rises with a lift.

03 / By year

Ram 1500 stock tires by model year

Stock tire sizes of the Ram 1500 by model year
Year	Stock sizes
2027	325/65R18 RHO, TRX SRT 275/55R20 Tradesman, Limited; Big Horn / Lone Star, Laramie with the Tire option 275/55R20 285/45R22 Trim not specified 275/65R18 Tradesman, Big Horn / Lone Star with the Tire option 275/65R18 305/50R20 Trim not specified with the Tire option 305/50R20 (late availability) 325/40R22 Trim not specified with the Air suspension
2025	275/65R18 Tradesman with the Tire option 275/65R18 275/55R20 Tradesman, Limited with the Tire option 275/55R20
2020	275/65R18 Tradesman with the Tire option 275/65R18 275/55R20 Tradesman with the Tire option 275/55R20
2019	275/65R18 Tradesman with the Tire option 275/65R18 275/55R20 Tradesman with the Tire option 275/55R20
2011	265/70R17 ST 3.7L V6/5.7L HEMI V8 without eTorque; Big Horn / Lone Star, Laramie, ST 4.7L V8/5.7L HEMI V8 without eTorque, SLT, Outdoorsman, Lone Star with the P265/70R17 tires (2011 chart row) 275/60R20 Sport, Premium; Big Horn / Lone Star, Laramie, SLT, Outdoorsman, Lone Star with the P275/60R20 tires (2011 chart row) 285/40R22 R/T 275/70R17 Big Horn / Lone Star, Laramie, ST 4.7L V8/5.7L HEMI V8 without eTorque, SLT, Outdoorsman, Lone Star with the LT275/70R17C tires (2011 chart row)

The 2027 Ram 1500 belongs to the generation below; their pages have each configuration’s clearance, angles and weights.

Ram 1500 DT (2019–present): full specs

04 / Next

Try a size on your rig

Tire size calculatorPut 325/65R18 next to 37x12.50R18 or any size you’re eyeing, with this Ram 1500’s gearing.Compare sizes Ram 1500 specsClearance, angles and weights, and the rig builder to see a lift and bigger tires on it.Open the spec plate Ram 1500 towingTowing, payload, GCWR and tongue weight for every configuration.See towing Tire sizes by vehicleEvery stock size on the trucks and SUVs we cover, by wheel diameter.Browse sizes

05 / FAQ

Questions people ask

Which 2027 Ram 1500 tires are standard, and which come with a package?

Standard: 325/65R18 (RHO, TRX SRT); 275/55R20 (Tradesman, Limited); 285/45R22 (Trim not specified). The Tradesman, Big Horn / Lone Star gets 275/65R18 with the Tire option 275/65R18; the Big Horn / Lone Star, Laramie gets 275/55R20 with the Tire option 275/55R20; the Trim not specified gets 305/50R20 with the Tire option 305/50R20 (late availability); the table lists 1 more option.

How far off is the 2027 Ram 1500’s speedometer with bigger tires?

Set for the stock 275/55R20, with 275/60R20s it reads about 3.3% low: 62.0 mph at an indicated 60 (61.1 to 63.0, by brand) and with 35x12.50R20s it reads about 8.8% low: 65.8 mph at an indicated 60 (64.8 to 66.8, by brand). Worked out from the nominal sizes.

What is the biggest tire the 2027 Ram 1500 comes on?

As built, the 325/65R18, about 34.6 in tall (nominal), on the RHO, TRX SRT.

Did the Ram 1500’s tire sizes change by year?

2027: 325/65R18, 275/55R20, 285/45R22, 275/65R18 with a package, 305/50R20 with a package, 325/40R22 with a package. 2025: 275/65R18 with a package, 275/55R20 with a package. 2020: 275/65R18 with a package, 275/55R20 with a package. 2019: 275/65R18 with a package, 275/55R20 with a package. 2011: 265/70R17, 275/60R20, 285/40R22, 275/70R17 with a package.