2020 model year · Fourth generation (K2XX)

Chevrolet Suburban tire size

Largest standard tire, 2020265/70R17

Maker31.6 in tall, nominal

The 2020 Chevrolet Suburban comes on 265/70R17 tires as standard, per Chevrolet’s 2020 Suburban 1FL specification guide.

2020 Suburban 1FL specification guide

Standard sizes: 1
Wheels: 17 in

01 / Stock

Tires and wheels on every 2020 Suburban

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

2020 Chevrolet Suburban

MakerEstimate ±

Stock tire and wheel sizes of the 2020 Chevrolet Suburban by configuration
Configuration	Tire	Tall in, nominal	Wheel	Type
Suburban 1FL	P265/70R17	31.6	17x8	All-terrain, blackwall

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.

SourceMakerEvery figure above is Chevrolet’s, from this document.

2020 Suburban 1FL specification guide · General Motors (GM Upfitter / GM Fleet)

Documents last checked Oct 12, 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 Suburban depends on lift, wheel offset and trim; these figures don’t say.

From 265/70R17Stock on the Suburban 1FL · 31.6 in tall

What larger tires change compared with the stock 265/70R17
Size	Tall in	Axles rise in	At an indicated 60 true mph	Axle ratio acts like	Compare
265/70R17stock	31.6	0.0	60.0	3.08	Baseline
285/70R17+1.1 in taller	32.732.2 to 33.2	+0.6+0.3 to +0.8	62.161.2 to 63.0	2.982.93 to 3.02	Compare →
285/75R17+2.2 in taller	33.833.3 to 34.3	+1.1+0.9 to +1.4	64.263.3 to 65.2	2.882.83 to 2.92	Compare →
315/70R17+2.8 in taller	34.433.8 to 34.9	+1.4+1.1 to +1.6	65.264.3 to 66.2	2.832.79 to 2.88	Compare →
35x12.50R17+3.4 in taller	35.034.5 to 35.5	+1.7+1.4 to +2.0	66.465.4 to 67.4	2.782.74 to 2.82	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

Suburban stock tires by model year

Stock tire sizes of the Chevrolet Suburban by model year
Year	Stock sizes
2020	265/70R17 Suburban 1FL
2019	265/70R17 Suburban 1FL

The 2020 Suburban belongs to the generation below; their pages have each configuration’s clearance, angles and weights.

Chevrolet Suburban K2XX (2015–2020): full specs

04 / Next

Try a size on your rig

Tire size calculatorPut 265/70R17 next to 285/70R17 or any size you’re eyeing, with this Suburban’s gearing.Compare sizes Suburban specsClearance, angles and weights, and the rig builder to see a lift and bigger tires on it.Open the spec plate Suburban 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

How far off is the 2020 Suburban’s speedometer with bigger tires?

Set for the stock 265/70R17, with 285/70R17s it reads about 3.4% low: 62.1 mph at an indicated 60 (61.2 to 63.0, by brand) and with 35x12.50R17s it reads about 9.7% low: 66.4 mph at an indicated 60 (65.4 to 67.4, by brand). Worked out from the nominal sizes.

What size wheels does the 2020 Suburban have?

17x8 on every configuration we list, per Chevrolet’s documents.

Did the Chevrolet Suburban’s tire sizes change by year?

Not in the years we have: 2019 to 2020 all list 265/70R17.