2026 model year · First generation

INEOS Grenadier tire size

Largest standard tire, 2026265/70R17

Maker31.6 in tall, nominal

The 2026 INEOS Grenadier comes on 265/70R17 tires as standard, per INEOS’s Grenadier MY26 Owner's Handbook, Australia.

Grenadier MY26 Owner's Handbook, Australia (EI-0000034927_MY26_AUS)

Standard sizes: 1
Wheels: 17 in

2024 INEOS Grenadier Station Wagon Trialmaster Edition, front three-quarter view — Photo: Mr.choppers, CC BY-SA 3.0, via Wikimedia Commons, resized.

01 / Stock

Tires and wheels on every 2026 Grenadier

The size each configuration leaves the factory on, and the one an option package swaps in. These are INEOS’s Australian-market specifications.

2026 INEOS Grenadier

MakerEstimate ±

Stock tire and wheel sizes of the 2026 INEOS Grenadier by configuration
Configuration	Tire	Tall in, nominal	Wheel	Type
Trialmaster Station Wagon (5-seat)/Quartermaster (5-seat pick-up)	LT265/70R17^{source 1}	31.6	17" steel wheels^{source 2}	BFGoodrich All-Terrain^{source 2}
Fieldmaster Station Wagon (5-seat)/Quartermaster (5-seat pick-up)	LT265/70R17^{source 1}	31.6	17" alloy wheels^{source 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 Grenadier depends on lift, wheel offset and trim; these figures don’t say.

From 265/70R17Stock on the Trialmaster Station Wagon (5-seat)/Quartermaster (5-seat pick-up); Fieldmaster Station Wagon (5-seat)/Quartermaster (5-seat pick-up) · 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	Compare
265/70R17stock	31.6	0.0	60.0	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	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	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	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	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

Grenadier stock tires by model year

Stock tire sizes of the INEOS Grenadier by model year
Year	Stock sizes
2026	265/70R17 Trialmaster Station Wagon (5-seat)/Quartermaster (5-seat pick-up); Fieldmaster Station Wagon (5-seat)/Quartermaster (5-seat pick-up)
2025	265/70R17 Grenadier; Trialmaster; Fieldmaster; Grenadier with the Rough Pack; Fieldmaster with the Rough Pack 255/70R18 Grenadier with the 18-inch wheels; Grenadier with the Rough Pack + 18-inch wheels; Trialmaster with the 18-inch wheels; Fieldmaster with the 18-inch wheels; Fieldmaster with the Rough Pack + 18-inch wheels
2024	265/70R17 Trialmaster 255/70R18 Fieldmaster
2023	265/70R17 Trialmaster; Fieldmaster

The 2026 Grenadier belongs to the generation below; their pages have each configuration’s clearance, angles and weights.

INEOS Grenadier 1st gen (2022–present): 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 Grenadier’s gearing.Compare sizes Grenadier specsClearance, angles and weights, and the rig builder to see a lift and bigger tires on it.Open the spec plate Grenadier 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 2026 Grenadier’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 2026 Grenadier have?

17" steel wheels: Trialmaster Station Wagon (5-seat)/Quartermaster (5-seat pick-up). 17" alloy wheels: Fieldmaster Station Wagon (5-seat)/Quartermaster (5-seat pick-up).

Did the INEOS Grenadier’s tire sizes change by year?

2026: 265/70R17. 2025: 265/70R17, 255/70R18 with a package. 2024: 265/70R17, 255/70R18. 2023: 265/70R17.