Jeep Commander
XK, 2006–10

Factory gearing, tires, angles and brakes for the Commander, and what the usual upgrades do to it. Every number is from the maker's own figures unless the calculators say otherwise. A few figures here are still waiting on a factory document; the calculators mark them.

Use this truck in the calculators

109.5 in wheelbase · 34.1 in front · 44.9 in rear overhang

Stock tireP245/65R1729.5 in tall

Axle ratio3.55–3.73Factory, by trim

Crawl ratio34.7:1Best trim: 3.7 V6 Quadra-Trac II

Angles34.8 · 21.3 · 27.2°Approach, breakover, departure

Clearance8.6 inFactory figure

Highway mpg18EPA

Tire upgrades, worked out

3.7 V6 Quadra-Trac II, 3.55s, from P245/65R17

Tire	Height	Under the diffs	Speedo at 65	RPM at 65	Gears for daily	Open
265/70R17	31.6 in	+1.0 in	61 mph	2,037	3.73	Open →
285/70R17	32.7 in	+1.6 in	59 mph	1,968	3.73	Open →
33x10.50R17	33.0 in	+1.7 in	58 mph	1,951	3.73	Open →
33x12.50R17	33.0 in	+1.7 in	58 mph	1,951	3.73	Open →
255/80R17	33.1 in	+1.8 in	58 mph	1,947	3.73	Open →
285/75R17	33.8 in	+2.1 in	57 mph	1,903	3.73	Open →
315/70R17	34.4 in	+2.4 in	56 mph	1,873	3.73	Open →
35x11.50R17	35.0 in	+2.7 in	55 mph	1,839	3.73	Open →
35x12.50R17	35.0 in	+2.7 in	55 mph	1,839	3.73	Open →

Stock turns 2,179 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.

Trims

3 we have figures for

Trim	Tire	Transmission	Axle	Angles	Clearance	Open
3.7 V6 Quadra-Trac II	P245/65R17	W5A580 5-speed automatic	3.55	34.8 · 21.3 · 27.2	8.6 in	Use →
4.7 / 5.7 V8, 17-in	P245/65R17	545RFE 5-speed automatic	3.73	34.8 · 21.3 · 27.2	8.6 in	Use →
Limited / Overland 18-in (2007-10)	P245/60R18	545RFE 5-speed automatic	3.73	34.8 · 21.3 · 27.2	8.6 in	Use →

Size

Wheelbase: 109.5 in
Front overhang: 34.1 in
Rear overhang: 44.9 in
Height: 72 in
Body: SUV
Stock tires: P245/60R18, P245/65R17

Transmissions and low range

W5A580 5-speed automatic (3.7): 3.59 · 2.19 · 1.41 · 1 · 0.83
545RFE 5-speed automatic (4.7, 5.7): 3 · 1.67 · 1 · 0.75 · 0.67
Low range, nv245 quadra-trac ii: 2.72:1
Low range, nv245 quadra-drive ii: 2.72:1

Axles

Front: Chrysler 200 mm (7.9 in) IFS front; ELSD with Quadra-Drive II
Rear: Chrysler 8.25 (213 mm); ELSD with Quadra-Drive II
3.55 ratio: 3.7 V6 Quadra-Trac II
3.73 ratio: 4.7 / 5.7 V8, 17-in, Limited / Overland 18-in (2007-10)
Ratios made for it: 3.73

Brakes

Front rotor: 12.91 in, 328 mm
Front caliper piston: 48.0 mm
Rear rotor: 12.60 in, 320 mm
Rear: disc (solid, 320 x 14 mm)

Suspension

Front: short/long arm IFS, coil springs
Rear: 5-link (4 links plus track bar), coil springs
Rear layout: Factory 4-link

Fuel economy

EPA highway: 18 mpg
Rated years: 2006–2010, 4WD

Every calculator, set up for the Commander

Tire sizeBigger tires: speedo, clearance, angles and brakes.Compare tires RegearHighway RPM on every ratio and mpg.Pick your gears Crawl ratioHow slow it creeps, against other trucks.Work out crawl SpeedometerWhat it really reads on new tires.Fix your speedo LinksAnti-squat and what a lift does to it.Check your links Your rigBuild sheet and measured angles.Start a build sheet LeaderboardsWhere the Commander ranks against every stock truck.See where it ranks

Source: media.stellantisnorthamerica.com.

Use at your own risk. These calculators are here to help you plan and to inform your decisions, not to sign off on a build. Many numbers are estimates worked out from factory figures, and some factory figures are not yet confirmed. Check every number against your own truck, its manuals and a qualified shop before you buy parts, cut, weld, lift, regear or drive on it. Long Range Desert Tools is not liable for anything you do based on these calculators or their results. The full terms are in our policies.

Jeep CommanderXK, 2006–10