Chevrolet Tahoe
2021+ incl. Z71
Factory gearing, tires, angles and brakes for the Tahoe, 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.
Tire upgrades, worked out
Z71 coil springs, 3.23s, from 275/60R20| Tire | Height | Under the diffs | Speedo at 65 | RPM at 65 | Gears for daily | Open |
|---|---|---|---|---|---|---|
| 275/65R20 | 34.1 in | +0.5 in | 63 mph | 1,305 | Keep 3.23s | Open → |
| 35x11.50R20 | 35.0 in | +1.0 in | 61 mph | 1,270 | 3.42 | Open → |
| 35x12.50R20 | 35.0 in | +1.0 in | 61 mph | 1,270 | 3.42 | Open → |
| 37x13.50R20 | 37.0 in | +2.0 in | 58 mph | 1,202 | 3.55 | Open → |
Stock turns 1,348 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.
Trims
4 we have figures for| Trim | Tire | Transmission | Axle | Angles | Clearance | Open |
|---|---|---|---|---|---|---|
| Z71 coil springs | 275/60R20 | 10-speed automatic | 3.23 | 31.5 · 18.5 · 20.5 | 8.0 in | Use → |
| Z71 Air Ride, max ride height | 275/60R20 | 10-speed automatic | 3.23 | 34.5 · 22 · 22.5 | 10.0 in | Use → |
| Premier 4WD (20-inch) | P275/55R20 | 10-speed automatic | 3.23 | 24.5 · 18.5 · 20.5 | 8.0 in | Use → |
| High Country 4WD (22-inch) | P285/45R22 | 10-speed automatic | 3.23 | 24.5 · 18.5 · 20.5 | 8.0 in | Use → |
Size
- Wheelbase
- 120.9 in
- Front overhang
- 37.5 in
- Rear overhang
- 52.2 in
- Height
- 76 in
- Body
- SUV
- Stock tires
- 275/60R20, P275/55R20, P285/45R22
Transmissions and low range
- 10-speed automatic (10L80)
- 4.69 · 2.98 · 2.14 · 1.77 · 1.52 · 1.27 · 1 · 0.85 · 0.69 · 0.63
- Low range, 3025
- 2.72:1
Axles
- Front
- GM IFS front drive unit
- Rear
- GM independent rear drive unit (eLSD on Z71)
- 3.23 ratio
- All trims
Brakes
- Front rotor
- 13.50 in, 343 mm
- Front caliper piston
- 51.0 mm
- Rear rotor
- 13.58 in, 345 mm
- Rear
- disc (vented, 345 x 20 mm)
Suspension
- Front
- double wishbone IFS, coil or air
- Rear
- independent multi-link, coil springs; air springs on upper trims
- Rear layout
- Independent
Fuel economy
- EPA highway
- 19 mpg
- Rated years
- 2021–2026, 4WD
Brake upgrades
What bigger tires need →- Brembo 6-piston front brake kit (accessory, 410 mm rotors)+23% brake torque13.5 → 16.1 in rotor · 6-pistonNot checked.
- Baer 6T front brake kit 4301682B-2 (GM 1500 trucks 1999-on, SUVs 2000-on)13.5 → 13.5 in rotor · 6-piston · 17 in wheels or bigger · $1,900Baer list price (black calipers).
Aftermarket bumpers
4 listedMakers almost never publish angles, bottom heights or how far a bumper tucks, so these fill in as owners measure them. Measured yours? Add it on the rig page and every owner of this Tahoe sees how it does on their tires and lift.
Front 3
Rear 1
- Iron Bull Bumpers 2021-2024 Chevrolet Tahoe Rear Bumper$2,150 · winch ready
Every calculator, set up for the Tahoe
Source: cwr.services. Independent rear drive unit; no common aftermarket ring and pinion sets, so regearing is not a practical option.
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.