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Jeep Gear Ratio Chart for 33, 35 and 37-Inch Tires
Guide · Updated October 27, 2026
Bigger tires act like taller gears, so your Jeep feels slower and shifts more. This chart shows common gear choices owners use to get performance back.
Common gear choices
- 33s: stock gears are often fine; 4.10 if your factory gears are tall.
- 35s: about 4.56 to 4.88.
- 37s: about 4.88 to 5.13.
- 40s: 5.38 or deeper.
Heavier builds, towing and 4-door models often go one step deeper.
Why it matters
- Restores acceleration and highway passing power.
- Reduces transmission hunting and heat.
- Helps crawl control off-road.
Run your numbers
- Use the Tire & Gear Calculator to compare effective ratio and RPM.
- Read regear for bigger tires for the full explanation.
Check what fits
Browse all fit answers and the tire size chart.
Gear that helps
- Digital tire pressure gauge — check pressures cold, before you drive.
- Portable 12V air compressor — air back up after the trail or adjust at home.
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Disclaimer: General information for enthusiasts, not a substitute for your owner’s manual, a licensed mechanic or your tire shop. Confirm fitment for your exact Jeep before buying.
FAQ
What gears for 35s on a JL?
Many owners pick 4.56 or 4.88.
What gears for 37s?
Usually 4.88 or 5.13.
Do I need to regear for 33s?
Often not, unless your factory gears are tall.