How Long to Smoke Prime rib
An 8 lb prime rib takes 4 h to 4 h 40 m at 250°F. Plan for 4 h 25 m, then rest it 20 minutes or more.
4 h – 4 h 40 m
Plan for 4 h 25 m at 250°F · 8 lb prime rib (bone-in rib roast)
| Light the cooker | 6 h 30 m before serving |
| Pull at | about 130°F and probe-tender |
| Rest | 20–30 min |
| Cooked meat you get | 5 – 5 lb |
Prime rib smoke times by weight
| Weight | 225°F | 250°F | 275°F |
|---|---|---|---|
| 4 lb | 2 h 20 m – 2 h 40 m | 2 h – 2 h 20 m | 1 h 20 m – 1 h 40 m |
| 6 lb | 3 h 30 m – 4 h | 3 h – 3 h 30 m | 2 h – 2 h 30 m |
| 8 lb | 4 h 40 m – 5 h 20 m | 4 h – 4 h 40 m | 2 h 40 m – 3 h 20 m |
| 10 lb | 5 h 50 m – 6 h 40 m | 5 h – 5 h 50 m | 3 h 20 m – 4 h 10 m |
| 12 lb | 6 h 55 m – 8 h 05 m | 6 h – 6 h 55 m | 3 h 55 m – 5 h 05 m |
How we calculate
- Time range = weight × hours per pound from the sources below (ribs, chicken, tri-tip and belly are timed per piece).
- The plan sits 60% of the way from the short end to the long end. Finishing early is easy to fix with a longer rest; finishing late is not.
- Several pieces: time follows the biggest one, plus 10% when the smoker holds 3 or more.
- Wrapping: where a source gives wrapped times we use them; otherwise we take about 10% off for butcher paper and 20% for foil (our estimate).
- Light the smoker at: plan + rest + a 1-hour buffer + 45 minutes to light and settle it. Cooked yield is from the USDA Food Buying Guide.
- Spare ribs: our source gives one 5–6 hour estimate for pork ribs; we use it at both 225 and 250°F.
Sources disagree by an hour or more on big cuts; that spread is why we show a range. Always finish by internal temperature. Data as of Oct 2026. Full list of sources: How we calculate.
| Cut | Pit | Range | Source |
|---|---|---|---|
| Prime rib (bone-in rib roast) | 225°F | 0.58–0.67 h per lb | traeger.com |
| Prime rib (bone-in rib roast) | 250°F | 0.5–0.58 h per lb | traeger.com |
| Prime rib (bone-in rib roast) | 275°F | 0.33–0.42 h per lb | traeger.com |
Related
FAQ
How long to smoke prime rib?
An 8 lb prime rib takes 4 h to 4 h 40 m at 250°F. Plan for 4 h 25 m, then rest it 20 minutes or more.
What temperature should prime rib reach?
Pull it at about 130°F. USDA safe minimums: 145°F for whole cuts of beef and pork with a 3-minute rest, 165°F for poultry.
Should I wrap prime rib?
Wrapping in butcher paper keeps most of the bark and shortens the cook; foil is faster still but softens the bark.
Is it better to smoke prime rib at 225 or 250?
At 250°F you save time with little change in texture. 225°F: plan 5 h 05 m, 250°F: plan 4 h 25 m, 275°F: plan 3 h 05 m.