Time by pit temp
| Pit temp | Time (per St. Louis rack) |
|---|---|
| 225°F | 5½–6½ hr |
| 250°F | 5–6 hr |
| 275°F | 4–5 hr |
Doneness: 195–203°F
Temping between bones is fiddly; trust the bend test — pick the rack up with tongs at one end, and it should bow deeply and start to crack the surface.
Wrapping
The classic 3-2-1 rhythm at 225°F — 3 hours naked, 2 wrapped in foil, 1 back out to set — makes near-fall-off-the-bone ribs. For more chew, shorten the wrap or skip it.
Rest & hold
Rest at least 10–15 minutes. Ribs need only a short rest. Cut with the bones facing up so you can see your knife lines. For food safety, hold hot meat above 140°F — a wrapped rest in a dry cooler does exactly that.
How much to buy
Quantities are the other half of the plan: portions, yield, and a group-size chart live on how much spare ribs per person.
Frequently asked questions
How long do spare ribs take to smoke at 225°F?
Roughly 5½–6½ hr at 225°F, per St. Louis rack. That's a planning range, not a promise — thickness and the cooker's mood move the finish.
What temperature are spare ribs done?
Temping between bones is fiddly; trust the bend test — pick the rack up with tongs at one end, and it should bow deeply and start to crack the surface. Pork is safe at 145°F, but ribs eat tough there — tenderness arrives much later.
Should I wrap spare ribs?
The classic 3-2-1 rhythm at 225°F — 3 hours naked, 2 wrapped in foil, 1 back out to set — makes near-fall-off-the-bone ribs. For more chew, shorten the wrap or skip it.
How long should spare ribs rest?
At least 10–15 minutes. Ribs need only a short rest. Cut with the bones facing up so you can see your knife lines.