200 degree
The trick to great ribs is to cook them very slowly with the BBQ sauce on them. You can do this in an oven, just set the temperature to 225° F (about 107° C). I occasionally use an electric smoker, which cooks at about 200 to 225 degrees Fahrenheit. I've also used this method on my gas grill and in my oven. Cook the ribs for 4½ to 5 hours. The time it takes you to cook the ribs may vary depending on the true temperature of your grill, oven, or smoker, the temperature of the ribs when you start, and other factors.  Follow. My pork ribs are taking a long time to reach an internal temperature of 165 degrees. I first boiled 2 lbs of ribs in water and seasoning for one hour. Then baked the ribs in a 325 degree oven for 1.5 hours. The internal temperature is only reading around 140 degrees. Place the ribs in the smoker and let it go. A good smoking temperature in the area of 200 degrees. You can go lower if you plan on doing a long smoke, but I don't recommend going higher. At this rate the ribs should be cooked through and tender after 4 hours. Go longer if you can. You will need a 200 degree temperature, smoke, and patience. I full rack of ribs can be smoked in about 4 hours but, if you have the time try and go the distance. The longer you smoke the more flavor it will produce. The first step in making pork ribs is to prepare the rack. Smoking Pork Spare Ribs: 1. Remove the ribs from the refrigerator about 45 minutes before cooking them so they are closer to room temperature. If you put a cold rack of ribs on the pit, it takes longer to cook them and you waste wood/charcoal. 2. 3. Shake the bottle and spray the ribs down every 45 minutes or so. 4. I smoke the beef ribs at a consistent temperature of 225 degrees F for about 1 hour per pound, but usually no more than 6 hours. As with all traditional Barbecue, pork ribs should be cooked low and slow with a good dose of smoke. This process will require a smoker of some kind, although you can do it with a kettle charcoal grill. You will need a 200 degree temperature, smoke, and patience. I full rack of ribs can be smoked in about 4 hours but, if you have the time try and go the distance. The longer you smoke the more flavor it will produce. The first step in making pork ribs is to prepare the rack. Ribs cooked on a barbecue smoker at a low temperature for several hours will be very tender. Ribs cooked on a grill, especially a gas grill, will not be as tender even cooked indirectly. To make your ribs tenderer you can precook by either boiling the ribs for about 30 minutes or by placing them in a slow cooker.  According to USDA, ribs are done when they are 145°F internal temp, but they may still be tough. If you take them up to 180°F, drop the oven temp to about 180°F and hold them at this temp for about 30 minutes, the collagens and fats melt some more at this temp and make the meat more tender and juicy. On most cookers, when the oven temp is 225°F at sea level, it takes about three to four hours to cook a slab of baby backs and about five to six hours to cook a slab of St. Louis cut ribs or spares. They are slightly undercooked at that stage. 1 Remove ribs from pot, and place them in a 9x13 inch baking dish. 2  Pour barbeque sauce over ribs. 3  Cover dish with aluminum foil, and bake in the preheated oven for 1 to 1 1/2 hours, or until internal temperature of pork has reached 160 degrees F (70 degrees C). 1 Pour barbeque sauce over ribs. 2  Cover dish with aluminum foil, and bake in the preheated oven for 1 to 1 1/2 hours, or until internal temperature of pork has reached 160 degrees F (70 degrees C). Begin basting ribs with sauce in the final 10 minutes of grill time (after about 1 1/2 hours). Any earlier and the sauce will simply dry out. Note: The USDA states that pork should be cooked to an internal temperature of 160 degrees F. 
http://www.mcraigweaver.com/recipes/ribs.stm http://www.chowhound.com/post/question-internal-temp-pork-ribs-safe-eat-708347 http://bbq.about.com/cs/ribs/a/aa092797.htm http://www.thesmokerking.com/page1b.html http://bbq.about.com/cs/ribs/a/aa092797.htm http://bbq.about.com/cs/ribs/a/aa071099a.htm http://amazingribs.com/tips_and_technique/are_they_ready.html http://allrecipes.com/recipe/16448/simple-bbq-ribs/ http://www.foodnetwork.com/recipes/barbeque-pork-spare-ribs-recipe.html
what temperature for pork ribs