How does NASCAR know when a tire is loose after a pit stop?
452338
A NASCAR official watches every pit stop in every race.  He watches to assure safety on the track.  If he notices that a tire changer didn't put all of the lug nuts on, NASCAR will call that driver back in to the pits to fix the problem.  Sometimes the tire changer will get all of the lug nuts on, but he doesn't tighten them all of the way.  In that case the driver will feel a "vibration".  That's when the car just doesn't feel right.  At that point the driver has to drive and diagnose the problem as a loose lug nut, tire loosing air pressure, or if it was a bad adjustment.  NASCAR doesn't know if a tire is loose, that's the drivers problem.  NASCAR only catches it when the tire changer doesn't get all of the lug nuts are on.
476705
A driver is said to be in the “lucky dog” postition during a NASCAR race when they are the first driver on the track one lap behind the leader. One might wonder: why would that person be called "lucky?" \n\nThey are considered “lucky” because when the next caution flag flies they will be allowed by NASCAR officials to go all the way around the track and be the last car on the lead lap. This means they get their lap back but only if they did not cause the caution. \n\nNASCAR decided last season that when a caution occurs the field will be “frozen.” During the caution, officials review their video from around the track and line the cars up for restart according to that film. This was done because of driver safety. There were some dangerous wrecks when one driver would slow down for a caution but someone behind him would speed up to gain a position or get a lap back. Giving the “lucky dog” pass is supposed to eliminate this. One must assume that everyone is paying attention when the caution comes out so they will slow down when everyone else does. \n\n“Racing back to the caution” was the norm for more than 40 years but all things NASCAR must change. \n\nThe drivers seem to like the “lucky dog” rule when it falls in their favor. Of course, fans like it when it falls in their driver’s favor. \n\nSometimes a driver is really, really lucky. For instance, Dale Earnhardt, Jr. was the “lucky dog” three times during the Bristol race on Saturday night. Eventhough, he went a lap down three times, the cautions fell at the right time so that he would get his lap back each time. He wound up finishing with a top ten and moved up one place in the Nextel cup points.
67480
your right about 'RR'.all those tyres are used by the team before the race and are slightly worn or beded in.on an oval NASCAR track,each tyre will wear differently so they are all marked as a set.FR=front right.FL=front left.RR=rear right.RL=rear left.hope this helps!!
456815
Take a Lincoln penney head down and stick it into the tread. If you can see the top of Lincolns head they need to be replaced. Or is they are cracking, or have bumps/knots on them they need to be replaced. My son had a blow out in his CRV because the on of his tires had slipped a belt (had a bump on it) and he didn't know it.
607386
to do the actual pit stop about 14.5 seconds..because you have all the drivers like gorden,kenseth,stewart and jr with 12 to 13 seconds everytime but then guys like petty, nemecheck, riggs have like 15 to 16 second stops..driving down pit road and then the pit stop would all depend on the track they are at.
300147
On a short track like Martinsville, wrecks are common.  The race today was not unusual.  Super-speedways (like Daytona) have far fewer accidents, but when they do wreck there, it is usually a big wreck.  They call it the "big one".
1045338
What it sounds like was that you didn't have enough air in the tube. When the pressure is too low, the tire & tube slide on the rim as you brake. The result is usually a cut in the valve stem or the valve stem can get completely cut away from the tube.  Rider weight does not affect the tube. If you're going to commute, go with a puncture or thorn resistant tube. It costs a little more, but is made from a heavier rubber and less prone to pinch flats & punctures. The "slime" filled tubes will usually stop small punctures but only make a mess when it comes to large punctures or cuts.
917487
a cop can pull you over for anything... they can say your left back tire looks like it has less air than the others... but to search it, they can only do if your kids gives them permission or they have a warrant
273505
That's going to be dependent upon the compound used for the tire (a tire made with a soft rubber designed for increased grip if going to lose more tread than a tire with a harder rubber designed to last a long period of time), the temperature of the tire (rubber gets softer as it heats up), the weight of the load placed on the tire, the friction between the tire and the road surface, and the type of road surface (a smooth road surface is going to be much easire than a rough road surface).\n\nThere's too many variables to really try to get to an answer.
89130
the try to skirt around the grey areas in the NASCAR rulebook to give their driver an advantage i.e. bigger fuel lines that will hold more so they will have that extra little bit of gas, having smaller drivers strap metal to their bodies so when they weigh the driver and car it meets the minium weight and then take it off for race day so there car is lighter and faster and the glass is to give them an aerodynamic advantage for the draft and better sticking ability or downforce for turns.
633123
This is a hypothetical guess based on what happens at most major races.\n\nPits are assigned based on qualifying number. Fastest car gets the first pick of which pit they want, the last car the last.
295176
Well take that skinny tire and put the normal tire pressure on it and see what happons. It will come off the rim.\nThe best way to explain this is look at the so called donut spair tire that you find on your car. It has 60psi in in and you put all that waight of the car on it.\nSame thing with the bike tire. It has a lot of waight on it for such a small tire, thus the hight psi.
570785
try here it'll tell ya every thing you need\n\nhttp://www.nascar.com/news/headlines/official/points.explained/
210508
Basically you lighten the load on the spring on that side. In theory that should help the handling of the car. \n\nBuddy Baker explained the difference between "LOOSE" and "TIGHT" in simple terms. He said when the car is TIGHT you see the accident (head on into the wall) and when the car is LOOSE you don't see the accident. (You back into the wall)\n\nDennis
1177813
no they don't. check this...\nTreadless Design\nNASCAR tires look completely bald, but that's not because they are worn out. It is by design. On a dry track, tires can generate more traction if more of their sticky rubber is in contact with the ground. Putting a tread pattern on the tire helps in wet weather, but in dry weather it is better to have the whole tire touching the ground. That's why NASCAR races stop whenever the track is wet.
325484
I agree with the last answer. You have a bad tire. Balancing a tire will not identify an out-of-round tire necessarily. You probably have a ply or belt separation in one of your tires. It's visible by a bobbing rather than smooth rotation when it's on the balancing machine. The problem is that balancing machines have a safety cover to keep the technician from observing the perimeter of the tire as it rotates on the machine.
537270
At a guess, it could just be the way the cars have been set up by the teams operating them - e.g. too much fuel, tyre pressures, suspension geometry, way the cars are being driven perhaps wearing the tyres out faster while the other teams drivers are preserving them better.