Q:As to prevent flat tires, or is there a better product out there?

This is a good sealer, but it (and ALL tire sealers) makes such a nasty mess inside there that SOME tire dealers will charge extra when you buy new tires. They don't like removing all that crapolla from the rims and their equipment.

Q:I‘m looking for used snow tires. I have a Chevy cavalier tire size is 195/70/14 but when I search for snow tires in that size I‘m not finding any matches (which could simply be because there aren‘t any) but what I am finding is 170/75/14. Would those work or no?

thats because you have a popular tire size and the good ones disappear fast so you have to either spend far too much time looking for what is likely to be a poor used tire or spend a few bucks and buy a new tire that has what you want and is safe. Also your chances of getting 4 used snow tires is almost zero. 2 here , two there maybe, but not 4. go with the size recommended by the factory it will work the best. not some skinny scrwany tire.

Q:What circumstances need to change car tires

There are three cases where you can change the tires: 1, tread loss close to the wear mark. Any brand of tires will be set in the tread groove at the bottom of a wear mark. General car tires wear a mark of height of 1.6 mm (this height is also the minimum tire trench depth), the load on the tire wear mark height of 2.4 mm. 2, the tire cracks or drums and other damage in the process of daily cars, tires or foreign body will be tied to, or accidentally hit the road teeth, which will lead to damage to the tire. Tire damage situation, including tread cracks, tread drums, tread rubber missing, serious sidewall wear, tires repeatedly been foreign body and so on. Especially drums, tires at any time there will be the risk of bursting. As long as the tire appears to be damaged, the owner as soon as possible to the professional tire shop to check the car's tires, timely replacement. 3, the tire life expires. Even if the owner of the usual driving how the gentle, how good the road, how to maintain the tire in place, the tire is used for a long time, it will gradually aging. Tire life is usually about 5 years, more than this period, the tire will begin to aging. Tire aging is the main performance of the surface hardening, followed by turtle cracks. Aging tires will lose their elasticity, continue to use, then will lead to tread deformation, there is the risk of puncture.

Q:Why do cars make tires with rubber?

Rubber is divided into two kinds of natural rubber and synthetic rubber, these two rubber are used in different locations of the tire, tire performance requirements of different locations are too different, in general, is the comprehensive chemical properties of rubber and curing technology applications;

Q:Are continental tires any good? They sell them at wal-Mart.for my truck they have goodyear and continental.

If you plan to use the tires in anything resembling snow or winter conditions the Goodyear Eagle GT is truly awful - one of the worst UHP all-season tires I have ever tried - while the DWS is in a class of its own under such circumstances. The Continental is IMHO the only UHP All-Season tire that can actually be called an all-season tire with a straight face. If you live someplace that does not have winter type driving conditions, why look at all-season tires at all? An all-season tire is just a bad compromise that gives up a lot of dry and wet weather performance for some ability to drive in the winter.

Q:I recently bought a Kinetic Kurt trainer- I wanted to buy a training tire so it would be quieter and not wear out my good rear tire. The guy at REI told me I might as well go with a regular tire, use my normal tube and just buy a cheepo tire. Is he right? Is there a reason why I might want a trainer specific tire?

Interesting question but I believe that if you consider the physics of a trainer you'll find that there will be little wear on the tire when you're using the trainer. What causes wear on a tire is the rubbing together of the road surface and the tire as it rolls, leans in turns and reduces your speed when braking. Remember that the only points of contact between your bike and the road surface are the tires. Of course, the rougher the surface of the road the more wear will occur. When you're on a trainer the tire is in constant contact with the generally smooth surface of the trainer and there's minimal friction between the two round objects turning at the same speed so tire wear is minimal. In a trainer there's no leaning in the turns, no braking, and no rubbing between a rolling tire and a static road surface. The biggest single reason for using a different tire would be the noise issue. The more aggressive the tread design the more noise it'll make on the trainer or on the road. I think that for the most part, if your good tire were a smoother tread, any wear occurring while it was in the trainer would be negligible over the long haul.

Q:what is the correct 17inch alloy wheel air pressure size. cos i put 32 in each tyre. it low profile tyre

I am not sure but i know you can learn on line or at a store.

Q:Which is better Kelly tires or good year? I live in MN so it snow alot.

Kelly is a "private label" tire brand owned and manufactured by Goodyear. Like all private-label tires they tend to be older designs using older technology. As someone who works in the tire industry and also lives in Minnesota I would love to make some specific recommendations, but need to know the year/make/model of vehicle and preferably, also the tire size. Personally on all of my vehicles I use two sets of tires - one for winter use only and the other for the rest of the year. So-called "all-season" tires are not appropriate for Minnesota winter driving IMHO. Many all-season tires are not even tested in winter conditions before being offered to the public. Also, all-season simply means the tire is rated for moderately cold temperatures (45-deg F) and "light snow". In Minnesota we frequently see severe snow, ice and sub-zero temperatures and all-season tires simply can not handle that.

Q:Which number in the tire size determines the profile of the tire.and is the smaller the number the lower profile

Depends on how (which system) is used to size tyres. With old inch designation (EX 28X4.00X18) the first number is the OD of the tyre (from this subtract the ID or wheel size then divide by two,now figure the percentage of the width and this is aspect ratio) Used on older bikes through about 1940. Some Coker MC tyres still use this, so do some LT and SUV tyres. With newer inch designation (EX 5.10H16 4pr) the aspect ratio is normally 90% (the ply rating is not always added) Used on most Anglo and American bikes. With alphabetical (alphanumeric) designation (EX MT90-16 B) the number following alphas is the aspect ratio in percentage. Used on most Euro bikes. With SI (although it is incorrect this is usually refered to as metric) designation (EX 130/90-16 67 H) it is the number following the / Once used on only Jap bikes, has now become common on all newer bikes including HD

Q:can you bye second hand tires from any sort of tire/mag place?

You can fix that very easily. I'd buy a decent used starter they're only about 15-20 bucks at a junk yard.