CONTAGEM BRANCH
The side of a tire talks. Hardly anyone listens.
Every tire leaves the factory with a sentence raised in rubber along its flank: size, construction, how much weight it carries, the top speed it was certified for and the week it was made. It is all there, within arm's reach.
On this page GV Pneus e Serviços spells that sentence out piece by piece, so your next replacement starts from a reading instead of a hunch.
Taking 205/55 R16 91V apart, one chunk at a time
The size above is simply a common passenger car fitment. Field order is standardized, so the same reasoning works on the tire sitting on your car right now: only the numbers change.
In millimeters, wall to wall, with the tire mounted and inflated. A 205 puts a little over eight inches of tread across the road.
Not a direct measurement: it is the sidewall height written as a share of the width. Here, 55 percent of 205 mm. Lower numbers mean a shorter, stiffer flank.
R stands for plies laid radially across the casing, the build found on virtually every car tire sold today.
In inches. It names the wheel the tire seats on; a 16 inch tire goes on a 16 inch wheel and nothing else.
A code rather than a weight. Looked up on the standard chart, 91 means 615 kg, about 1,356 lb, per tire at the pressure the carmaker specifies.
The letter gives the top speed the tire was approved for while carrying its rated load. V is 240 km/h; H is 210; T is 190.
The last four digits of the DOT code: the first pair is the week, the second pair the year. 2224 reads as week twenty two of 2024.
Alignment and balancing: two jobs with look-alike names
Alignment sets the angle of the wheels against the body and against each other. In the drawing the fronts point a touch inward: that is toe-in, adjusted inside a window the vehicle maker defines. Camber and caster finish the geometry. Outside the window, the car drifts to one side and the tread wears along a single edge.
Balancing deals with how mass is spread around the wheel and tire. Small weights clipped or stuck to the rim offset heavier spots; skip them and the steering wheel shakes within one particular speed band, usually on the highway.
Both are listed as a secondary activity on this branch's registration, next to the retail sale of tires and inner tubes, which is the main one.
Things worth a stop at the shop
Not a diagnosis, just a watch list. Any of these, spotted calmly in a parking lot, is reason enough to have the car checked.
- Tread worn harder on one shoulder than the other.
- Steering wheel off center while driving straight.
- A shake in the wheel that comes and goes with speed.
- A bulge or cut on the sidewall, however small.
- Grooves down to the wear bars molded into the tread.
- An old build date on a tire that has barely been driven.
Inner tubes: when they still matter
Most cars today run tubeless tires, sealed where the tire bead meets the wheel flange. Inner tubes have not gone away, though, and that is why they share the name of this branch's main registered activity.
When TUBELESS is not molded on the sidewall, the tire was built to run with a tube. Spoked wheels, some older utility vehicles and implements tend to fall here. The tube must match the rim size and suit the width range, which is printed on the tube itself.
- TUBELESS on the flank
- Mounts straight onto the wheel, no tube.
- TUBE TYPE on the flank
- Needs an inner tube in the matching size.
- Neither word present
- Ask before mounting; the rest of the marking settles it.
The right pressure is not on the tire
The sidewall states the maximum pressure the casing can hold, and that figure is not your everyday inflation. The pressure for your car comes from the carmaker, on a placard that usually sits on the driver's door jamb, inside the fuel flap or in the owner's manual.
- Check with the tires cold, before driving or after a long stop.
- Use the placard value for the load you will carry; many list two rows.
- Include the spare, the most forgotten tire on any car.
Identification tag
- Legal name
- GV PNEUS E SERVICOS S/A
- Trade name
- GV Pneus e Serviços
- CNPJ
- 13.922.209/0004-05 (branch establishment)
- Legal form
- 205-4, Sociedade Anônima Fechada (privately held corporation)
- Main activity
- 45.30-7-05, retail sale of tires and inner tubes
- Secondary activity
- 45.20-0-04, wheel alignment and balancing for motor vehicles
- Address
- Av. João César de Oliveira, 1077, Eldorado, Contagem, MG, 32310-000, Brazil
- Phone
- +55 31 3395-6377
- contato@lightfootmornings.com
Got a photo of your sidewall? We will read it with you
Write in with the size printed on the side of your tire, or call the branch. Questions about an equivalent size, a load rating or wheel geometry go faster with the exact figures at hand.