Brake Caliper Pair in Alabama

Salt air reaches the hardware from the outside

There is no road salt to speak of, so a caliper here corrodes from the outside in rather than from underneath. Salt-laden air settles on the pins, the clips and the pad abutments — the parts that have to move freely — and on anywhere aluminium meets steel.

It is slower than a northern winter and it reaches the same place. Anti-seize on the hub face and the fastener threads at every brake job is two minutes that saves an hour.

Mobile Bay humidity keeps everything under the car damp long after the rain has stopped.

Damp air, and brakes that never dry out

Cast iron rusts whenever it is wet, and in this climate a car is damp far more of the year than it is dry. On a vehicle driven hard the pad sweeps the rotor clean twice a minute and it never matters; on one doing short journeys it never gets hot enough for long enough to dry out.

The result is a rotor face pitted while still well above minimum thickness, and slide pins seized without ever having done much work.

Does this state inspect your car

The federal record of state safety inspection programmes from 1929 to 2015 lists Alabama in neither of its columns — it is not among the states requiring one, nor among those that repealed one. A dragging caliper is found by whoever looks at the pads, which in practice means after one pad is gone and the other still looks new.

What goes on the roads in winter

Interstates, bridges and overpasses get pre-treated with salt brine, which is rock salt and water mixed together rather than salt spread dry. Road treatment gets past the dust boot, and a piston that has corroded in its bore drags the pad against the disc for the rest of its life.

Eight months of cooling load

Alabama's cooling season runs from roughly March to October, and on the Gulf Coast it barely stops. That is a duty cycle for both the engine cooling system and the air conditioning that a temperate climate reaches for a quarter of the year.

Two systems, both working continuously, and both with less margin than they look.

What else Alabama does to a car

An eight-month cooling season means the belt-driven accessories are loaded for two thirds of the year rather than one.

What we hold, and what it costs

10 options from Cardone, Centric, Dorman, Power Stop and Raybestos, from $219.99 to $349.99. Prices are firm — where we have no price we publish none.

We are a reseller rather than a manufacturer: we source the part, check it over and sell it, and we confirm it against your year, make, model and engine before it ships rather than asserting a fit on the page. We ship anywhere in Alabama, including Birmingham, Huntsville, Montgomery and Mobile.