All a curb bit is, is a bit with a curb chain. A curb chain is a chain that can hook on to a bit. It allows more control with the bit. About every type of bit has hooks on it that a curb chain will attatch to.
A single-bar bit with a curve in the middle and shanks and a curb chain to provide leverage in a horse's mouth.
Curb your Enthusiasum
The fatter the bar, generally the kinder the bit. Looking for a kind bit look for a fat bar, the width of which will be suitable for the horse. Whether the bit is a snaffle with one or more joints, or a curb, the fatter, the kinder. If the bit is a curb, go with the shortest shanks possible going down, and little shank above the bar. Try it with a leather curb strap first, then a curb chain - and make sure the chain lies flat.
If you're talking about a curb strap on a curb bit, then yes, it is required. If you are talking about a curb strap for a snaffle bit, then no, it is not required. Bosals do not require a curb strap. If you are talking about a chin strap for the western hat, no, one is not required. It is not required but I strongly recommend because with out it the bit has too much movement that may confuse the horse.
There are two basics kinds of bit, snaffle and curb.
It all comes down to the individual horse. The most popular type of curb bit over the years is the medium shank, low port aluminum.
A curb chain is part of a kimberwick or pelham bit. They are used when the second (lower) rein of a pelham bit is activated. The top rein is connected directly to the bit in the horses mouth and is the primary rein used to guide the horse. The lower rein is connected to the shank portion of the bit and is only used to activate the curb chain which runs under the horses chin. A kimberwick also uses a curb chain but only utilizes one rein. There are 2 positions the rein can be attached to the bit, upper and lower. Attaching the rein at the upper position means the curb chain is utilized but very mildly. Attached the rein to the lower position brings the curb chain into play more forcefully.
A kimblewick bit has a slight curb action. A snaffle can be plain or jointed but a kimblewick is normally plain.
The chin strap attaches in the back part of the bit and the rear side of the brilde.
It is called a pelham bit in English riding. In western riding, it would be called a tom thumb.Horseisle Answer- Pelham
The severity of the Tom Thumb bit can vary depending on the design and the rider's hands. Some horses may find it harsh due to the leverage action and potential for nutcracker effect on the tongue. It is important to consider the individual horse's needs and response when selecting a bit.
A snaffle is midler. A pellam is a combination of a curb and a snaffle. It has a curb chain and can be very harsh. Of course, a bit is only ever as harsh as the hands that hold the reins.