Tom Thumb Mullen

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Width
Thickness

The Tom Thumb is similar to the Ring bits or Dutch Gags and introduces poll pressure as well creating leverage on the mouthpiece. The main difference however is that instead of the additional rings at the bottom it has an extended shank with a ring on the end, this shank is bent and set to run at 45° the effect this has is to ease up the poll pressure and leverage on the mouthpiece.

The Mullen is a strong bit which creates direct pressure on the tongue. Used for a strong older horse and will also bring the head down.

material-oxidisation

Tom Thumb Mullen
Breed Mouth Width 1 4
Bit Adjustment 2 Bit Width 3 4
Arab 115 mm (4½") 5 mm + 0 mm  120 mm (4¾")
Austrailian Stock Horse 120 mm (4¾")  125 mm (5")
American Quarter Horse 120 mm (4¾")  125 mm (5")
Thoroughbred (15h-15.3h) 120 mm (4¾")  125 mm (5")
Thoroughbred (16h+) 125 mm (5")  130 mm (5⅛")
Warmblood 125 mm (5")  130 mm (5⅛")
Large Warmblood 130 mm (5⅛")  135 mm (5¼")
Other MMS  MMS + 5 mm
Notes:
1 The measured width of a horse's mouth (from corner to corner with no wrinkles) rounded up to the nearest 5mm. These are typical values for the breed. MMS = Measured Mouth Size. Click here for more information on measuring your horse's mouth
2 Factors to be added to the measured width of a horse's mouth to ensure the bit width is calculated correctly. This varies depending on the mouthpiece and cheekpiece of the bit. For this bit add 5 mm for a loose ring cheek piece, to allow for space between the ring and the horse's lip, eliminating a possible pressure point and pinching. A fixed mouth piece does not require any additional width to be added to the measured width of the horse's mouth.
3 The width of the bit for a optimal fit, taking into account its components and the width of the horse's mouth. If calculating a bit width based upon a previously purchased Bomber bit, please make sure all relevant adjustments for differences in cheek and mouth pieces are adhered too.
4 Measurements in inches are approximate.

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