IMPORTANT

1) If the stud is tightened too much by mistake leave it in place and not unscrew it to get the correct position

2) Check the studs every 1000 km / 500 miles and if necessary retighten them

3) Do not continue to tighten after the head of the stud touches the surface of the tire / shoe otherwise the screwed portion of the stud will rip out the rubber seat of the nail. The nail will be then not work properly, will bend and tend to come free

4) Do not fit snow chains id the studs protrude more than 3mm from the tire

STUD SELECTION

To choose the correct stud two factors have to be considered:

1 – THE TYPE OF TYRE.

We recommend using snow or off-road knobby tyres but any tyre of sufficient tread can be utilized.

2 – WHERE IT IS INTENDED TO USE THE STUDDED TYRE

The protrusion (of the nail) is a consequence given by the tire and by the field of use of the nail (competitions, off-road, road). It is advisable to use nails that are not too protruding, in the areas regulated by the Highway Code, while in private areas you can use nails with upper protrusion. In both cases, always use all the available tire rubber to be able to insert the longest nail, so that it can work at its best. Once the tire has been chosen, the depth of the tread or of the block is measured. In road use tires it is about 2mm, in snow or kneeling tires it is about 3mm. In truck tires up to 35q is about 4mm, in truck tires over 35q it is about 5mm. The measure to add to the tread is the under-tread. The sum between the tread and the under tread corresponds to the penetration value of the nail in the rubber.

ANTI PUNCTURE LIQUID

If for your application you are forced to use studs longer than those that the tire can hold and you’re going to risk puncturing the tyre is recommended to use the anti-puncture liquid. This comes in different types and brands. We suggest those that are based on a water soluble gel that can be washed away with water and that does not unbalance the wheels nor damage the tyre or the rim.

Example:

Measurement for the tread of a snow tire on a car = 8.50 mm

Add carcass cover 3.00 mm (assumed for a snow tire)

Add the two measurements 8.50 + 3.00 = 11.50 mm

You can mount a stud with “penetration into the rubber” (see table) of 11.50 mm or less.

So, the appropriate stud is type. 1200.

(NB The thickness of the carcass cover is determined by the type of tire).

WARNING: THE NAIL MUST NOT TOUCH THE CANVAS AND MUST NOT STILL BEHOLD. IT IS FORBIDDEN TO USE THE TIRE IN OPEN ROADS TO THE PUBLIC IF THE NAIL IS TOUCHES OR STILLS THE CANVAS.