Instructions and tips for users

Instructions and tips for users

Instructions and tips for users form a constituent part of the Warranty and Complaint Conditions of MITAS Motorcycle and Scooter Tires and Tubes

• Tires are the only part of a motorcycle in contact with the road surface. Safety at accelerating, braking, steering and cornering thus depends on a relatively small contact surface between the tire and the road. It is of utmost importance that during use tires are maintained; tires may only be replaced by the authorised personnel.
• Tire manufacturer, since incorrect tire use can have a negative impact on the behaviour of a motorcycle, safety during riding as well as tire wear and tear.
• Always read and follow the instructions issued by the motorcycle manufacturer.
• The MITAS tires for motorcycles may only be mounted on motorcycles. Using these tires on any other vehicle could be hazardous. For further recommendations with regard to tire mounting, please contact Mitas a.s. or Savatech d.o.o..
• The surface of a new tire is very smooth, which is why, we recommend driving carefully for the first 100 km to run it in.
• Drive carefully. Excessive accelerating, braking and cornering significantly reduce the service life of a tire.

INSTRUCTIONS FOR MOUNTING A TIRE

TUBE-TYPE TIRES

Mounting procedure:


• When replacing the tire, use a new tube too.

• Make sure that rims are clean and well preserved.
• Check the condition of the rim and the flap and, if required, change the flap.
• Slightly inflate the tube.
• Position the tire in accordance with the designation ROTATION on the wall-side.
• Using a special tool mount the tire (finish at the valve). Use a special emulsion to simplify the mounting procedure.
• Inflate the tire up to the pressure of 3.5 Bar and check the position of the tire bead and the tube. If the position is incorrect, deflate the tube and correct the position of the tube and the tire bead. Re-inflate the tube until the tire bead fits in the correct position on the rim.
• Adjust the tire pressure up to the value specified by the motorcycle manufacturer.

Dismounting procedure:

 • Remove the valve insert and completely deflate the tire.
• Push both tire beads from the rim.
• By means of a special tool remove the tire from the rim.

TUBELESS TIRES

Mounting procedure:

• When replacing the tire, replace the valve too.
• Make sure that rims are clean and well preserved.
• Apply special emulsion to the rim and the tire bead.
• Position the tire in accordance with the designation ROTATION on the wall-side.
• Using a special tool mount the tire (finish at the valve).
• Inflate the tire until the tire bead correctly fits in the rim seat (it should slide over the TL edge on the rim) and carry on up to the pressure of at least 3.5 Bar to assure that the tire closely sits on the rim. (It is recommended to inflate the tire without a valve insert.)
• Adjust the tire pressure up to the value specified by the motorcycle manufacturer.

Dismounting procedure:

 • Follow the procedure for tube-type tires.

INSTRUCTIONS FOR STORING

• Stored tires may not be loaded, squeezed or stretched, since this can permanently deform the tire.
• In the case of a short-term storage (up to 4 weeks), tires may be stored in a horizontal position, one on top of one another up
to the height of 1.5m but only if a carrying carton in inserted in tires.
• For longer storage periods, tires should be stored in a vertical position and slightly turned around once per month.
• Store tires at the temperature of below 25°C, even better below 15°C. Deformations are more likely if temperatures are higher. Prevent a direct contact with heat, radiators and hot pipes. Low temperatures can unfavourably affect tires. Before use, cold tires are to be warmed up to 25°C.
• Store tires in ozone-free spaces (away from electrical motors and other electrical equipment, which can produce sparks and other discharges that can cause or increase the concentration of ozone in the space), and spaces that are free from oxygen and chemical substances such as fuels, greases, chemicals, acids or disinfectants.
• Store tires away from sharp objects, which could damage rubber surface (sharp metal parts, wooden parts or other sharp objects.

COLOURED TIRES

• General storing conditions have to be considered at storing coloured tires. Furthermore, it should be considered that a coloured sidewall is extremely sensitive to dirt and direct exposure to sun light, which is why, tires should be wrapped-up in foil and stored in a dark space.

FURTHER INSTRUCTIONS, TIPS AND TECHNICAL INFORMATION

MAINTENANCE OF A TIRE

INFLATION PRESSURE

• It is of extreme importance that the specified inflation pressure is maintained. Driving with inadequately inflated tires can be
very hazardous. If tires are underinflated, the temperature rises, which can result in an abrupt tire destruction. Tire pressure
can further define the service life of a tire. A correct inflation pressure ensures the maximum distance travelled along with a
satisfactory stability, driving comfort and road grip. Tire pressure maintains the shape of tire.
 Insufficient pressure or incorrect mounting accelerates tire wear and tear and additionally loads the tire carcass.
 Excessively high pressure can cause tire wear in the centre of the tire tread, and increases potential of tire tread cracks.
• Inflate tires to the value specified in the manual for use of motorcycles.
• Maintain the specified pressure as a minimum inflation pressure. If driving fast, increase the pressure by 0.2 Bar; if driving with a lot of luggage, increase the inflation pressure in the rear tire by 0.2 Bar.
• Using a calibrated pressure gauge, check the inflation pressure at least once per week when the tire is cold and always before making a longer trip.
• Consider the fact that the pressure increases when the tire is hot, and decreases when the tire is cold. The pressure can also drop if a valve insert does not fit well or is worn-out.
• Check the valve insert, screw it or replace it if required.
• Always place the valve cap (screw tightly), which functions as a seal preventing dust from intrusion.
• In the case of tubeless tires, maintain the valve or replace it when mounting a new tire.
• When replacing a tube-type tire (mounting with a tube), a new tube should be used. Tubes stretch during use. A repeated use of an already stretched and, consequently, thinner tube can increase the chance for a tube puncture and an abrupt pressure loss, which can aggravate the stability of a vehicle and cause a fall.

MOTORCYCLE TIRE

• Assure a sufficient distance between the individual motorcycle parts (mudguards, forks, transmission chain) and the tire mounted on the rim.
• During rides at higher speeds the outer dimensions of a tire enlarge as a result of a centrifugal force. The increase can be even
larger with a diagonal tire; therefore, do not change the nominal tire dimensions.
• Due to a danger of a contact between the tire and the motorcycle parts, and developing uneven wear and tear, make sure that the wheel base is correctly adjusted after transmission chain becomes worn-out.

TIRE AND RIM

• Suitable flaps have to be used with spoke wheels. Regularly maintain flaps since the protruding spoke head can damage and
puncture the tube.
• Correctly balance the tire on the rim and regularly examine it. In Slovenia, the legally specified tread depth amounts to 1 mm
(in Germany to 1.6 mm) over at least 3/4 tire tread width, however , we recommend to replace the tire earlier, since wornout
tires are more likely to get damaged, and have poorer road grip, particularly on wet surfaces. Damaged tires can be very
dangerous and should be immediately replaced.
• Immediately eliminate rocks and nails pushed into the tire tread, since they can puncture the carcass, cause a failure and,
consequently, an accident. The main benefit of a tubeless tire is that despite being punctured with a nail, an abrupt pressure
drop is not possible. Yet, if a driver is not aware of a tire failure and continues the ride, the damage can spread and become
hazardous.
• If the pressure drops, the tire has to be removed from the rim and inspected, the reason for a pressure drop is to be established
prior to any repair.
• We strongly advise against any repairs of the tire shoulder and sidewall area.
• Furthermore, we strongly advise against any repairs of the P speed category tires or higher.
• It is not allowed to repeatedly use a damaged TL tire with a tube.
• The tire can behave differently in contact with oil or fat, therefore clean it with a cloth soaked in benzene.
• MITAS tires are manufactured with a minor mass imbalance. To achieve a perfect mass balance of the tire and rim construction
an additional balancing procedure is required for driving at higher speeds.
• Motorcycles may be used only with the rims specified by the vehicle manufacturer. The use of suitable rims is of importance
for a stable ride and other driving characteristics. If the tire is mounted on a too narrow or a too wide rim, this can lead to a
change in the tire tread shape, which negatively impacts the driving characteristics in general.

TIRE TREAD WEAR AND TEAR

Different factors can cause an abnormal tire wear and tear:
 Insufficient pressure or overload can deform the surface and result in incorrect wear. It can come to a sudden defect in the carcass as a result of excessive bending and a sudden air release.
 High speed, heavy accelerating and braking.
 The temperature of driving surface (higher temperature results in higher wear).
 A rough driving surface (the rougher the surface, the higher the wear and, consequently, the shorter the service life).
 Mechanical irregularities such as deformed wheels, incorrect brake adjustment, poor-quality shock absorbers, a too large gap between the wheel bearings, etc.
 Unbalanced rotation mass of the tire and rim construction.
 Incorrect adjustment of the rear wheel when replacing or adjusting the transmission chain. Each rotation of an incorrectly adjusted rear wheel causes additional and uneven wear of the tire tread surface and has a negative impact on driving characteristics of a vehicle, which can lead to a loss of stability during the ride.

TECHNICAL INFORMATION

BASIC EXPRESSIONS

• M/C – tires for motorcycles for mounting on the rims of motorcycles whose tire bead seat diameter differs from the rims having the same designation but are used for passenger or commercial /delivery vehicles.
• MOPED – tires constructed for motorcycles which achieve the speed of 50 km/h or less.
• MST- tires for special purpose motorcycles with a wider tire tread than comparable dimensions with the same designation.
• NHS – tires for motorcycles designed for the off-road rides. Their use on public road surfaces is not allowed.
• M+S – tires designed for the use in mud and snow (winter tires).
• PR – designates various versions (load index/inflation pressure) of tires having the same dimension designation.
• REINF – motorcycle tires for load and inflation pressures exceeding the standard values.
• TUBELESS – tires which are specially designed for tubeless mounting on suitable rims.
• TUBETYPE – tires specially designed for mounting with a tube.

TIRE PARTS

Ever since the construction of the first motorcycle, a hundred years ago, special tires for motorcycles have been designed. The
development of tires has been remarkable through the decades. We have several types of tires available, which differ according
to their basic construction as well as their appearance. The appearance and the construction depend on the motorcycle type.
Irrespective of the fact whether it is about scooter, enduro or road tires, they all have the following parts in common:
 Tire tread – the upper tire part, which contacts the road surface. Tire tread pattern and rubber compound ensure a grip on the road or off-road as well as water drainage from the tire. The grip depends on the rubber compound. As a rule, the tire made from a softer compound has a better grip and a shorter service life, whereas the tire made from a harder compound has a worse grip and a longer service life.
 Sidewall – it includes all the important data: speed symbol, load index, name of the tire, manufacturer, country of origin, the ECE homologation number and others. During the ride, the sidewall transmits lateral forces, throttles oscillations and prevents tire deformations.
 Carcass (armature) – is the carrying part of the tire, it ensures its shape regardless the forces developing during the ride. It can be made of two or more cord layers. Cord can be made of rayon, nylon, polyester or Kevlar, individual parts of the carcass can be steel-reinforced.
 Tire bead – provides a close connection with the rim and prevents the tire on the rim to move. It is made from a wire bead and layers of rubberised cord wrapped around the wire bead. In this way, the tire wins a required rigidity in the bead area, controls accelerating and braking forces and transmits them onto the suspension. In the case of tubeless tires, the tire bead prevents a loss in inflation pressure.

TIRE CONSTRUCTION TYPE

With regard to the carcass type, tires can be divided in the following categories:
 Diagonal tires – with the longest tradition and most spread in the market. The carcass of a diagonal tire is composed of two or more textile cord layers (rayon, nylon, polyester), which are crossed at certain angles. Diagonal tires are the right choice for smaller motorcycles with a lower cubic capacity, scooters and older motorcycles whose chassis is adapted to diagonal tires.
 Diagonal belted tires are actually diagonal tires with a reinforced diagonal belt under the tread surface. These tires are designated with the B letter (diagonal belted tires), e.g. 130/90B15. These tires are ideal for higher cubic capacity motorcycles whose chassis is not adapted to radial tires and demand for stronger tires.
 Radial tires – have a carcass with a cord layer placed at a 90°angle in driving direction. To stabilise the tire tread surface, the reinforcement cord belts are placed over the carcass. Radial tires are the right choice for motorcycles with higher cubic capacity since they have to transmit strong forces onto the road, which develop at accelerating, braking and cornering.
Radial tires have many benefits, the most important one being the ability to reach high speeds. Due to a centrifugal force, the temperature in the tire increases, which can damage the tire, aggravate the road grip and increase tread wear. The radial construction eliminated almost all disadvantages of diagonal tires. The behaviour of a tire in limiting conditions is better predictable.
 Steel cord-reinforced radial tires have additional steel cord placed under the tread surface. The final result is a more rigid carcass which delivers optimum riding performance as the tire wears and also through its entire lifetime.

SPEED INDEX

The speed index marks the highest allowable speed of a tire with loads specified in the load index, and in driving conditions as defined by Mitas a.s.
Speeds are listed on www.mitas-moto.com and apply to tires in good condition, properly inflated, with permissible specific load and mounted on suitable rims. The speeds listed in the table are the highest permissible speeds and should not be considered as the ordinary speeds.

LOAD INDEX

The load index is the numerical code, which stands for the highest tire load allowed (except for loads at speeds over 210 km/h) at speeds marked with the speed index in the driving conditions as specified by MITAS. The loads are listed on www.mitas-moto.com. Worn-out tires are replaced, make sure that the new tires are of the exactly the same or higher speed index and of load index as specified by the motorcycle manufacturer.

Mitas wishes you a pleasant, safe and comfortable ride with your motorcycle.