III - Pressure

General

Adhere to the pressure recommended

by the vehicle manufacturer, regularly

checking that this is proving suitable for

your particular use of the bike

TYRE PRESSURE

If a tyre is inf lated when hot, the pressure must be adjusted in line with

manufacturer recommendations. To be correct, you should be aware that

the pressure may be around 0.3 bars higher than the recommended level

when cold.

example:

• Hot tyre pressure reading = 2.6 bar

• Recommended cold pressure= 2,5 bar

• What we should read = 2.8 bar

• Add 0.2 bar

Inf lation with nitrogen

Does not mean that frequent pressure checks are not to be made. After

checking the tyre pressures do not forget to replace the valve cap which in

addition to the valve body ensures an airtight seal

Valve cap

A valve cap is essential to ensure a correct airtight seal In fact at high

speed the valve body can be pushed in by simple centrifugal force

This leads to a loss of pressure and the risk is eliminated simply by f itting a

valve cap

These recommendations apply to tyres for

use on the road On a track and for racing in

general there are special recommendations

for this type of use

Manufacturer tyre pressures are carefully

arrived at and are safe and ef fective, however

the possibility exists that on rare occasions

they can prove to be less than perfect.

If the tyre starts to exhibit any signs of uneven

or abnormal wear when using recommended

tyre pressures then seek expert advice.

Riding with underinf lated tyres may result in

complete tyre failure and subsequent loss of

control of the vehicle

Useful tips

• Check tyre pressure every 2 weeks and when cold (a tyre that has not run for at least 2 hours or has run for less than 3 km at a reduced

speed).

• Adhere to the pressure recommended by the vehicle manufacturer regularly checking that this is proving suitable for your particular use

of the bike.

• A tyre should never be def lated when hot.

• After checking the tyre pressures do not forget to replace the valve cap which in addition to the valve body, ensures an airtight seal.

• Inf lation with nitrogen does not mean that frequent pressure checks are not to be made.

If a check is made after use, it will be made on a hot tyre. Since pressure

increases with the temperature, a tyre should never be def lated when hot.

MICHELIN Motorcycle and scooter 172

Technical data