Tyres

What are good tyres?

I've read elsewhere the standard factory issue PX tyres are not the best. Should I consider replacing and if so any recommendations to increase safety?

The tyres supplied with scooters are generally the lowest cost to meet the country standards (PX's in Australia come with Michelin S83's). It does not make good business sense to do otherwise. Below are a list of good tyres:

• Sava MC18/MC20 (these are speed rated to 150Km/hr)
• Michelin S1's (are better that S83's but are still only rated to 100Km/hr)

What does the tyre rating mean?

Refer to the Sava overview for what the numbers translate too: Tyre Rating Information 

e.g. "J" = Speed category 100 km/hr, "51" = Load index of 195 kg.

A detailed example of the test procedure is found in Australian Design Rule 23/00 (below).

A brief summary is that the a "51J" rated tyre has to last 20 minutes at 93 km/hr, with correct pressure and a load of greater than 80% of maximum (i.e. ~160Kg). A "51P" rated tyre has to last 20 minutes at 143 Km/hr.

"Last" means "After completion of the high speed test specified in Clause 23.3.5 no tyre shall have ‘Tread Separation', 'Ply Separation', 'Cord Separation', 'Belt Separation' or 'Bead Separation', 'Chunking' or 'Broken Cords'."