Sliver, red or blue label?
The e-commerce section of website velo.pirelli.com provides detailed guidance on the choice of your ideal tyre. For instance, you will find an overview of the P Zero Velo range, which lets you compare the characteristics and gain a better understanding of what you are after in a new tyre. An analysis of your riding habits and what performance aspects are most important to you will help you select the most appropriate model. You should consider a multiplicity of factors: how much you use the bike, type of terrain you ride on most often, whether for training or racing, and seasonality is also taken into account. Changing atmospheric conditions, in fact, lead expert cyclists to choose fast and slick tyres for the warm seasons, such as P Zero TT (red label), or the versatile P Zero (silver label), and mount different tyres for the cold seasons, so as to profit from the outstanding puncture protection and grip offered by P Zero 4S tyres (blue label).
The importance of size
To change a tyre, or buy a new one, it is essential to understand what you are currently mounting. The size of P Zero Velo tyres is expressed according to the ETRTO code (e.g., 25-622) and the so-called “French code” (e.g., 700x25c). The two-digit number indicates the width (in mm) of the tyre when mounted and inflated properly; the three-digit number stands for the diameter (in mm) of the rim. These values are also indicated on the sidewalls of P Zero Velo tyres, together with direction of rotation and the inflation pressure required (in Bar and PSI).
Nowadays, many cycling enthusiasts choose wider tyres, 25 mm or even 28 mm wide, believing they are more comfortable and faster than traditional sizes. P Zero Velo and P Zero Velo 4S are available in 700x23, 25 and 28c versions, while P Zero Velo TT tyres come in a 700x23 c version.