Original Fitment Tyres are list in the genuine parts catalogue for each model. Alternative tyres are listed here.

What do the letters and numbers on a tire mean?

The most important label is the sizing designation, which for example could read "120/70ZR17." This label indicates section width (120mm), aspect ratio (70 percent), speed rating (Z), construction (R), and wheel diameter (17 inches). This tire has a speed rating of "Z" or more than 149mph, and is a radial (R) construction.

In Short: 'Section Width (mm)' / 'aspect Ration (%)' - 'Wheel Diameter (Inches)' 'Load Rating' 'Speed Rating'

Speed Rating	Max MPH	XXXXXX	Load Rating	Max kg
N	87		51	195
P	93		52	200
Q	99		54	212
R	106		55	218
S	112		56	224
T	118		60	250
H	130		62	265
V	149		64	280
W	168		66	300
Y	186		68	315

Model Front Wheel Front Tyre - Bar Rear Wheel Rear Tyre - Bar Solo-2 up Cosa 2 125 / 200 2.50x10 100/90-10 T 1.5 2.50X10 100/90-10 T 1.75-2.0 Vespa ET2 50 two stroke 2.50x10 100/90-10 53L T/L 1.3 3.00X10 100/70-10 54L T/L 1.8-2.0 Vespa ET4 50 four stroke 2.50x10 100/90-10 53L T/L 1.3 3.00X10 100/70-10 54L T/L 1.8-2.0 Vespa ET4 125 four stroke 2.50x10 100/90-10 53L T/L 1.3 2.50X10 130/70-10 62L T/L 1.8-2.0 Vespa ET4 Leader 125cc four stroke 2.50x10 100/90-10 53L T/L 1.3 3.00X10 120/70-10 54L T/L 1.8-2.0 Vespa LX 50 2T 2.50x11 110/70-11 45L T/L 1.4 3.00X10 120/70-10 54L T/L 2.0 Vespa LX 50 4T 2.50x11 110/70-11 45L T/L 1.4 3.00X10 120/70-10 54L T/L 2.0 Vespa LX / Vespa LXV 125 2.50x11 110/70-11 45L T/L 1.6 3.00X10 120/70-10 54L T/L 2.0 Vespa PX 125 2.10x10 3.50-10 51J T 1.25 2.50X10 3.50-10 51J T 1.75-2.3 Vespa PX 150 2.10x10 3.50-10 51J T 1.25 2.50X10 3.50-10 51J T 1.75-2.3 Vespa PX 200 2.10x10 3.50-10 59J T 1.25 2.50X10 3.50-10 59J T 1.75-2.3 Vespa GT 125 / 200 four stroke 3.00x12 120/70-12 51P T/L 1.8 3.00X12 130/70-12 62P T/L 2.2 Vespa GTS / GTV 250 3.00x12 120/70-12 51P T/L 1.8 3.00X12 130/70-12 62P T/L 2.2 Vespa T5 Classic 2.10x10 3.50-10 59J T 1.23 2.50X10 3.50-10 59J T 1.75-2.3