However, my bike was bought used and the front tire was not the original, the rear one was and I wanted to have both tires of the same footprint and brand. The footprint of the original rear tire gave the idea of a double purpose tire. Very nice compromise indeed.
I replaced the original rear tire and front with Continental Zippy 1's. I love the feel, comfort, silence and grab of these tires. I haven't used them in rain, but I've climbed improved roads and they seem well planted.
Here in Costa Rica all the Vespa PX's that are used for running errands commercially had Pirellis. Later came Indian brands, and others cheaper but with less thread life. Others had great thread life but very little friction. I wanted Pirellis for my ET4, but the salesman in Vespa Orlando said they lasted very little. In a car that I had, Continentals were the OEM's and I thougt it was a good brand of tire. I'm hooked on Contis right now.
My suggestion would be to keep both tires with the same footprint and brand to keep the good ride your LX is famed for and featured in German Magazine ADAC Autowelt, showing a girl leaning the LX like she was riding a Ducati. It impressed me!
Perhaps it is more economical to replace only the rear tire with the same brand, size and footprint of the OEM tire. Then when both tires front and rear are ready to replace, you can choose another brand or style of tire that suits your driving habits.
I realized that I was not going to go to improved roads with my Vespa, it's too hard on the suspension, the dust has a way to find its way inside the dampeners, the bushings, the filters, the oil, so I wanted a great long lasting tire for the road.
You will find a picture of the Zippy footprint enclosed. Make up your mind, but do not have different tire footprints in your bike.
Regards,