This is the Giant P-SL1 Tire, with their front/rear-specific compounds and high-volume casings,
Giant’s P-SL1 Tires offer superior speed, handling, and an amazing ride. The handy built-in wear indicator lets you know when it’s time to replace them before they fail.
Features:
High performance front and rear specific tread rubber
Sticky 60/64/60 durometer front tread
Durable and fast 64/70/64 durometer rear tread
Centerline wear indicator molded into tread
Folding Kevlar™ bead
60 TPI nylon casing
Weight: 200g(23C)
Options: 23C/25C