The siping isn’t for water dispersion; it’s actually to reduce the tire’s footprint on the ground. Michelin explained that eliminating rubber from the tread reduces the contact patch, thus increasing pressure on what is contacting the ground. The higher durometer rubber allows the tire to remain rigid and retain its footprint, while also helping thwart punctures since water acts as a lubricant, helping debris puncture through the rubber more easily than on a dry day. Also aiding puncture resistance and overall durability is a Kevlar breaker that stretches from tread to mid-way down each sidewall. The Grip uses the same 110 TPI casing found on the Service Course and weighs in at 220 grams. Pricing is set at $74.99.