Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Michelin Krylion Carbon Road Tire
Product description: Ideal for racing or long-distance training, the Michelin Krylion Carbon Road Tire combines exceptional durability with superb grip in dry or wet weather. Carbon infused tread lasts 30% longer than Michelin's Pro 2 Race and holds its own in the corners. It's highly resistant to cuts and punctures, rolls fast and gives a smooth ride. Michelin's longest lasting, road training tire is ready to pack on the miles. Carbon-reinforced smooth tread is resistant to micro cuts Thicker center tread increases mileage by 30% over the Pro 2 Race 127 TPI cross-ply carcass for an extra supple ride Bead-to-Bead Puncture Protector protects the entire casing from debris High Protect Rim System protects the tire from rim-bead friction
Product feature: Carbon-reinforced smooth tread is resistant to micro cuts, Thicker center tread increases mileage by 30% over the Pro 2 Race, 127 TPI cross-ply carcass for an extra supple ride, Bead-to-Bead Puncture Protector protects the entire casing from debris, High Protect Rim System protects the tire from rim-bead friction
Product brand: MICHELIN
Target attributes: Size
Answer: attribute: size
value: None
source: None