Tires

What to Know: Tires are your bike's point of contact with the road. Those with serious mileage have less road feel, and are more likely to suffer a flat.

Upgrade to: Michelin Pro4 Service Course. Tough enough for training, yet light enough to win races, these 200-gram tires with 150 TPI casing resist flats, while a high-traction coating helps them last long miles. [$75; bike.michelinman.com]