bike parts

We've decided to bring our bikes. Just wondering if there are any places to buy bike parts - tires, chains, tubes etc... any good well stocked bike shops in town. Or, should we bring some spare tubes etc...

Bi-Zihuanas has two shops, one in Centro Zihua and the other in Ixtapa. Both have plenty of bike equipment for sale. The Ixtapa shop rents bikes. There are also other well-stocked shops in towns.