I think tire liners are a good idea for commuting. That way, I can stick with the zaffiros. But I think I should get better tires for my good road bike. The stock tires on it are michelin sport, which are $14 bucks on Amazon. I'm guessing they're not the hallmark of quality tires. And if I were to do that 100 mile race in June, I should get a good pair of tires.