I just replace the worn tire (it had lost it's roundness - like Geonz has said) and it is the back one I had to replace this year. I put a Contintental training tire on for the winter indoors. I just got 2 Hutchinson folding fusible from Pricepoint (http://www.pricepoint.com/) for $85. Considering all the shops around here wanted $75.00 for one tire, I feel very happy with that deal.