I know the thread is a tad old...but hopefully someone recommended to ZiggysMom that she should change her tire size. This will not only improve wheel durability but make the bike ride much better too,
700 x 23 is pretty common for a Specialized Dolce. However, once a rider clears about 170 they should start to consider moving up to a 700x25 tire.
At 200 the bike will behave much better, be more stable in braking/cornering and actually be faster AND more comfortable with 700x28.
We have had good luck getting the Continental 28s in Dolce frames.