They are typically heavier than a "normal" tire, so the rotating mass will slow you down.

What are the disadvantages of "puncture proof" (or puncture resistant) tires?
I have a big spreadsheet in google docs with many formulas like this: =MIN(C3;C4)/500+4. Now we need to add $ before every cell row/column to make it absolute. So, the formula should look like this: =MIN($C$3;$C$4)/500+4.

Is it possible to replace all these names in bulk, so I won't need to manually change each of them? Probably, a regexp could be used.
