Originally Posted by
nubcake
Your still not out of a ride though, just use the limit screws to set the derailer in a suitable gear and the bike is still very ride-able until the new part shows. You even have a 2 or 3 speed if you have a double or triple up front.
That is true in that PARTICULAR case. There are breakdowns that make bike not rideable and if you can't find parts quickly, or at least not at a decent price, a backup bike comes in very handy. You can SURVIVE without a backup bike, but it is a very, very, very useful thing to have and doesn't cost much. Just like a second pair of jeans.