Over all height of the Predator 10K is around 65". Never use a "Spring" on it either. If you get the Single Coil 10K, it will have a longer stinger on it, than the Dual Coil 10K, so it will flex more when you hit tree-limb's. However, the Dual Coil 10K is a little shorter in height. And it will have a shorter stinger, which will not flex as much...
The 27" shaft 10K is going to be the one you would want. You'll just have to decide which one to get...Single Coil, or Dual Coil...Either way...The Predator 10K is the best, and light'est on the market to date.....
IF, you happen to brake-it, hitting tree's, just call Kale, tell him what broke, and he will fix-ya-up, with a new peace to get ya back in buissness! All parts of the 10K can be replaces by unscrewing them!

This is the only antenna I have used, where you can do that.