This post ranks high on the geek meter so prepare yourselves. This post involves racing, gadgets, geek stuff, chemical reactions, Mentos and wasting large amounts of diet coke.
Now that you have been warned. I just got a great idea for my next 70.3. I am going to strap 108 diet coke bottles to the back of my bike and drop Mentos in them. These guys made a Mentos powered car that can hit 18 - 19 mph (which is better than my lazy legs can ride somedays). I just need to figure out a way of having the reaction last for 56 miles. Sure beats months of training.
I have to say this was not originally my idea so I will give credit where credit is due.
Eepy Bird Coke Zero and Mentos Rocket Car Mark Two
How to Build a Rocket Car Powered by Mentos and Coke