I only carry a revolver. That way if my bike comes up lame I just shoot it
As for tools, out on trail I carry an 18mm open-end wrench and an 8mm allen for my rear axle, Pedros tire levers (these are the only ones I have found that a 24" 3.0 Gazzaloodi wont break with multiple use), one multi-tool, CO2 inflation and a knife.
In the truck I allways have a complete tool set. Enough tools to completely build a bike and a truck for that matter
