Wire traces and titanium leaders are absolutely pike-proof.

In most situations, fluorocarbon leaders are the ideal choice. If pike are present in the water, though, you should consider switching to a pike-proof leader.

That depends on the material, the technique you're using and the conditions on the day. Pike-proof leaders are usually 20-40 cm long, while fluorocarbon and mono leaders tend to run 40-100 cm or longer.

There are several reasons for this. Leaders are generally more abrasion-resistant, less visible, have a degree of stretch and are sinking - and some are pike-proof. Put all that together and there are real advantages to adding a leader in front of your main line.

Wire, titanium, fluorocarbon, hard mono and monofilament line.