First of all this is my first build I've added to mobafire, but i have made many many builds but I didnt upload them so tell me what I should replace in the item sequence and stuff. That is the way i like to do it.

First build is to do lots of criticals a bit quicker.
Second build is to farm epicly and damage alot of enemies at teamfights.
Third build is for more damage and still have attack speed.

I usually take Strength Quints to do early harrass with Trynadamere. Then i take Might Marks to do some more damage at late game. Alacrity Seals and Glyphs are so that you can harrass faster and sometimes u also get 2.500 attack speed with these runes.

For masteries i take the usual 21-0-9. If you get the feeling of Tryndamere if you dont like it somehow you might do it your way.

First of all you can do it two ways 1. First you buy Phantom dancer, Infinity Edge, Bloodthirster, Phantom dancer, Bloodthirster, Madred's Bloodrazors.
2. You buy Dagger, HP potion, Berserkers Greaves, Bloodthirster,Phantom dancer, Infinity edge, Bloodthirster, Phantom dancer, Sell the Greaves and buy another Dancer. I prefer the second one but it is up to you.

My favourite is E Q W Q Q R Q W E Q R W E W E R W E.
Sometimes i do it like so: E Q W Q Q R Q W Q W R W W E E R E E.

I always like to take Exhaust and Ghost for my summoner spells.
Sometimes i take Exhaust and Ignite but you don't really need Ignite because playing as Tryndamere the enemy has a really small chance to escape away.

Pros:
-Tryndamere has an epic combination of slowing and then spinning slashing torwards the enemy.
-Rage is great to do lots of damage with criticals.
-Spinning slash can go through walls.
-Endless rage allows you to turret dive easily.
-Spinning Slash is really good for farming.
Cons:
-Endless rage wont last long and ranged champions can kill Trynd after endless easily.
-Enemy has to run from you so the slow could do anything.
-Thornmail can really ruin the game for you.
-Opponents focus Tryndamere.

If you are farming alot with tryndamere, then you must remeber one thing, and that is that Tryndamere can kill alot of minions with His E spell and he also gains Rage by attacking minions So, always keep your rage high because then you do alot of critical strikes. If your rage is up then use Q spell to get health back up.

I don't mind if you change the build a bit, masteries runes and post it up but give some credits to me also :)
Have Fun!