I do trials unicycling and have been using 140 mm Lasco cranks for about a year. Over time the square holes that fit on the hub have been rounded of, so the cranks stay very loose. I want to buy some inexpensive cranks that will last longer than the Lascos and the Doteks seem like a good choice.
Will the Doteks fit on a suzue hub?
Will they stand up to 3ft drops with a 130-150 pound rider? (I hope that they will last some time even after I grow more)
Trials and ordinary aluminum cranks don't go together. The bicycle Euro steel ones are better if you are on a tight budget. I've used tried both Lasco and Dotek and while the Doteks are a little better (what wouldn't be?) they are not for trials at all.
If you like the 140 mm (5.5 inch) length you could try the 'Schwinn steel cranks' (http://www.unicycle.com/shopping/shopexd.asp?id=173). They'll be stronger and hold up better than any of the aluminum 140 mm cranks. I've been using the 140 mm Schwinn cranks on my Coker with a widened Suzue hub. The Schwinn cranks fit just fine on a Suzue hub.
I used lascos a while ago and they bent after 10mins of use. the best square cranks I have used are euros. they lasted longer than a set of Black Widows I had.
It would be cool if you could by euros by the piece, insted of shelling out $25 for a set every time one bends.