Originally Posted by
UniGeezer
I don't use them for anything extreme, like drops, but the 150/127mm dual hole cranks (polished 7050 aluminum) are rated for extreme use. But adding the 3rd hole so close to the 127mm hole would void that claim. They work just fine for hill climbing and long distance though. Since my 700c unicycle is fixed, I use the 150s for steep climbing, then switch to the 110s for the ride back down, flats and moderate hills.
Thanks for that...that clears that up..
in my limited experiences with tapping (or thread cutting) a tap is a tap, there is no real difference between cutting and cleaning. you just have to start with the correct size starter hole and then go slowly, get the tap started square, lot of oil, go forward, then back out, then forward a bit more, then back.....