Originally Posted by
wroomwroomoops
As the previous poster said, yes, you can use that freewheel with a 1/8" chain. As for your second question: I have actually used both freewheels. The ACS Claws has a good reputation, and sure enough, I have not managed to ride it into the grave, and have now deposited it back into the spares box, still in near-perfect condition. That said, I am still using the Shimano freewheel, and it seems less sturdy, but while I have opened the Claws, I have not done so with the Shimano, and can't be sure. The thing is, the Shimano runs much smother than the ACS, something about the Shimano pawls seems to have been done very right, and overall I must say I consider it the better freewheel. Note that the Shimano has now thousands of kilometers on - it has been in longer use than the ACS. Still works impeccably.
However, if you need 19, 20 or 22 teeth, or any number @ 1/8", you have a better chance to find it in the ACS offering. ACS just takes the freewheel business more seriously than the rest.
I had an ACS start slipping on me, with only about 30 miles on it. From what I've been seeing, They're rapidly gaining a reputation for being junk. The problem seems to be that the factory in India isn't putting enough oil in them, or something. (kind of ironic, considering the state of the packaging mine came in) I'd only recommend the Claws, if you have a lock ring tool, so you can open the freewheel up, and get some light oil into it, before you ride it. A little bit of oil seemed to solve the slipping problem in mine, which got me by until the better freewheel I ordered came in. It also seemed to quiet it down, a bit.
I'd suggest biting the bullet, and paying the extra for a White Industries freewheel. I balked at the price, when I first saw it, and bought an ACS. Three days later, I ordered the White. It's well worth its price. It's got a sealed bearing, and it's the only freewheel I've ever seen that runs concentric. (no more tight spots!) It engages as quickly as the ACS, which was one of the few things I like about my Claws freewheel.