I tried some ideas and unfortunately I still couldn't get my 44 tooth sprocket aligned. So I decided to go ahead and get the CNC 36 or 44 tooth one. But apparently they fit three different sized hubs. Since it's going on a 21 speed Trek mountain bike, what adapter size should I get(1.0 inch for freewheel hubs, 1.5 inch - Most Coaster Brake Hubs (CB-110 and HiStop), or the 1.8 inch adapter). Which size do mountain bikes use? It's an older bike more than 10 years old so I dont know what one to get. Was going to get the one off GASBIKE.NET. My hub is a bigger diameter on one side than the other if that helps Here's a pic...
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