Hi, I am looking to get a higher-toothed single speed freewheel for my bike, and I'm wondering if there is a different brand that is compatible with Shimano. Currently I'm running a 17T freewheel, Shimano model SF-MX30. I'm assuming the chain is 3/32" as this is how these replacement freewheels are sold. This freewheel only seems to come in 16, 17, or 18T models, and I'm looking to go up to probably 19 or 20T. I've seen other brands that have this size, but I'm not sure if they are compatible. Anyone know if I can use these non-shimano brands?