Re: Rear sprocket for short track
I have steel and aluminum sprockets I often interchange with no issue, so you should be fine as long as you take care of the chain properly. Having a -1 in the front sprocket is equal to about +3 in the rear; so if you have a -1/+2, then it's about equal to having just a 50 tooth rear sprocket with a stock front sprocket. Also, if you have a 190/55 or 180/60 rear tire then you'll want to add one tooth to the rear since it has a larger diameter and affects your final drive as well. So for instance, a -1/+2 on a 180/55 and a -1/+3 on a 190/55 is roughly the same final drive ratio.
In case you're not familiar with this website,
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is a great tool to narrow down your options and select/compare gearing based on top speed of each gear.