I'm tired of buyin sprockets, i have two sprockets with a couple miles on them want to trade.12 tooth have a couple blocks on it......mint..... Want to trade for 13 tooth....have a 42 rear sprocket with couple miles........ Will trade for a 38 tooth....both fits scramblers,trailblazers etc....they must be in near new shape......will sell both if have to buy alternatives........$20 for both