Thanks! I rode it the other night for the first time and it's amazing. I forgot how much I loved riding fixed gear. I'm not sure what the great inches would be -- I just kept the 52t chainring on the front (removed the smaller one) and put a 14t cog on back since I found myself using the 14t cog most often when I still had the 5spd freewheel on the bike. That's how she goes in flat, flat Florida.