I removed my front chainring (42) and the 53 and need to replace the chainrings. This bike is used in the early spring due to the weather. I would like to know if anyone has any info on where I could purchase new chainrings and hopefully the spacing will be the same. I would like to make the inner a 39 tooth since the bike is an old ALAN frame with a 6 sprocket freewheel. I also have to buy a new derailler pulley wheel, chain, and some cables. Any recommendations on purchases is greatly appreciated.