Both of my bikes have older Shimano chainsets that require middle chainrings with 104mm bolt centres (104BCD) and 90mm inner diameter (90ID). I have had no success at finding the cheaper Shimano Deore range of 32 tooth middle chainrings that have 90ID - all of the current range are now 88ID which would mean filing 1mm off the bolt flanges.
Anyone know with confidence whether there are still any entry level 104BCD 90ID Shimano middle chainrings?
I know there are some earlier Shimano XT ones available, and Middleburn also cover this size - but are somewhat expensive for what is my pub hack. The last XT I had didn't last a year, which is the reason I wanted to try a steel entry level Deore.
bj
Anyone know with confidence whether there are still any entry level 104BCD 90ID Shimano middle chainrings?
I know there are some earlier Shimano XT ones available, and Middleburn also cover this size - but are somewhat expensive for what is my pub hack. The last XT I had didn't last a year, which is the reason I wanted to try a steel entry level Deore.
bj
