Will it work? I've cast about and I think it could, but I don't have a definite answer. I've never been steered wrong here so please indulge me again.
I have a Shimano 2300 Rear Derailleur, a single 44T front ring, and a Shimano Hyperglide 8-speed cassette with 7 cogs 11-28, with 8-speed downtube shifter. I want to use 8 cogs up to 30T or 32T.
I found a RD 2300 spec sheet which says:
Total capacity 35 teeth or less
Largest sprocket 26T
Smallest sprocket 11T
Front chainwheel tooth difference 22T
Total capacity I take to mean the number of teeth difference between large-large and small-small so I'm way under that, and with just one ring the last one is irrelevant (right?). But what about "largest sprocket"? It's working fine as is with a 28T sprocket. Can that be stretched to 30? 32?