I just recently had my Salsa Fargo converted to single speed by my LBS. They installed a 32T shimano 9 speed chainring up front and a Surly 18t 3/32 cog in back. Running a SRAM PC850 8 speed chain. From day one I experienced the occasional "pop!" in my chain only when cruising at top speed with very little torque on the pedals. No chain skipping even at high torque climbing hills..just the pop at low tension and high rpms. I blamed the KMC half link and replaced it with a Gusset Slink. Smoothed things up but still have the occasional "pop!". LBS was clueless. I messed with tension and chainline to no avail. Then it occurred to me maybe the 9 speed 32T chain ring is the issue! It is pinned and ramped and has the smaller teeth here and there to assist in shifting so at low torque and high rpm could it be "rolling" the 8 speed chain forward and popping when it re engages?? or is it trying to "shift" on me? the noise sounds like it's coming from the chain ring. Makes sense to me since at high torque the teeth would be fully engaged so that's why its not skipping on me. I told my theory to the LBS and they ordered a Surly SS ring pronto. Why they didn't in the first place p*sses me off. But am I right to think this is the issue or am I overlooking something? Thanks!
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Thread: chain pop noise on single speed
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