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I turned my MTB into a single speed. The chain line is 100% straight but if I pedal super hard, the chain slips and makes a popping sound.
Something's not right but I can't figure out what.
>front and rear cog are brand new, 16T and 32T
>chain is a bit old
>tensioner is perfectly aligned
>chain length should be optimal
The weird thing is that with a longer chain and my old derailleur in place of the tensioner worked perfectly with no chain slippage.