LZ’s Tech FAQ: Technical FAQ: Chain hops and grinding cogs – Dear Lennard, I have a SRAM GX 1X MTB setup with a 32t chainring and a big 42t in the back. Everything’s fine when I’m pedaling in the 42t cog, but when I backpedal, the chain drops a few gears down. This doesn’t happen when I’m in any other gear. Everything seems to be very smooth! I fiddled with the b-screw to get more space between the pulley and the 42t, but that doesn’t appear to do much. I’ve seen th… http://ow.ly/pY0650iH0lH