Facebook Twitter LinkedIn Pinterest Bluesky Threads The top pulley isn’t spinning like the bottom one. Is that supposed to happen? This is an old shimano 105 that I’m cleaning up. Is it supposed to spin like that? byu/True_Nose7757 inbikewrench by True_Nose7757 Bicycling Bike Bike Repair Biking Cycling Repair
msgr_flaught on April 22, 2026 2:54 am Those pulleys look barely worn. The top pulley is supposed to have some play by design so the chain can move laterally a bit. Looks fine to me.
2 Comments
Replace that wonky bit. In fact, do both while you are at it.
Those pulleys look barely worn. The top pulley is supposed to have some play by design so the chain can move laterally a bit. Looks fine to me.