Insane Bicycle Mechanic
Join Date: Mar 2008
Location: other Vancouver
Mentioned: 1 Post(s)
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Uniglide (UG) chains never had seperate pins. Shimano introduced the replace-a-pin method method of breaking and reattaching chains a year after they introduced the Hyperglide (HG) cogs. Interactive Glide (IG) came later. IG and HG used the same pins, but there's different pins for 7/8-speed, 9-speed, and 10-speed chains.
To break a Uniglide chain, you push the pin almost all the way out but leave it hanging in the opposite plate. The chain should come apart. When you put it back on, you reattach it by pushing the pin back through. This takes practice and three hands- it's good to try it out on a workstand before you have to do it in the field.
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