Join Date: Apr 2005
Location: Northfield, MN
Bikes: 1997, stumpjumper S-works hardtail, Medici, Giant allegre (track dropouts and fixed gear), Columbia twosome, schwinn twinn, '67 raleigh 5 speed internal hub, Old triumph 3 speed, old BSA 3-speed, schwinn Racer 2spd kickback, Broken raysport criteriu
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I believe it means that they are compatable with Shimano's IG and HG systems (hyper glide, interactive glide) and that they are sized (width wise) for 6 or 7 gear cassettes. 8,9., & 10 speed cassettes require skinnier chains to cram in those extra cogs.
I think it will work for you. these chains are designed to make use of the ramp system on the HG/IG systems. Does your Miyata have ramps on the cassette cogs? It will work whether there are ramps or not, but it will work better if there are shifting ramps.
The real issue is how worn is your old cassette. A new chain on an old cassette will often not work, because the cogs have worn and will fit only a chain which is stretche. It is always recomended to change the chain and cassette simultaneously, so they wear together.