Dura ace DT shifters (7 speed) indexing with freewheels?
09-22-04, 02:59 AM
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Dura ace DT shifters (7 speed) indexing with freewheels?
I just bought some indexed 7 speed dura ace DT shifters. I know they will work with a 7 speed hyperglide cassette, but will they work with a 7 speed freewheel. How about a non-shimano 7 speed freewheel like those sunrace freewheels out there (new and cheap...good 13-28 ratio).
I'm using a new 9 speed shimano 105 rear derailler so I know I have to use the alternate cable routing to make it capatible (read sheldon brown's website).
I'm using a new 9 speed shimano 105 rear derailler so I know I have to use the alternate cable routing to make it capatible (read sheldon brown's website).
09-22-04, 06:55 AM
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A 7-speed Shimano freewheel has the same cog spacing as a 7-speed Shimano cassette. Sun-race freewheels are Shimano compatible. Suntour 7-speed freewheels don't have the exact same spacing, but are close enough that they usually work.
Do you have a Hyperglide freehub? If so, here's what I would do: get a 9-speed cassette and use just 8 of the 9 cogs. One quirk of the old Dura-ace shifters paired with a non-Dura-ace rear derailer or a Dura-ace 9-speed derailer (light action) is that you get the shifting of the next tighter spacing. The old Dura-ace shifters pull less cable per shift than the light action levers. So an 8-speed Dura-ace shifter paired with a light action rear derailer will shift 9-speed spacing. Since 7-speed spacing is sooo close to 8-speed, a 7-speed Dura-ace shifter paired with a light action rear derailer will also shift 9-speed spacing.
Do you have a Hyperglide freehub? If so, here's what I would do: get a 9-speed cassette and use just 8 of the 9 cogs. One quirk of the old Dura-ace shifters paired with a non-Dura-ace rear derailer or a Dura-ace 9-speed derailer (light action) is that you get the shifting of the next tighter spacing. The old Dura-ace shifters pull less cable per shift than the light action levers. So an 8-speed Dura-ace shifter paired with a light action rear derailer will shift 9-speed spacing. Since 7-speed spacing is sooo close to 8-speed, a 7-speed Dura-ace shifter paired with a light action rear derailer will also shift 9-speed spacing.
09-22-04, 11:18 AM
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That;s some good info.
If I route the cable through the light action derailleur the alternate method (see sheldon brown article on dura ace compatability) I should get the normal 7 speed shift spacing right?
If I route the cable through the light action derailleur the alternate method (see sheldon brown article on dura ace compatability) I should get the normal 7 speed shift spacing right?
