Shimano 600 6 to 7 Speed Conversion
#1
Junior Member
Thread Starter
Join Date: Sep 2021
Location: So Cal
Posts: 97
Bikes: 2023 S-Works Tarmac SL7 Dura-Ace Di2, 2022 Cervelo Caledonia-5 SRAM Rival etap AXS, 2019 Specialized Sirrus Elite Alloy, 1977 Schwinn Super LeTour 12.2, 85 Bianchi Limited Shimano New 600EX
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 25 Post(s)
Liked 50 Times
in
28 Posts
Shimano 600 6 to 7 Speed Conversion
I have a 1985 Bianchi Limited with a Shimano NEW 600EX groupset. It has friction shifters and a New 600EX 6-speed freehub, Shimano part #FH-6207-6. My freehub body has a cracked dustcover and my cassette skips on a couple cogs. I member is offering up for sale a Uniglide 600 Hubset, which includes a 7-speed cassette and freehub body (6400 series?). Seeing a good opportunity to upgrade to 7-speed while addressing the defective dustcover, I'm considering purchasing the set. Photos are included in the linked thread.
Would this 7-sp freehub body and cassette be a direct replacement for my 6-sp set? I searched Sheldon Brown's website and can't find a definitive answer.
Would this 7-sp freehub body and cassette be a direct replacement for my 6-sp set? I searched Sheldon Brown's website and can't find a definitive answer.
#2
Senior Member
Join Date: Apr 2011
Posts: 7,182
Mentioned: 43 Post(s)
Tagged: 0 Thread(s)
Quoted: 4475 Post(s)
Liked 1,620 Times
in
1,064 Posts
It should work just fine. However, chances are most standard hyperglide bodies will also work and then you won't ever have trouble replacing the cassette, since Uniglide cassettes are no longer made.. DA being the exception because it is not compatible with anything else.
To illustrate, I swapped the uniglide freehub body off an Ultegra hub for a hyperglide freehub body from a cheap Shimano MTB wheel made 15 years later. There was a difference in the dust shields, but not one that affectted function. I'm sure if I had used something like 400ex or RX100 it would have the same seal system because they're all road hubs. I also subbed an Ultegra 8 hyperglide body onto an Ultegra 7 uniglide hub.
To illustrate, I swapped the uniglide freehub body off an Ultegra hub for a hyperglide freehub body from a cheap Shimano MTB wheel made 15 years later. There was a difference in the dust shields, but not one that affectted function. I'm sure if I had used something like 400ex or RX100 it would have the same seal system because they're all road hubs. I also subbed an Ultegra 8 hyperglide body onto an Ultegra 7 uniglide hub.
Likes For Kontact:
#3
Junior Member
Thread Starter
Join Date: Sep 2021
Location: So Cal
Posts: 97
Bikes: 2023 S-Works Tarmac SL7 Dura-Ace Di2, 2022 Cervelo Caledonia-5 SRAM Rival etap AXS, 2019 Specialized Sirrus Elite Alloy, 1977 Schwinn Super LeTour 12.2, 85 Bianchi Limited Shimano New 600EX
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 25 Post(s)
Liked 50 Times
in
28 Posts
It should work just fine. However, chances are most standard hyperglide bodies will also work and then you won't ever have trouble replacing the cassette, since Uniglide cassettes are no longer made.. DA being the exception because it is not compatible with anything else.
To illustrate, I swapped the uniglide freehub body off an Ultegra hub for a hyperglide freehub body from a cheap Shimano MTB wheel made 15 years later. There was a difference in the dust shields, but not one that affectted function. I'm sure if I had used something like 400ex or RX100 it would have the same seal system because they're all road hubs. I also subbed an Ultegra 8 hyperglide body onto an Ultegra 7 uniglide hub.
To illustrate, I swapped the uniglide freehub body off an Ultegra hub for a hyperglide freehub body from a cheap Shimano MTB wheel made 15 years later. There was a difference in the dust shields, but not one that affectted function. I'm sure if I had used something like 400ex or RX100 it would have the same seal system because they're all road hubs. I also subbed an Ultegra 8 hyperglide body onto an Ultegra 7 uniglide hub.
#4
Senior Member
Join Date: Jun 2014
Location: Ontario, Canada
Posts: 4,624
Bikes: iele Latina, Miele Suprema, Miele Uno LS, Miele Miele Beta, MMTB, Bianchi Model Unknown, Fiori Venezia, Fiori Napoli, VeloSport Adamas AX
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1324 Post(s)
Liked 927 Times
in
640 Posts
Regarding the cogs that the chain skips on. A GREAT thing about Uniglide cogs (except the smallest threaded one) is that they can be flipped to extend their life. Take off the cogs but remember which ones are causing the chain to skip. Reverse those cogs and reinstall all the cogs. You should be good to go as far as chain skip is concerned.
Cheers
Cheers
Likes For Miele Man:
#5
Junior Member
Thread Starter
Join Date: Sep 2021
Location: So Cal
Posts: 97
Bikes: 2023 S-Works Tarmac SL7 Dura-Ace Di2, 2022 Cervelo Caledonia-5 SRAM Rival etap AXS, 2019 Specialized Sirrus Elite Alloy, 1977 Schwinn Super LeTour 12.2, 85 Bianchi Limited Shimano New 600EX
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 25 Post(s)
Liked 50 Times
in
28 Posts
Regarding the cogs that the chain skips on. A GREAT thing about Uniglide cogs (except the smallest threaded one) is that they can be flipped to extend their life. Take off the cogs but remember which ones are causing the chain to skip. Reverse those cogs and reinstall all the cogs. You should be good to go as far as chain skip is concerned.
Cheers
Cheers
Thank you!
Last edited by Bici Veloce; 01-10-23 at 05:29 PM.