Drivetrain Swap Question
05-27-22, 09:55 PM
#1
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Drivetrain Swap Question
I’ve got a 1983 Miyata 310 in pretty nice shape, equipped with Shimano Golden Arrow derailleurs and Dia-Compe brakes. I really like the aesthetic of the Shimano Tricolor components, and would like to use them on the Miyata. I’d like to keep the 5-speed cassette, or possible go to 6. Straight swap or in my ignorance am I missing something? What would I need to do to make it work? Thanks in advance.
05-27-22, 10:52 PM
#3
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It's likely a freewheel, not a cassette. Surprised your '83 is a 5-speed, but maybe it wasn't until '84 the model moved to 6. Personally, I'd go to 6 or even 7. Should be an easy swap to Tricolor.
05-28-22, 05:41 AM
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You need to check your OAL of the drop outs to see if they are 120 or 126, 6 speed was the jump unless you find a Suntour Ultra which can fit in a 120 OAL. Even so, you may have to space the hub with a swap, NDS to DS to get the clearance and change the dish of the wheel.
It not a big deal if you have some mechanical experience.
I have not run into a 5 speed cassette.
It not a big deal if you have some mechanical experience.
I have not run into a 5 speed cassette.
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05-28-22, 06:14 AM
#5
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Not an expert, but I think you will run into a few issues.
The shifters...you won't be able to index on the rear, but could run them with current friction shifters (but then you are mismatched). I don't think any tricolor shifters ever had a friction option? Also, not sure I ever saw a banded shifter for tricolor so you would need braze ons? Also an opportunity for brifters...
The bolts for the brakes...are your current Dia Compes bolt or recessed. All tri-color was recessed I think. Levers will be no problem.
The 5 speed freewheel cogs might be too thick for the chain that would be thinner for the 7 speed pulleys on the tri-color.
Honestly, an upgrade would be cool, but you might need a new rear wheel with a freehub, so you can source a 7 speed cassette. Then you get the full benefits of the excellent tri-color stuff.
https://www.ebay.com/itm/29499941711...QAAOSwxh5ijALY
If spacing is made 126, and the hub is friendly, maybe an Ultra 7 freewheel could be wriggled into indexing.
Like I said, I am certainly not an expert so more knowledgeable folks will chime in.
EDIT: Does the 310 have that top braze on mount for aero shifters?
The shifters...you won't be able to index on the rear, but could run them with current friction shifters (but then you are mismatched). I don't think any tricolor shifters ever had a friction option? Also, not sure I ever saw a banded shifter for tricolor so you would need braze ons? Also an opportunity for brifters...
The bolts for the brakes...are your current Dia Compes bolt or recessed. All tri-color was recessed I think. Levers will be no problem.
The 5 speed freewheel cogs might be too thick for the chain that would be thinner for the 7 speed pulleys on the tri-color.
Honestly, an upgrade would be cool, but you might need a new rear wheel with a freehub, so you can source a 7 speed cassette. Then you get the full benefits of the excellent tri-color stuff.
https://www.ebay.com/itm/29499941711...QAAOSwxh5ijALY
If spacing is made 126, and the hub is friendly, maybe an Ultra 7 freewheel could be wriggled into indexing.
Like I said, I am certainly not an expert so more knowledgeable folks will chime in.
EDIT: Does the 310 have that top braze on mount for aero shifters?
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Last edited by jdawginsc; 05-28-22 at 06:20 AM.
05-28-22, 08:10 AM
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I put Tri-color on my 1984 310 a couple years ago. I have since changed it back to the Golden Arrow components. I had to do some modification to the index shifters to allow them to be used on the aero-mounts. The aero-mounts have 4.5 mm threads instead of the more common 5 mm. I found an old pair of stem shifters that had the correct bolts. After removing the plastic wing nuts, I could tighten them with a nut driver. The wheels were already 126 mm uniglide 7 speed, so they slipped right in.
1984 Miyata 310, with SIS and Tri-color drivetrain.
SIS shifter on Shimano top mount base.
1984 Miyata 310, with SIS and Tri-color drivetrain.
SIS shifter on Shimano top mount base.
05-28-22, 08:22 AM
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Shimano did offer an aero mount for indexed shifters, both clamp and braze options.
If the bike has side-mounted braze-ons, Shimano's weird shifter bosses would have been used for Golden Arrow levers, so the odd-size bolts would be needed to secure index levers (using Shimano's chromed, concave mounting escutcheons).
If the bike has side-mounted braze-ons, Shimano's weird shifter bosses would have been used for Golden Arrow levers, so the odd-size bolts would be needed to secure index levers (using Shimano's chromed, concave mounting escutcheons).
05-28-22, 10:47 AM
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Where the hell did the name “Tri-color” come from? You mean Shimano 600EX?
05-28-22, 10:51 AM
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Shimano 600 ultegra had the stripe with the corporate colors...
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1987 Crest Cannondale, 1987 Basso Gap, 1992 Rossin Performance EL, 1990ish Van Tuyl, 1985 Trek 670, 1982 AD SLE, 2003 Pinarello Surprise, 1990ish MBK Atlantique, 1987 Peugeot Competition, 1987 Nishiki Tri-A, 1981 Faggin, 1996 Cannondale M500, 1984 Mercian, 1982 AD SuperLeicht, 1985 Massi (model unknown), 1988 Daccordi Griffe , 1989 Fauxsin MTB, 1981 Ciocc Mockba, 1992 Bianchi Giro, 1977 Colnago Super
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05-28-22, 11:05 AM
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Tri-color is almost as bad as “brifters.”
05-28-22, 05:50 PM
#11
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Lots of great thoughts here, appreciate everyone taking the time. I knew it was freewheel and not cassette, but it was late and I’m old and had been up 21 hours. Plus I don’t know from Shineola. Anyway, stumbled on some really nice NOS in-the-box 600 Arabesque today. Hmmm, this stuff would look great on the Miyata...
