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Fuji S12-S 650B

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Fuji S12-S 650B

Old 10-29-16, 03:08 PM
  #1  
nlerner
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Fuji S12-S 650B

A few years back, I obtained a Fuji S12-S frameset in a trade with @ScottRyder, the Fuji King of the North Shore. I really like it a lot: sport touring geometry, room for wide tires with 700c wheels, reasonably light weight, and very clean build. I rode it a fair amount, but it got somewhat left behind by other bikes in the fleet, then consigned to the winter trainer in the attic, and then, a couple of years ago, I sold it off in a purge. I did figure that these bikes are relatively common in the Boston area, and one in my size would surface again at some point. Well, a month or so ago, one did on CL, and I bought it--same color and size as my previous one (though with a few more scratches and spots of corrosion, particularly on the top tube at the brake cable guides). I also had a set of 650B wheels with 126mm rear hub around, pulled from a frameset that I sold off some time back, so I decided to match those with the S12-S, slap on some Weinmann 750 center pull brakes and see what happened. The results are good! I'm running the original crankset but with 48/36t rings, rather than a triple, SunTour Cyclone GT RD and the SunTour AR FD that it came to me with, SunTour barcons with original housing and cables, Grand Bois rims and V-O hubs, Panaracer/Pacenti 650b x 38mm tires, Nitto stem and Nitto Randonneur bars, early Tektro aero brake levers, original seat post, Brooks C.17 saddle. Total weight as shown is about 25 lbs.

Serial # is FI005983, which I think makes it a 1980? I'm not sure I'm interpreting that correctly.

A few pics below and a full album here.

IMG_0906

IMG_0907

IMG_0908

IMG_0911

IMG_0912

IMG_0913

IMG_0915

IMG_0920
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Old 10-29-16, 04:02 PM
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That came together very nicely. Not too heavy either.
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Old 10-29-16, 04:21 PM
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Very, very nice. I have a 1979 Trek 510 hanging in my garage. I picked it up with an eye towards doing a 650b conversion with it. This thread may motivate me!
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Old 10-29-16, 05:22 PM
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Really nice. I feel like maybe I will taste the 650b koolaid some day.
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Old 10-29-16, 07:01 PM
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Nice bike but those upward seat angles make me hurt just looking at them.
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Old 10-29-16, 07:29 PM
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devinfan
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Beautiful and tasteful job. Looks so much fun to ride! Seat position is a matter of personal taste -whatever works for you! I will say I used to ride with all my saddles angled just like yours until I realized I was riding with the seatpost raised too high. Angling the saddle back has the same effect as lowering the saddle slightly. Probably not the case with you but it was a revelation for me.
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Old 10-29-16, 07:40 PM
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nlerner
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Originally Posted by plonz View Post
Nice bike but those upward seat angles make me hurt just looking at them.
Yeah, I only did a short test ride today and plan to take it on a longer shakedown cruise tomorrow and will adjust the saddle accordingly. I have a C.17 on another bike and have it quite flat, so this one might end up that way, too.
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Old 10-29-16, 07:50 PM
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Looks exactly like the 1980 built one I have and am currently converting to 650b. Mine unfortunately was still built up as a 12 speed so I guess that would help date yours as a bit older. My S/N is : FK0000326



It's a total work in progress. Over the winter I'll swap out the drivetrain, saddle, and a few other pieces.
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Old 10-29-16, 08:03 PM
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Very nice. Please don't let Phil see this!
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Old 10-29-16, 08:21 PM
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nlerner
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Originally Posted by rccardr View Post
Very nice. Please don't let Phil see this!
Hah! Didn't Phil end up selling his?
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Old 10-30-16, 09:06 AM
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ramzilla
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Beautiful bike. You're probably right about the age. 12 speed began to appear around 1980. Chrome socks on the rear stays disappeared. Center pull brakes began to vanish around then too. But, I notice this one still has them. Nice threaded eyelets for fenders or racks on there. Very nice.
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Old 10-30-16, 10:06 AM
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What's going on with the drive-side dropout? In the picture of the derailleur (IMG 0913), it looks like it's really bent or something, just above the derailleur's cable loop.

Otherwise, a nice build!
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Old 10-30-16, 02:10 PM
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Originally Posted by DiegoFrogs View Post
What's going on with the drive-side dropout? In the picture of the derailleur (IMG 0913), it looks like it's really bent or something, just above the derailleur's cable loop.

Otherwise, a nice build!
Good catch! Yup, there's a weld blob above that dropout, so it was repaired at some point (though the paint is a perfect match). The dropout itself is aligned, so that's good.

Just came back from a 20-mile shakedown ride. Felt pretty good. I did level out the saddle a bit more, and cockpit fit overall was very good. Crankset creaked a bit under load so I need to check the crank bolts. It did feel a bit under-geared as I was in max gear a bit too much, so I'll likely swap in a 50t big ring.
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Old 10-30-16, 03:16 PM
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Nice conversion!

Fuji S12-S makes a great conversion candidate. Plenty of clearance in the chainstays, too.

My S12-2 LTD:
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Old 10-30-16, 04:21 PM
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nlerner
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^ Terrific! Looks like a great all-day rider.
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Old 05-07-17, 01:58 PM
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heres what i did with a very similar fuji royale.
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