I’ve been on the look out for a short reach, tall frame for awhile, so when this 63x57 popped up locally on CL, I grabbed it. There doesn’t seem to be a lot of information out there on these, so I figured I’d fill in what I could for anyone that comes across another. Koga has all of their catalogs back to 1976 on their website (
https://www.koga.com/en/service/broc...2000-1976).htm). They're basically useless for this era, containing neither geometry nor build details. Shop sticker says this one was originally sold by Furio Rad-Sport in Erlangen, Germany. My guess is that it was brought back by an American serviceman in the early 90s.
From what I can deduce, despite this being an a 1989 model, the frame is essentially a 1986 Miyata 1000, with the same triple butted splined tubing, which Koga called "FM-1". However there are several unique changes specced by Koga. So far I’ve found:
- Chromed fork and rear stays. The chrome on the rear stays goes up to at least the brake bosses. I can’t tell if the rest of the frame is chrome, though I lean towards not since the paint isn’t flaking off.
- Internal brake housing routing.
- 130mm spaced vertical dropouts
- Shifter boss on the seat tube for a 3rd shift lever used to engage and disengage a bottom bracket dynamo.
- Threaded bosses on under side of seat stays for a Dutch style ring lock.
While Miyata made the frames for Koga, the rest of the assembly occurred in the Netherlands. From the factory the build is mixture of 600 Ultegra and XT
- Ultegra 600 stem and seat post
- Ultegra 600 (aka tricolor) brake levers, down tube shifters, and bonus down tube shifter for the Dynamo
- XT BR-M732 cantilever brakes
- XT headset with the sturdiest cable stop I’ve ever seen.
- XT FC-M730 BioPace triple, 170mm. The crank rub on this one is extreme. Like, 2mm deep extreme.
- XT M732 derailleurs
- XT M730/M732 hubs laced to 36H Wolber M59 rims. (Mismatched wheels on this one)
- SR Road Champion bar with internal brake housing routing.
- Union bottom bracket dynamo (working!) with union headlight and fender mount tail light
- ESGE/SKS fenders with dynamo wire routing
- Koga/Miyata branded rear, front and low rider Jim Blackburn-esque racks. The front rack as an arm for mounting the headlight
- Maruichi Dural 7 kick stand (removed)
- A quite wide, but very firm, sprung saddle.
- Bell. Unbranded, but identical in every way to other universals I've seen
- Should have matching frame pump, but missing.
Unfortunately I’m on the road for awhile, so i won’t have time for the full tear-down/clean-up/rebuild for a month or so. I’ve attached a few shots in as-found condition, minus the headlight, which was unfortunately broken, and the kickstand. It didn't come with pedals so I stuck some random ones on it so I could ride around. I'm looking forward to rebuilding this one and taking it on some tours and long day rides.
Here you can see the internal cable routing along the top tube, as well as where the housing exits the bottom of the bars. All of these points are reinforced with stress relieving inserts.
The saddle is at a wacky angle, I'm going to swap it to my grocery getter. It has a profile very similar to a B-17.
Here's the original catalog page. It's in Dutch, but you can pretty much make out what it says, which isn't much.
