More on Rigida HLC 2000 rims

I was flipping through my 1987 Bicycling Buyer's Guide issue again last night (yes, I flip through these old mags quite often all to bring you, valued blog reader, interesting tidbits of information.) and I ran across this advertisement for the 1987 Schwinn Circuit.
The '87 Circuit was (is) a pretty sweet bike. Black Columbus SL (three main tubes presumably) frame with chrome (re: bling bling) stays, Suntour Sprint 9000 Accushift group, Dia Compe Royal Compe brakes, black anodized rims. Nice. It was dressed very similarly to my '87 Allez SE, but I'd have to say my Allez was one up on the Circuit mainly because it sports anodized chainrings that I think are the cat's pajamas. But I digress.
If you remember in a previous post, I was musing on the origins of the Rigida HLC2000 rims that came on my '88 Circuit. Well, I haven't found any 'new' information, but I may have solved the mysterious origins of the rims. The '87 Circuit ad above advertises "Hard Anodized Rigid (sic) HLC 2000 aero dynamic rim". This is odd, considering the specs in the 87 Buyer's Guide and also the catalog page provided by the good folks at trfindley.com both spec Araya rims. I guess this proves two things: 1) Schwinn did indeed OEM Rigida HLC2000 rims, at least for the 1987 Circuit, and 2) Schwinn, like every other bike maker, doesn't always follow catalog spec to the letter.
I would guess that the advertisement for the 1987 Circuit, spec'ing the Rigida rims went to press first. Perhaps Rigida had supply problems getting the rims to Schwinn and they modified their catalog to spec Araya rims instead. Later, the Rigida HLC2000's probably finally made their way down to Greenville, and stuck with a surplus of rims, they stuck the remaining Rigidas on a few of the earliest '88 Circuits that came off the production line. That, of course, is just pure speculation. The date code stamped on the head badge of my Circuit, "0338", indicates that it was built in the early part of 1988 (33rd day of year ending in '8', or Feb 2, 1988), which would seem to lend a shred of credence to that theory.
Anyone want to chime in on what kind of rims they've found on their Circuits and the date codes on the badges?

1988 Schwinn Circuit Project - Part II - Initial Impressions

Here's some thoughts as I was tearing down the bike and inspecting the frame.

1) The Circuit appears to be original except for the seat, brake pads, bar tape and wheel skewers (wheel skewers? WTF happened to the original wheel skewers??). An interesting item of note is the Rigida HLC2000 rims laced to Sante hubs. The Schwinn catalogs at http://www.trfindley.com/pg_schwinn_cats.htm indicate OEM rims were Wolber Tx Profil. Makes sense, back in those days every other OEM rim was Wolber. I don't recall a whole lot of bikes being spec'ed with Rigida rims. Of course, I've also found mfr. spec sheets are like lane striping in Asian countries - just a suggestion and not the rule. Take for example, my 1987 Allez. The catalog and spec sheelts say (guess what?) Wolber Alpine rims, but mine came with Saturae. I've seen a handful of examples since that have the Alpines on them, just as I've also seen examples of the Circuit with the Tx Profils. My guess would be manufacturers using up old stock or supply/quality problems from the OEM that cause these deviations from the intended specs. I looked through a few spec sheets from the 1987 Schwinn catalogs and there were a few models spec'ed with Rigida rims, although not the HLC2000 model - (want to bet some of 'em came out of the Schwinn factory with Wolber instead? :) So I would guess Rigida maybe sent Schwinn a wrong batch of rims and to save on some costs, Schwinn just used up the overstock Rigidas on a few Circuits they pumped out. Anyone care to comment on Rigida rims and specifically the HLC2000's? I have absolutely zero information on these other than they look as ugly as any other 20 year old rim with the anodization worn off in patches on the braking surface.

2) Tange Aero tubing. The Columbus seat tube decal "Tretubi" indicates 3 main tubes of Columbus SL/SP. The rest, including the fork, I assume are this mysterious Tange Aero tubing. I can't find any information on it other than the odd "Aero-style" bike (Panasonic) made with this tubing and some references to BMX frame/forks. I wonder if this was the same deal as OEM parts - namely Schwinn had some of this extra stuff lying around and to offset the cost of using Columbus main tubes used up the old stock of Tange Aero that would otherwise be collecting dust and spider eggs in a corner of the warehouse. Bikes did experience a huge price jump in 1988. Comparable models in my 1987 and 1988 buyer guide mags jumped as much as $200 from one year to the next. My '87 Allez was $599 MSRP that year. That same price in '88 would've got you a model one step down, the 105-equipped Sirrus, give or take 50 bones.

3) This bike is a paradox. The frame has a well above-average number of nicks, scratches, chips in the paint as well as a smattering of rust on the chrome forks and some serious buildup on the rear brake bridge. And oh man, the grease! Heinous gunky grease embedded in the paint everywhere. I'd give it a 5/10 for cosmetic condition. However, the components, aside from cosmetics, appear to be in excellent shape. BB and headset cups are pit-free and smooth. Hubs and pedals don't have any obvious binding or pitting in the races. Cassette cogs don't show any wear nor do the chainrings. I'd say 8/10 for the bike mechanically or as about as good as I've seen in a bike this age. Perhaps the previous owner(s) rode the bike for a season or two and put it away in a garage to collect shopwear scars. Kind of a shame, it's turning into a beautiful bike with a little TLC.