I just picked this up today (craigslist) for what I think is a good deal. Is it what I think it is? Looks like a 1983 Team Miyata frame set thats been repainted a metallic blue.

I also am wondering about the Dyna Drive and how it works exactly. Does this accept the standard 68mm BB? I would like to build this frame back up and ride it. I have already checked out the "Miyata Catalogs".

Serial # on the bottom reads J895022 with a 63DD underneath.

Whats weird is it has a Specialized headset with no ball bearing and one piece of a campy BB********************?

Any help or info would be great in getting this baby back up and close to stock. Thanks.

The marking on the top of the seat stay pretty much makes it a slam dunk as a Team Miyata.

+1 Or its equivilent, the Koga Miyata FullPro.

DD means the geometry is Dyna Drive pedal specific. When you measure the ST you will notice it is not really 63, but a couple centimeters lower. The length of the bike is like with a conventional 63cm frame. With the DD pedal your feet are positioned ca 1.5cm below the axle, positioning you lower on the bike and giving a stable pedal feel.

Yes, the frame takes a 68mm English bb

Stock would be Dura Ace EX or Super Record if you decide to go for a Team SL. See here for detailed specs >> https://www.miyatacatalogs.com/2007/1...alog-1984.html

+1. Team Miyata, but it's a 1982 model. Correct build is Dura-Ace EX with the Dyna-Drive crankset and pedals.

Dyna -Drive is actually a reference to the pedals. On typical pedals, the top of the cage is above the axis of the pedal spindle, which causes an unstable platform. Dyna-Drive lowers the top of the cage, so that it coincides with the axle's axis, proving a stable platform. Reportedly, the cyclist expends energy trying to maintain stability in a normal pedal, while the Dyna-Drive's inherently stability allows the rider to divert this energy towards forward motion.

The downside is that the axle can no longer run beneath the whole width of the pedal to bear the load. The axle and bearings must be located entirely inboard of the cage. To accomplish this and avoid widening the spacing between pedals (Q-factor) Shimano employed an oversize (1") axle that allowed the bearings to located within the plane of the crankarm. The crankarm itself had no innovations other than the 1" x 24TPI oversize hole, though it was one of the stiffest cranksets availble during the era.

While I can't comment on the energy saving aspects, I can testify to the extreme stability of the pedals, having had them on a Dura-Ace AX group. Alexi Grewal regarded them highly and used them on his 1984 Olympic winning Pinarello, in spite of SunTour sponsorship.

Just curious. How can you tell it's an "82 as opposed to an "83? I couldn't see much difference in the two years. Is it in the serial number?

Thanks for the great explanation of the DD Elev12k and T-Mar.

I am assuming the 63DD stands for 63 seat tube length and dyna drive.

Anyone out there know where to get pre-made decals? So far I've found that it's a DIY thing.

T-Mar has a magic Ouija Board tuned to the frequency of dead Miyata frame builders.

and then he cross checks it with the Serial Number

Check eBay for decals, there's a few folks who have decent reproductions for a lot of models of various bikes.

Yes, the DD part in 63DD stands for that the frame is designed for use with DD pedals. From that perspective you also should only be building with DA EX (with DD pedals) if you want to go fully original.

A person I know was working on Koga-Miyata decals recently, so I have want to go the FullPro route I could drop him a line.

I heard Cyclomondo is also working on Miyata and Koga-Miyata decals currently >> https://stores.shop.ebay.com/Cyclomondo__W0QQ_armrsZ1