Hi Jerry, all
Unearthed this req for info which you posted (and I missed) at the end of '09. As I'm *finally* working on my build using a real beater version of this crankset, and can share some esoteric info I've dug up over the past few years...
- there seem to have been two versions produced of middle-ring diameters: 130mm and 110mm. You might notice on your crank, as on mine, that the forging for the outer chainwheel has artifacts of where they must have plugged the mold? I.e.: even though mine is drilled for 130, I can clearly see marks for 5 positions at the 110 size.
- 85mm inner bcd is also ostensibly the granny size of Tevano triples. Mark Bulgier passed one of these to somebody on-list for a mere song just recently... hope you're using it! :-)
- and, seeing as mine came unto me sans granny (read:anyone else with an idle Tevano granny???)... "To hell with this wacky forged outer chainwheel anyhow!," thought I as I cleverly substituted a set of TA triple rings I have. Discovered then that the 5-pins securing the outer to arm are a proprietary keyed design- much like a seatpost binder bolt, for example- and the chainwheel also bears notches to receive these keys. Hence, you can't just use the five Shimano bolts/washers/nuts with other 5-pin rings (keys interfere with tightening)...
- the bearings for the touring pedals (as other DynaDrive?) may be rebuilt (allegedly) using standard bottom bracket-sized balls - although there might also have been a special Shimano wrench required for pedal maintenance? I will be investigating this soon, as my set are quite crunchy.
- Bob Hanson shared a wonderful illustration of the Deore touring group:
http://www.flickr.com/
Best =- Joe Bunik Walnut Creek, CA
On 11/20/09, Jerome & Elizabeth Moos <jerrymoos@sbcglobal.net> wrote:
> I'm considering the original Deore for an upcoming build. Here are the
> Deore cranks in a 1982 catalog:
>
> http://www.sheldonbrown.com/
>
> The crankarms are compatible with TA Cyclotourist outer rings, but the Deore
> rings were 5-hole, not 6-hole like Cyclotourist. Outer ring could be
> drilled for only one inner ring (double) or two (triple). But there were
> also LD and MD outer rings. The catalog does not give the BCD of any of the
> rings, only the range of teeth for each. From this it looks like the LD
> double probably had a 130 BCD inner, compatible with DuraAce rings.
> Sutherland's in two Editions I have says the triple inner was 85 mm, only 1
> mm different from Stronglight model 99. Did they really make it 1 mm
> different from one of the most widely available touring cranks?
>
> But the MD version is a mystery. The inner ring on the MD double and the
> middle ring on the MD triple had a range of 34-37 and 34-35T respectively.
> One thinks these must have been the same BCD, but what? Did they use the
> common 110 BCD or the Campy triple inner 100 BCD or the Avocet/Ofmega triple
> inner 102 BCD? Anyone have any original Deore MD rings for trade or sale?
> Or any original Deore rings for that matter?
>
> Regards,
>
> Jerry Moos
> Bog Spring, Texas, USA