Koga Miyata RidgeRunner (1987) - rebuild/restoration

[Jourian]

Hi there,

A few months back I got my hands on a Koga Miyata RidgeRunner dating from 1987. The seller told me; the bike was his wife's, however she never used the bike. Her boss gave it to her years ago as a gift. That's pretty much all he could tell me about the bike.

Bike as in catalogue: https://d2zxu9tg022395.cloudfront.net/files/8/0/4/Koga_Brochure_1987.pdf

The bike was collected as in the pictures below. The bike was collecting dust for a while and came with two flat tires. The condition is used; some paint damage here and there, hardend suede Vetta saddle and some slight surface rust on the seatpost. However, the bike appears to be in pretty much original condition; M730 groupset (rear derraileur excepted) , Nitto stem and bars and ARAYA RM20 rims.

I am planning to rebuild/restore the bike and record the progress in this thread.

 

[RetroDavy]

That's superb

 

[Dr Dremel]

Strange that the RD is Deore? But it´s a perfect base for a resto.

 

[RetroBikeCollecter]

Wow! Just wow! Ill await the resto

 

[Jourian]

Strange that the RD is Deore? But it´s a perfect base for a resto.

Yep it is a Deore. A thousand reasons a former owner has replace the XT one .

 

[Jourian]

A first update:
The bike is completely stripped and no major major damages, other than the usual on a used bike, were found.
Below I have posted some more detailed pictures of the frame (still in 'as collected' condition).
After checking the parts with the original parts list I have concluded that only the RD and tires are non-original.
Luckily I have some spare M730 RD's, but the original National Ibex tires will be much harder to obtain.

The upcoming days I'll clean up the parts nicely and share some of the results.

 

[Jourian]

First parts are cleaned.
The brakes came out quite nice.
Also the front wheel came out nice and shiny (not polished yet).

 

[Jourian]

Today I finished the RidgeRunner and realized I completely forgot to give updates on the proces.
For now 'll show the final result and try again when working on another bike .

I am quite happy with the result!
The bike is, to my knowledge, in original condition as in 1987 (except for the tires).

Full spec list will follow soon...

 

[RetroDavy]

Great Bike. Great pictures.

 

[Jourian]

Koga Miyata RidgeRunner (1987) spec list as built:

Frame: Hardlite FM-1: chromoly; triple butted, spline reinforced (23"/58cm)
Fork: Hardlite FM-1: chromoly, microfusion crown

Headset: Tange G-master, sealed
Stem: Nitto MT-5; 110mm
Handlebar: Nitto B811; 610mm
Grips: Suntour grips longsize

Brakes: New Deore XT (M730 series)
Brake Pads: New Deore XT (M730 series)
Brake Cables: Shimano
Cantilever cable hangers: Shimano
Brake Levers: New Deore XT (M730 series)

Shifters: New Deore XT (M730 series)
Front Derailleur: New Deore XT (M730 series)
Rear Derailleur: New Deore XT (M730 series)
Derailleur Cables: Shimano
Cassette: New Deore XT, 6 speed 14-16-19-22-26-30t (M730 series)
Chain: Shimano 600 EX UG
Cranks: New Deore XT (M730 series) 175mm
Crank Bolts: Shimano
Chainrings: Biopace 48-38-28t;
Chainring bolts: Shimano
Bottom Bracket: New Deore XT (M730 series)
Pedals: New Deore XT (M730 series)

Hub Skewers: Shimano (M730 series)
Rims: Araya RM-20; 36h
Hubs: New Deore XT (M730 series)
Spokes: Hoshi 14G
Tyres: Tioga WonderDawg 1.95

Saddle: Vetta MTB Anatomical
Seatpost: SR-CRE 101
Seatpost Binder: Sansin