Rare Nasagawa NOS Shimano track bike, show bike, not ridden! Circa mid 70's

Availability: In stock (1)

Great Used condition! This bike is ready for immediate use. Just passed our multipoint inspection, everything is tuned up and ready to ride. Pictures are the actual bike you will get, not stock photos! Bike is in great Shape for a 70's track bike.It has never been ridden!   This was a Shimano Show bike We purchased it from a former Shimano employee that ran the Neutral service team for Shimano. This is the Ultra-ultra rare NOS Dura-Ace Pitch 10 track groupset, including special 36-hole, high-flange hubs and rear cog, BB and crank with dark anodized Pitch 10 chainring, and ultra rare 10mm pitch chain. Paint is excellent and no decals were ever used.   In 1973 Shimano decided to “reinvent the wheel” and dropped the universally accepted 1/2” pitch and replaced it with 10mm pitch. Their purpose was the 20% weight reduction due to the reduced size of the drivetrain. Their thinking was flawed as all other components remained full size and the weight reduction was minimal. This was further limited by a heavier-than-normal chain.  Never the less, Shimano had some success with a professional World Championship in Match Sprint in 1975 using this system. A prototype multi-gear Road system was built but not developed.


This is a Nasagawa Size 55cm: This bike is a fit for a rider that is 5'8" to 5'11" tall


Nisi Gold anno track rims with Dura Ace 36-hole, high-flange hubs and rear cog


Vittoria track sew-ups (original never used but probably need to be replaced)






 Dura Ace track group with 10 pitch rings and chain 


Dura Ace 170 (note the 10 on the crank!)






Cinelli Pista Steel


Cinelli 90-mm


Dura Ace Steel Headset

Weight as pictured:

16lb 12oz! as pictured

Our Measurements:

Seat Tube= 55 cm, Actual Top Tube= 55 cm, Head Tube= 160 mm, Stand over= 32.5 in, Seat Post size= 27.2 mm, Bottom Bracket= Dura Ace, Rear Spacing= 120

See the frame measurements below for details on how we measure.


We ship everywhere! If you are located in one of the countries listed here, we may be able to offer you lower shipping cost: Belgium, the Czech Republic, France, Greece, Hong Kong, Ireland, Italy, Netherlands, New Zealand, Norway, Spain, Sweden, Switzerland, or Vatican City. Thank you!

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