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Vintage Bridgestone Road Bike 7 Speed (Made in Tokyo, Japan)

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Vintage Bridgestone Road Bike 7 Speed (Made in Tokyo, Japan)

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Old 12-05-18, 07:29 PM
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truthteller
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Vintage Bridgestone Road Bike 10 Speed (Made in Tokyo, Japan)

Does anyone have an idea the exact date of mfg of this bike?

This is without a doubt the smoothest bike i've ever rode, better than giant, bianchi, trek, specialized, jamis and so on...

Last edited by truthteller; 12-08-18 at 09:11 PM. Reason: Wrong number
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Old 12-06-18, 06:59 AM
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Welcome to the forums.In my experience, Bridgestone bicycles like yours (i.e. having the "Guaranteed World's Finest Precision Bicycle Mechanism" decal and fork reflectors) tend to be circa 1972. However, the serial number should tell us the exact manufacturing date.
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Old 12-06-18, 08:47 PM
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7 speed bicycle in 1972? Hmmm.

"Bridgestone Bicycles Tokyo, Japan". I have seen this label on Bridgestone models Altair, Antares LDT, Regulus, Spica, and Triathlon.
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Old 12-07-18, 06:27 AM
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Originally Posted by Hummer View Post
7 speed bicycle in 1972? Hmmm.

"Bridgestone Bicycles Tokyo, Japan". I have seen this label on Bridgestone models Altair, Antares LDT, Regulus, Spica, and Triathlon.
To get 7 speeds, the OP is adding the number of freewheel cogs and chainrings, instead of multiplying them. It's a boom era 10 speed.
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Old 12-07-18, 07:54 AM
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Originally Posted by truthteller View Post
Does anyone have an idea the exact date of mfg of this bike?
.
Does it have detailed, cast lugs and a "TECHNART" sticker on the upper seat tube?

Here's mine (slightly modified):






Not exactly a lightweight, but you're right; it rides smooth as buttah.
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Old 12-07-18, 07:55 AM
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Originally Posted by T-Mar View Post
To get 7 speeds, the OP is adding the number of freewheel cogs and chainrings, instead of multiplying them. It's a boom era 10 speed.

Nice catch!

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Old 12-07-18, 08:36 AM
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Originally Posted by DQRider View Post
Does it have detailed, cast lugs and a "TECHNART" sticker on the upper seat tube?

Here's mine (slightly modified):






Not exactly a lightweight, but you're right; it rides smooth as buttah.
excellent!
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Old 12-07-18, 09:10 AM
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Truly Original

Originally Posted by DQRider View Post
Nice catch!
Everything Original.

Absolutely No Modifications...
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Old 12-07-18, 09:12 AM
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Yes

O
Originally Posted by DQRider View Post
Nice catch!
Yes, Has Lugs, Original stickers
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Old 12-07-18, 09:15 AM
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Math 101

Originally Posted by Hummer View Post
7 speed bicycle in 1972? Hmmm.

"Bridgestone Bicycles Tokyo, Japan". I have seen this label on Bridgestone models Altair, Antares LDT, Regulus, Spica, and Triathlon.
2+5=7 class...
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Old 12-07-18, 09:21 AM
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Ser #

Originally Posted by T-Mar View Post
Welcome to the forums.In my experience, Bridgestone bicycles like yours (i.e. having the "Guaranteed World's Finest Precision Bicycle Mechanism" decal and fork reflectors) tend to be circa 1972. However, the serial number should tell us the exact manufacturing date.
Your Right!
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Old 12-07-18, 10:39 AM
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Originally Posted by truthteller View Post
2+5=7 class...
To calculate all the possible gear combinations, multiply the choices up front by the choices out back.
2x5=10. Or to put it another way, (1x5) + (1x5)=10.

Last edited by Hudson308; 12-07-18 at 01:34 PM.
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Old 12-07-18, 11:13 AM
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The O)P's bicycle is pre-Technart, which is the name Bridgestone used in the late 1970s. Prior to that, they were called Diecast Frames, though the technology was the same (i.e, aluminum lugs diecast around plugged and flared tubes). The OP's bicycle has the distinctive diecast lugs and BB shell, though the head lugs don't have the faux windows of some later Technart versions.

Based on the serial number, the OP's frame was manufactured in February 1974, a couple of years later than my original estimate. Bridgestone's model names tended to be the same as the Kabuki models which they manufactured for the USA market, in which case the OP's bicycle would be a Super Speed model.

Selective photo assist...






Last edited by T-Mar; 12-07-18 at 11:25 AM. Reason: added text
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Old 12-07-18, 04:01 PM
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Here Learn something...

Originally Posted by Hummer View Post
7 speed bicycle in 1972? Hmmm.

"Bridgestone Bicycles Tokyo, Japan". I have seen this label on Bridgestone models Altair, Antares LDT, Regulus, Spica, and Triathlon.
Go to below site:
bicycleuniverse.info/use-bicycle-gears/
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Old 12-08-18, 07:28 AM
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Originally Posted by truthteller View Post
Go to below site:
bicycleuniverse.info/use-bicycle-gears/
Originally Posted by bicycleuniverse.info/use-bicycle-gears/
You can think of gears as the same thing as speeds – a bike with 18 gears is an 18-speed bike. Bikes generally have 1, 3, 18, 21, 24, or 27 speeds. (10- and 15-speeds are obsolete and you don’t see them on new bikes any more.)
Wow! Those are fighting words in the C&V universe!

Truthteller, welcome to C&V and thank you for posting about your Bridgestone. However, not all bike related websites are equal, especially when it comes to vintage and older bicycles. When someone posts a statement like the above, "10- and 15-speeds are obsolete..." is no different than saying a three speed manual transmission in a '71 Volkswagen Bug is obsolete. If the vehicle still runs and is road-worthy, it is not obsolete.

The fact that you still ride and enjoy your 1974 Bridgestone, with it's 10 speed (5X2) transmission, proves it is not obsolete. Plus, there are thousands of members here that are thrilled that you still ride your old Bridgestone! Keep it rolling!
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Old 12-08-18, 07:22 PM
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Originally Posted by T-Mar View Post
To get 7 speeds, the OP is adding the number of freewheel cogs and chainrings, instead of multiplying them. It's a boom era 10 speed.
Well, that was so obvious from the pictures in the original post. I don't know how I missed it.
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Old 12-09-18, 08:07 AM
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Originally Posted by truthteller View Post
Your Right!
And “your” [sic] rude!

Did you understand the response re: the number of gear ratios you actually have, or did you just presume that you were correct when you wrote that (the line about Math 101, 5+2 is 7, class)?
People were eagerly assisting you, and the arrogant attitude back was less than cool.
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Old 12-09-18, 10:18 AM
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Way, way back on occasion a customer of the shop wanted to know how to "learn the gears".

It could get to be a treacherous conversation. Some understood that the extreme cross chain positions were not terrific for wear and that frequently the ratios were nearly or exactly duplicated elsewhere. Then some got upset that they wanted a TEN speed, not an 8 or distinctly 7 speed as measured on the gear chart.


Some of the early American Eagle then Nishiki brand bikes took a slightly different route, as they used Suntour mechanisms and with a long cage that could shift a 14-32 or even a 34 well, those bikes arrived with fairly small teeth variations of the chainrings, the "half step" scheme. Some got it, others did not really want to learn how to manipulate BOTH levers.


This goes along with the teasing trick of setting one of the considered bikes to purchase in a slightly smaller gear, almost always That bike was the preferred one. "it is easier to pedal". We would let them in on the secret, they would test ride again and almost always were then thinking about other things like handling, or... "I like this one, but it does not have comfort brake levers..." We can take care of that...

"Comfort" brake levers and different saddle, kickstand additions made a low profit margin bike sale more tolerable for the shop.

The French bikes almost always scored on handling, the Japanese on features or ease of shifting.

Last edited by repechage; 12-09-18 at 10:21 AM.
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Old 12-09-18, 04:02 PM
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Originally Posted by truthteller View Post
2+5=7 class...
7x1 = 7

I see that you are new to this forum.

Here is some education for you. There are freewheels and cassettes with 7 gears, also known as 7-speeds. These did not exist in 1972. That is what I was wondering about in my post, how can a 1972 bicycle have a 7 speed freewheel.

Next time you start a thread you may want to consider including pictures for everyone to see. It will be less confusing to BF readers. Yes, I know, you need to have ten posts before you can include images.
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