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What lights can fit on an old Spécialités TA front rack?

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What lights can fit on an old Spécialités TA front rack?

Old 03-17-18, 10:33 AM
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What lights can fit on an old Spécialités TA front rack?

I have an old Spécialités TA “rack,” which is really a support for a large handlebar bag, on a Motobecane. These racks have a short stub for mounting a light, but the stub is only about a quarter inch in diameter. Are there any modern lights designed to fit on such a thin post? What about old lights?
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Old 03-17-18, 10:36 AM
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ready to fabricate custom solutions?
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Old 03-17-18, 12:02 PM
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Originally Posted by fietsbob View Post
ready to fabricate custom solutions?
Yep, if it comes to that!
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Old 03-17-18, 06:16 PM
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I did one, but I can't remember how. This is on my "zero bike", which resides at a friend's house in the People's Republic of Berkeley, so no way for me to check right now:



Maybe I threaded the rod and put an extension on it? It's probably 6mm, not 1/4", since it's french. Should be able to use an M6 die to thread it along with a female standoff.
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Old 03-17-18, 06:38 PM
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Originally Posted by gugie View Post
I did one, but I can't remember how. This is on my "zero bike", which resides at a friend's house in the People's Republic of Berkeley, so no way for me to check right now:

(Snip)

Maybe I threaded the rod and put an extension on it? It's probably 6mm, not 1/4", since it's french. Should be able to use an M6 die to thread it along with a female standoff.
With a closer look I see that the stub is threaded internally, probably for a 5M bolt. Interesting!

Thanks Gugie. I’d still love to know what the rack was designed to work with, but being able to put on a modern light would be nice too.
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Old 03-17-18, 08:01 PM
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Check the bolt size it could be 4.0, 4.4.5 or 5.0 but ounce you get the bolt size correct you should be able to mount bolt pretty much any standard light you just may need to buy a bolt for $1.00 or less at a better stacked local hardware store. Also Gugies light is mounted to a demi fender/light half way the fork mount which were very common on nicer 60's bikes I which they would have kept them nice spot to mount nearly anything you want..

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Old 03-17-18, 10:30 PM
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Originally Posted by gugie View Post
...Maybe I threaded the rod and put an extension on it? It's probably 6mm, not 1/4", since it's french. Should be able to use an M6 die to thread it along with a female standoff.
I believe I did the same thing. I threaded the stub just enough for two nylock nuts and the light. I threaded the inner nylock nut, added the light, then tightened both nuts. Probably a toothed washer in there... It was a good excuse to buy a cheep metric tap and die set. I think I tried 5mm, but it could have been 6mm.

I don’t have an updated closeup photo in my album, but you can see what I intended to do on my ‘79 Trek.
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Old 03-18-18, 07:53 AM
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Originally Posted by mountaindave View Post
I believe I did the same thing. I threaded the stub just enough for two nylock nuts and the light. I threaded the inner nylock nut, added the light, then tightened both nuts. Probably a toothed washer in there... It was a good excuse to buy a cheep metric tap and die set. I think I tried 5mm, but it could have been 6mm.

I don’t have an updated closeup photo in my album, but you can see what I intended to do on my ‘79 Trek.
Bingo! The light’s mount bolts to the side of the stub. I had been thinking the light had to clamp around the stud.

Now I know what I need to look for. Thanks everyone.
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Old 03-18-18, 08:20 AM
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This is mountaindave’s arrangement showing both his light and the rack’s plain wire stud:



And here is my stud, which is larger in diameter and has a hole in the middle. The pic is too fuzzy to see, but the hole is threaded.

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Old 03-18-18, 08:26 AM
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Thanks for the assist - can’t post photos from iOS...

You just need the correct bolt (and maybe a toothed washer) and Bob’s your uncle!
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Old 03-18-18, 08:37 AM
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Heh. I posted these photos from an iPad. :-) I had to fuss a bit to do it though!
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Old 03-18-18, 09:00 AM
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That information is worthy of its own thread.
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Old 03-18-18, 10:33 AM
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I'm still kind of curious if anyone has a picture of one of these racks with a vintage light mounted. It must have been something fairly common once. Perhaps a Soubitez front lamp would mount to it with some sort of stamped steel hardware?
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Old 03-18-18, 02:39 PM
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Aubergine-

TA racks came in 3 versions: without a light support wire, with an unthreaded L shaped wire for a clamp and with the threaded boss that you have at the end of the L shaped wire. I had an identical one and it held a Soubitez headlight securely. The Soubitezs came with a serrated washer crimped to the light housing mounting bracket and mounted right up securely to the TA boss. They aren't terrific for light pattern even with an LED replacement for the OEM halogen bulb. Some specifics here, if you need them.

I added a photo below showing the Soubitez mounting tab.


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Old 03-18-18, 02:59 PM
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Originally Posted by Salamandrine View Post
I'm still kind of curious if anyone has a picture of one of these racks with a vintage light mounted. It must have been something fairly common once. Perhaps a Soubitez front lamp would mount to it with some sort of stamped steel hardware?
You see the from time to time on eBay France with lights mounted in various fashion.
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Old 03-18-18, 04:09 PM
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Originally Posted by bertinjim View Post
Aubergine-

TA racks came in 3 versions: without a light support wire, with an unthreaded L shaped wire for a clamp and with the threaded boss that you have at the end of the L shaped wire. I had an identical one and it held a Soubitez headlight securely. The Soubitezs came with a serrated washer crimped to the light housing mounting bracket and mounted right up securely to the TA boss. They aren't terrific for light pattern even with an LED replacement for the OEM halogen bulb. Some specifics here, if you need them.
Thank you, Jim. I am not interested in old lights (or even modernized old lights), but I will see if I can find a nice battery-operated LED light I can bolt to the stub.
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Old 03-18-18, 08:11 PM
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Originally Posted by gugie View Post
You see the from time to time on eBay France with lights mounted in various fashion.
Thanks gugie.

I just spent 15 minutes on ebay France lusting over whatever came up by searching velo ancien. Crocodile fenders. I need those! Obscure cantilever brakes. Need those too, at least I think I do. Shoot. Thanks a lot...
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Old 03-18-18, 09:08 PM
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Originally Posted by Salamandrine View Post
Thanks gugie.

I just spent 15 minutes on ebay France lusting over whatever came up by searching velo ancien. Crocodile fenders. I need those! Obscure cantilever brakes. Need those too, at least I think I do. Shoot. Thanks a lot...
Damn, I had my eyes on both of those too...might need some collusion so we don't bid each up...

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Old 03-18-18, 09:48 PM
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Funny. I tore myself away before I did any bidding. May be tempted to peek at them tomorrow, not that I bothered looking at the end dates. I'd be happy if you bid on those and got them, to save me from the temptation. Croc fenders - too cool.
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Old 03-19-18, 10:56 AM
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Originally Posted by Salamandrine View Post


Funny. I tore myself away before I did any bidding. May be tempted to peek at them tomorrow, not that I bothered looking at the end dates. I'd be happy if you bid on those and got them, to save me from the temptation. Croc fenders - too cool.
Yeah, but at 180 Euros + shipping? Ouch!
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Old 03-19-18, 01:24 PM
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Ouch indeed. I somehow didn't notice the price. That's about 3 sets of Honjo fenders. Might be worth it for the right bike.
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Old 03-19-18, 05:08 PM
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Originally Posted by gugie View Post
Yeah, but at 180 Euros + shipping? Ouch!
Well, I've seen them for €180 + an aluminum rack but also for €70...

French eBay is dangerous. I just made a small mistake or three on there.
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Old 03-19-18, 05:29 PM
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Originally Posted by JaccoW View Post
Well, I've seen them for €180 + an aluminum rack but also for €70...

French eBay is dangerous. I just made a small mistake or three on there.
Damn you.

Affaires à suivre

Pro tip, if you're into garde-boue, have them shippped "sans tringles". The steel stays are heavy and take up room for shipping. VO has new aluminum stays and hardware for $8.
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