what's so great about lugs?
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what's so great about lugs?
Hi,
I'm not trying to start a fight, I'm just curious. Other than looking sort of nice (though I think maybe I spend too much time looking at bike as it is) are they inherently better than welds? If so, why?
I'm not trying to start a fight, I'm just curious. Other than looking sort of nice (though I think maybe I spend too much time looking at bike as it is) are they inherently better than welds? If so, why?
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Its easier to replace damaged sections of frame if you have lugs.
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They're dead classy an harken back to a time of gentleman velocipedists in tweed with a pipe and baguettes slid underneath their brake cables.
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At the risk of being flamed...brazing lugs is easier than TIG welding. Imperfections of the miter can also be covered with a lug. With a TIG weld, what you see is what you get. So miters must be precise, and the welder must have extremely good eye hand coordination. Lugs also limit the geometries to that offered by the lug manufacturers. But hey, they look cool.
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I'm sure someone will argue the point, but my stance is that they are not inherently "better", whatever you take that to mean.
#7
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In the Old Days a frame with lugs was a sure sign that the frame was of a higher quality. I disagree with PDXjeff. Especially if you consider the work that goes into making the lugs. ATMO a lugged frame will require more skill than a TIG frame.
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I'd imagine that, using the same tubes, lugged frames would be slightly heavier than TIG-welded because the area around the lugs has some areas of double thickness.
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Well, LOOK claims that they can "fine tune" the ride characteristics of a frame by using lugs. I dunno if I believe that, but I love my LOOK.
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I much prefer a smooth fillet brazing over 99% of all lugs.
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#12
Aluminium Crusader :-)
I assume you're talking about steel?
This article is very biased (VERY pro lugged steel), but it's entertaining and has some good info
https://www.henryjames.com/faq.html
there's more info out there if you wanna Google
The diehards say that lugs are stronger (I tend to agree), but the main benefit is easier repairs
This article is very biased (VERY pro lugged steel), but it's entertaining and has some good info
https://www.henryjames.com/faq.html
there's more info out there if you wanna Google
The diehards say that lugs are stronger (I tend to agree), but the main benefit is easier repairs
#13
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A properly welded joint is very very strong. It's also very very boring to look at.
Tim
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At the risk of being flamed...brazing lugs is easier than TIG welding. Imperfections of the miter can also be covered with a lug. With a TIG weld, what you see is what you get. So miters must be precise, and the welder must have extremely good eye hand coordination. Lugs also limit the geometries to that offered by the lug manufacturers. But hey, they look cool.
Brazing lugs is actually far more time consuming than TIG welding, and every bit as much skill is required to make a strong joint.
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There's nothing "inherently" better about lugs. However, there are a handful of bicycle frames which just so happen to be lugged that are considered the absolute top of their class. Make of that what you will.
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Lugs look cool, strengthen the joint, stiffen the frame?, and look cool.
Have you ever soldered copper tubing together? That same process is done with lugged frames. Much harder to do well with the bike tubing, of course.
A downside with lugs is they determine the geometry of the frame by their angles. If you need/want something a bit different, you either have new lugs designed and cast($$$) or go another route.
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Making a kilometer blurry
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When you factor the task of TIG welding, you must also compare with what went into the development of the lugs - therein lies art as well.
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Even some top of the line carbon uses lugs.
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The Raleigh Techniums used steel lugs with aluminum tubing. I believe in the 70's the first "carbon" bikes had carbon tubing with steel lugs.
And the aluminum lugged, aluminum tubing frames date back to the 30's.
And the aluminum lugged, aluminum tubing frames date back to the 30's.
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At the risk of being flamed...brazing lugs is easier than TIG welding. Imperfections of the miter can also be covered with a lug. With a TIG weld, what you see is what you get. So miters must be precise, and the welder must have extremely good eye hand coordination. Lugs also limit the geometries to that offered by the lug manufacturers. But hey, they look cool.
K thx capt. obvious.