Cranbrook Springer Forked BTR YD100 Replica Build (without fabrication)

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Tom from Rubicon

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Apr 4, 2016
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'And I appreciate the info. I think leverage will be the key for sure. The 1” tube I cut off is roughy .077” thick. I’m guessing I can find something comparable at Home Depot."
Not.
Curt and Steve can correct me, but bicycle tubing is generally 4130 chromoly. As in aircraft frame tubing.
Home Depot it ain't.
Steel – the different types of steel in bike frames – gravelcycling (wordpress.com)

Steve, gave you a good tip if you are unfamiliar with shaping steel tubing. Packing sand in the tubing and trapping it causes the out side of the bend to stretch while minimizing crush and collapse of the inner bend.
I don't know what your day job is. It takes a particular skill set to safely fabricate a bike frame. I Don't. (^)
Consider your Night Rider, every frame joint is lugged and brazed. The tubing is chromoly steel. Just trying to keep you from breaking your neck Danny, if the Sporty doesn't first.
Regards,
Tom
 

Nightster

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'And I appreciate the info. I think leverage will be the key for sure. The 1” tube I cut off is roughy .077” thick. I’m guessing I can find something comparable at Home Depot."
Not.
Curt and Steve can correct me, but bicycle tubing is generally 4130 chromoly. As in aircraft frame tubing.
Home Depot it ain't.
Steel – the different types of steel in bike frames – gravelcycling (wordpress.com)

Steve, gave you a good tip if you are unfamiliar with shaping steel tubing. Packing sand in the tubing and trapping it causes the out side of the bend to stretch while minimizing crush and collapse of the inner bend.
I don't know what your day job is. It takes a particular skill set to safely fabricate a bike frame. I Don't. (^)
Consider your Night Rider, every frame joint is lugged and brazed. The tubing is chromoly steel. Just trying to keep you from breaking your neck Danny, if the Sporty doesn't first.
Regards,
Tom
right the sportster is more of a worry, but point taken. Where can I find chromoly steel? There is a pipe place not far away, I will call them when I get a chance. Otherwise there’s a place about 45 minutes away I’m sure would probably have it.

thanks tom
 
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Tom from Rubicon

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Me? .083" Welding thin steel is a pain. Until you get your amps set right. Curt can counter me. My experience as a welder is quite limited. I repaired a lawn mower deck break with a flux core 110V.
At work using a gas shielded MIG is a total different cat. Practice a lot. blow outs in thin steel is common.
Tom
 
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Nightster

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Me? .083" Welding thin steel is a pain. Until you get your amps set right. Curt can counter me. My experience as a welder is quite limited. I repaired a lawn mower deck break with a flux core 110V.
At work using a gas shielded MIG is a total different cat. Practice a lot. blow outs in thin steel is common.
Tom
Yeah, I plan on doing some practicing with some extra that I buy.

thanks again
 
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Tom from Rubicon

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I yield to Curt again. google: Schwinn bike metallurgy specifications. good luck. Since Schwinn left Chicago.....
Now, all of the above being equal. 1018 DOM tubing.

Speedy Metals - Steel Round Tube
Choose your favorite wall thickness and OD.
I have used Speedy Metals for 30+ years. I have a local kinda center that I can drive to to save shipping.
Tom
 
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curtisfox

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Check this out.................Curt

 

Nightster

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Check this out.................Curt

Thanks man, following that for sure