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02-18-2012, 12:41 PM
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#1
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Join Date: Feb 2012
Posts: 15
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what type of metal used for frame/fork
I was wanting to know if anyone knows what type of metal is used for a Because fork and a Union Street Bikes molly maguire frame? I am assuming the frame is chromoly but I dont know. any help is appreciated.
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02-18-2012, 02:05 PM
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#2
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yeah, im in a gang.
Join Date: Jan 2010
austin, texas
Posts: 3,693
Liked 254 Times on 207 Posts
Likes Given: 241
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i wouldnt buy anything if it wasnt krupp steel, just keep that in mind.
__________________
"We only like people from Old Zealand, sorry" alexzero13
Quote:
Originally Posted by yyrtjp
2%4 D*"#uD A*e , P*kr*4)(k, LA , h-~20
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02-18-2012, 06:44 PM
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#3
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i go fast
Join Date: Aug 2011
Des Moines Iowa
Posts: 402
Liked 11 Times on 11 Posts
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triple butted heat treated after welding 4130 japanese chromoly. oh wait thats on good polish made bikes
heres the link to the bike
http://www.njdirt.com/07/reviews/usbmolly.php
edit: at 6lbs frame weight, i wouldnt buy it. you can get a ns capital 2 for probably the same price but lighter. and the good tubing as previously stated by me
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02-20-2012, 07:12 PM
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#4
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Join Date: Sep 2005
Posts: 261
Liked 2 Times on 2 Posts
Likes Given: 2
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Quote:
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and the good tubing as previously stated by me
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Haha yeah you right, True Temper supertherm is crap. USB not only uses tubes made in the usa but they also build their bikes hear in small batches.
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02-20-2012, 08:49 PM
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#5
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i go fast
Join Date: Aug 2011
Des Moines Iowa
Posts: 402
Liked 11 Times on 11 Posts
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Quote:
Originally Posted by unipa
Haha yeah you right, True Temper supertherm is crap. USB not only uses tubes made in the usa but they also build their bikes hear in small batches.
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i was talking about the japanese chromoly. ive showed that frame hell with the 26/24 plus suspension. boosting out of bowls, coming up short on doubles, flyin down captain jacks on pike peak and its still taking it. i never trusted anything that had the word "super" in the name
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02-20-2012, 09:18 PM
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#6
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yeah, im in a gang.
Join Date: Jan 2010
austin, texas
Posts: 3,693
Liked 254 Times on 207 Posts
Likes Given: 241
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not even marz super monsters?
__________________
"We only like people from Old Zealand, sorry" alexzero13
Quote:
Originally Posted by yyrtjp
2%4 D*"#uD A*e , P*kr*4)(k, LA , h-~20
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02-20-2012, 09:56 PM
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#7
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Join Date: Sep 2005
Posts: 261
Liked 2 Times on 2 Posts
Likes Given: 2
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I guess you cant use Google so ill do it for you. This is what some manufactures say about it.
Peyto:
SUPERTHERM ™ is made from a proprietary superthermophilic (heat-loving) alloy. With an industry-leading strength of 217 KSI. These tubes will take a thrashing and come back for more. This is the ultimate material for high strength and low weight so you can go higher, faster, longer.
brooklyn machine works:
True Temper "Supertherm" butted, air-hardening, tubing is used for the top and down tubes on the Gangsta'. These tubes are made in the U.S.A. and are used on almost all high end BMX frames these days.
FBM:
SuperTherm from True Temper is a proprietary superthermophillic (heat-loving) alloy, developed in partnership with the U.S. Steel Alliance. The composition of Chromium, Molybdenum, and Vanadium with an unprecedented 217 ksi ultimate tensile strength makes this alloy actually gain strength through a metallurgical transformation in the heat-affected zone as a result of welding or brazing. SuperTherm is highly temper-resistant, resulting in an 11% increase in fatigue life and a 20% increase in impact strength heat treated 4130. The increased mechanical properties of SuperTherm allow for incredibly strong, yet lightweight frame designs with that legendary feel of steel ride quality.
These tubes are also used by s&m, Superco, EWR, Fit, and black market.
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02-20-2012, 10:43 PM
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#8
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i go fast
Join Date: Aug 2011
Des Moines Iowa
Posts: 402
Liked 11 Times on 11 Posts
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Quote:
Originally Posted by treewizzard
not even marz super monsters?
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big foots were first and inverted.
Quote:
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I guess you cant use Google so ill do it for you. This is what some manufactures say about it.
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but what they end up doin is stretching the metal too much or getting too thin of wall to keep up with the weight weenies and end up snappin the frame in half or they get a thicker tube and becomes heavier then most frames. im a firm believer in 4130 chromoly when it comes to strength. its been around for long time and probably wont ever leave. and notice how the only black market frame that has a weight on it is the contraband which is cromo.
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02-20-2012, 11:28 PM
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#9
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Join Date: Sep 2005
Posts: 261
Liked 2 Times on 2 Posts
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Quote:
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im a firm believer in 4130 chromoly when it comes to strength.
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Thats cool because Supertherm is 4130 cromo. 
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02-20-2012, 11:41 PM
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#10
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Join Date: Sep 2005
Posts: 261
Liked 2 Times on 2 Posts
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This is what Doc from superco has to say when asked about his use of supertherm on their DH bike
Quote:
Were you ever tempted to use aluminium?
Somewhat for this bike, only because the semi perimeter front end of the frame has some complex tube junction and clearance issues. It would be easier to deal with this in aluminium where the complexities could be handled by CNC machined parts instead of tubes. But having worked with the Supertherm 4130 tubeset for a while now on our hardtails and other prototypes, I knew this material is ideal for DH use and could produce a lightweight super strong frame. This material has 3 to 5 times the tensile strength of aluminium and almost twice that of standard 4130, and a vastly superior fatigue life. It’s light weight with butted wall thicknesses and is air hardening which means the heated zone around the welds actually increases in strength after welding. I don’t think this frame could be any lighter in aluminium without risking long term structural integrity.
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http://dirt.mpora.com/news/exclusive-superco-dh-photos.html
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02-21-2012, 02:39 PM
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#11
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i go fast
Join Date: Aug 2011
Des Moines Iowa
Posts: 402
Liked 11 Times on 11 Posts
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that is the only area i was able to find that had it named supertherm 4130. everywhere else just calls it supertherm and the temper versus ht was the only thing that had the 4130 chromo within the description. my bad.
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02-22-2012, 01:13 AM
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#12
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Join Date: Sep 2005
Posts: 261
Liked 2 Times on 2 Posts
Likes Given: 2
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Quote:
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that is the only area i was able to find that had it named supertherm 4130. everywhere else just calls it supertherm and the temper versus ht was the only thing that had the 4130 chromo within the description. my bad.
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Yeah kinda a pet peeve. I hate when people spout shit, when in reality they have no idea. sorry bro
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02-22-2012, 01:34 AM
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#13
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Join Date: Sep 2003
Posts: 9,765
Liked 315 Times on 254 Posts
Likes Given: 1
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I would really enjoy a video of downhiller actually riding trials as it seems he has great advice for everything as well as an abundance of universal knowing-what's-bestness.
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02-22-2012, 04:41 AM
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#14
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GTA MUTHER FUCKER!
Join Date: Sep 2003
Shanghai
Posts: 1,209
Liked 2 Times on 2 Posts
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hes too busy giving advice to actually do anything of that sort
__________________
[SIGPIC][/SIGPIC]
BMF TRIALS
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02-22-2012, 05:59 AM
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#15
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Join Date: Feb 2012
Posts: 15
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In short, the frame is of chromoly decent. And all I found on the fork was one little word on the Because web sit, steel.
I guess I should of hit unipa up about this since I bought the bike from him, thanks for the info.
The only reason for the question was I am going to relocate the brake mounts on the fork to work with the 24" wheels. I don't have the welding material for chromoly but the steel I can do easy.
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02-23-2012, 03:15 PM
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#16
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Join Date: Oct 2004
gateway teh medfd
Posts: 104
Liked 1 Times on 1 Posts
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i'm no high school graduate, but i'm pretty sure you can weld chromoly and mild steel with a typical er70s tig wire.
good luck!
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02-23-2012, 04:00 PM
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#17
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Join Date: Dec 2010
Atlanta, GA
Posts: 575
Liked 26 Times on 25 Posts
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Quote:
Originally Posted by [BMF] Chris
hes too busy giving advice to actually do anything of that sort
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loooooooooooool 
__________________
Quote:
Originally Posted by Cypher Components
oh yeah I has the super fixie skills you need teh rachet technologies
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02-26-2012, 11:23 AM
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#18
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werkinit
Join Date: Sep 2003
State of denial
Posts: 2,464
Liked 88 Times on 80 Posts
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I found this highly informative.
__________________
We have normality. I repeat, we have normality. Anything you still can't cope with is therefore your own problem.
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02-26-2012, 11:31 AM
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#19
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werkinit
Join Date: Sep 2003
State of denial
Posts: 2,464
Liked 88 Times on 80 Posts
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__________________
We have normality. I repeat, we have normality. Anything you still can't cope with is therefore your own problem.
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02-26-2012, 05:25 PM
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#20
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Join Date: Feb 2012
Posts: 15
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Quote:
Originally Posted by werkinit
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Get off my thread with you crap.
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02-26-2012, 06:56 PM
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#21
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Moderate.
Join Date: Jan 2004
Melbourne, Vic
Posts: 1,302
Liked 260 Times on 225 Posts
Likes Given: 162
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The only metal I use for frames and forks is heavy.
__________________
Quote:
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Originally Posted by Boots
I footgorm.
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02-26-2012, 06:57 PM
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#22
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yeah, im in a gang.
Join Date: Jan 2010
austin, texas
Posts: 3,693
Liked 254 Times on 207 Posts
Likes Given: 241
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i prefer a nice black metal
like steel
__________________
"We only like people from Old Zealand, sorry" alexzero13
Quote:
Originally Posted by yyrtjp
2%4 D*"#uD A*e , P*kr*4)(k, LA , h-~20
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02-29-2012, 06:43 PM
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#23
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Join Date: Feb 2012
Posts: 15
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well here is the fork with the brake post moved and welded. I just used standard metal mig and steel wire to tack them in place then cleaned the welds up with a tig. I didn't have any steel tig rods so I just used a little wire out of the mig to fill in one spot. Just have to clean up the old welds, paint and mount brakes. probably not in that order. test ride first.
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02-29-2012, 06:47 PM
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#24
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i go fast
Join Date: Aug 2011
Des Moines Iowa
Posts: 402
Liked 11 Times on 11 Posts
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you sir are crazy. looks good.
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03-01-2012, 07:00 AM
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#25
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Two dollars... cash
Join Date: Jan 2010
FL
Posts: 2,370
Liked 159 Times on 128 Posts
Likes Given: 35
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Hardcore, cut them fuckers off and move em.
__________________
I'm a man of simple tastes.
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