24" twin-top tube cruiser w/ fork - Build thread !  RSS Feed

#1 2012-10-15 7:18pm

Brad4130
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24" twin-top tube cruiser w/ fork - Build thread !

I'm building a 24" twin top tube freedtyle cruiser for the SF bike expo on Nov 10-13 at the Cow Palace in San Francisco .
Wile I'll have a bunch of other bikes I've built for my company this is a full documentation of a old school freestyle inspired frame build .

Today I started by laying out the custom bent / tapered twin toptubes in the JIG figuring out the best frame geo for this build . The overall team for this frame design will be part General RL with hints from a Ozone method 1 . 
Along the way I mitered up the downtube to fit .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/0E299A99-AE40-4932-94E9-F8AF4F5AF3F2-2836-00000203C6D0147C.jpg

I'm also building a fork for this bike useing these components .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/CCFA055F-3EA2-4C23-BCDF-3150E3351CA8-2611-000001F1B69E897B.jpg

Stay tuned more to come , please post up your thoughts .
Thanks for looking !


Looking for : 48 spoke TNT hubs !!!

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#2 2012-10-15 7:32pm

DjYady
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From: Kansas City, KS.
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

I'm a sucker for twin top tubes and just started looking at 24's.... subscribed!


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#3 2012-10-15 7:34pm

rocs8x9x
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From: Appleton, WI
Registered: 2008-08-19
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

cool


PAIN IS TEMPORARY, LOSING IS FOREVER
[img]http://i380.photobucket.com/albums/oo245/rocs8x9x/topper_art-1.jpg[/img]

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#4 2012-10-15 8:09pm

skillsthebarber
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From: Sacramento, CA 95833
Registered: 2011-05-08
Posts: 369

Re: 24" twin-top tube cruiser w/ fork - Build thread !

this thing is going to be sweet. what color do you have in mind?

subscribed


Wanted: 13/16 laid back seat post

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#5 2012-10-15 8:14pm

Brad4130
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

skillsthebarber wrote:

this thing is going to be sweet. what color do you have in mind?

subscribed

I was thinking black / chrome parts
I'm going to do something cool on the frame , just don't want to say anything yet wink


Looking for : 48 spoke TNT hubs !!!

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#6 2012-10-15 8:36pm

skillsthebarber
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From: Sacramento, CA 95833
Registered: 2011-05-08
Posts: 369

Re: 24" twin-top tube cruiser w/ fork - Build thread !

If you need help designing decals for your project just let me know. I have a local place that can print on clear with white too. Im always looking for a fun project to keep my skills sharp.


Wanted: 13/16 laid back seat post

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#7 2012-10-18 2:50pm

Brad4130
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

I've been making small advances on this frame over the past 2 days .
I apologize for the lack of updates , I was at the shop pretty late last night .

So first off the BB shell was welded to the seat tube .
Always the first step on my frames .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/B8E7083B-466A-48BB-ABAF-3B0D16CA7779-468-00000047778773D1.jpg
http://i623.photobucket.com/albums/tt312/nemesis-Brad/3945F4EB-DE67-4E8C-9D94-493B6B45FFBC-468-000000475BCCF04F.jpg

I also machined a small insert for the seattube to help support the seatpost .
The tube I used for the ST is a double butted tube cut in half in the center of the thin section .
This gives you a thicker section at the bottom near the BB and tapered internally to the thinner top.
The insert extends about 2in into the thin section to create a upper butted section .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/BFDBD32E-6384-4AC6-84E0-2CF66D7B6C98-468-000000476D147EAE.jpg


Looking for : 48 spoke TNT hubs !!!

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#8 2012-10-18 3:24pm

Brad4130
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Next up was the mitering and final file hand fitting of the downtube into the frame and layout of the twins !
http://i623.photobucket.com/albums/tt312/nemesis-Brad/5E3F25E9-44A6-487E-9FD3-023DA14CA053-1324-0000013BA76ECFF7.jpg

After laying out the shape of the frame and tweaking my geo a bit so the seattube sat in the exact location I wanted in relation to the bends of the twins . This is when a frame can go from fugly to sexy with small tweaks !http://i623.photobucket.com/albums/tt312/nemesis-Brad/6A06F271-3DC8-40C0-B2AE-F2DD8FB46DA9-1324-0000013B070538E7.jpg

So now it was time to fit the each toptube in the mill vise and match miter each one . Yes this was the hard way to do the work but when your making one custom and not a thousand production bikes you kinda have to do it this way to figure out the design .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/61B98DA8-1999-4FA4-B4FB-D711C61F0BC7-1324-000001393DBC6DAC.jpg

After measuring twice , then double checking my setup it was time to start cutting the twins !
http://i623.photobucket.com/albums/tt312/nemesis-Brad/C69462B0-FADB-41F1-BDD0-4EBDE8C2F6BD-1324-0000013935B5C535.jpg

Now it was time to set the toptubes into the frame to check miter fit and overall look of the frame .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/82824802-D513-4841-BB48-EE05B121661C-1324-0000012D61A198D6.jpg
http://i623.photobucket.com/albums/tt312/nemesis-Brad/255C0E2D-E119-4564-BE2F-A1EBC5A3E64F-1324-0000012D523CBE84.jpg

I'm pretty happy on how this frame is coming out .

Next up, I  start fitting the chainstay's in the chain stay subassembly jig .


Looking for : 48 spoke TNT hubs !!!

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#9 2012-10-18 3:26pm

Burning River
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Looks amazing so far . cool


When I leave , come together like buttcheeks . - Grits N' Gravy

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#10 2012-10-18 3:45pm

mattbloke
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Registered: 2011-12-08
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

This thread is full of WIN! cool


Grown man on a Kid's bike ... i should really know better!

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#11 2012-10-18 4:19pm

dirkBMX
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From: Chicago, IL
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Awesome fit-up!! Great job!

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#12 2012-10-18 4:22pm

Brad4130
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

I got the top tubes cut and matched perfectly .
Oh I'm starting to get excited , this bike looks like a giant Ozone !!
http://i623.photobucket.com/albums/tt312/nemesis-Brad/3F86DE40-57DF-4751-955B-71CFDF807EE3-1750-00000150379F5850.jpg


Looking for : 48 spoke TNT hubs !!!

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#13 2012-10-18 5:57pm

rocs8x9x
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From: Appleton, WI
Registered: 2008-08-19
Posts: 1036
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

This could be best thread of the year!!! cool


PAIN IS TEMPORARY, LOSING IS FOREVER
[img]http://i380.photobucket.com/albums/oo245/rocs8x9x/topper_art-1.jpg[/img]

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#14 2012-10-18 6:04pm

Hot Shot
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From: Borneo, East Malaysia
Registered: 2006-05-22
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Cool project cool I hope someone builds a twin top tubes bmx one day .


ARE YOU HOT ?

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#15 2012-10-18 6:10pm

Brad4130
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Thank you for all the comPliments on the profess so far , I'm glad I could contribute to the forum big_smile

Here's a few shots of the chainstay's in the subassembly jig .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/6FAA2408-E3C2-4096-9646-27C4C161FB0E-1985-0000016EC4D93E7C.jpg
This is basically a piece of tooling plate with machined blocks set to the required spec's of what ever style bike your planning on building .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/EB043B4D-3DD7-4F49-9C76-17F36D264F0B-1985-0000016ECDD1148C.jpg
http://i623.photobucket.com/albums/tt312/nemesis-Brad/E7D83A70-B76B-4762-963A-3BA7E36A4111-1985-0000016ED6CE7E50.jpg
Right now I have it set for 110 rear Bmx spacing with Clarence for a 2.25 tire .
( more on parts later , I really scored a sweet set of treads for this baby ! )
The jig holds everything flat and allows you to keep the stays fixtures in the plate for mitering ,The chainstay tubes I'm useing are 3/4" tapered to 1/2" .
Oh the funky aluminum block is there to hold the spreader in flat .


Looking for : 48 spoke TNT hubs !!!

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#16 2012-10-18 6:16pm

jbrown1168
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Yes! Fabrication. Subscribing.


It's all for sale. Chrome frames suck. Real men rock reflectors.

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#17 2012-10-18 6:24pm

GAry
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Looking awesome, and love all the details.
Keep the good pics coming..sure you cant make another one of these?
Would really like an Ozone (inspired) 24 for the bmxmuseum


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#18 2012-10-18 6:32pm

kegger
Pro Memberbarbarian by blood, pirate by choice
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

sweet big_smile


A WISE MAN ONCE SAID.........   NOTHING...


HE LET HER VENT, THEN THEY WENT UPSTAIRS AND HAD SEX


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#19 2012-10-18 6:58pm

tomandemmy
Pro Memberbmxchatter
From: Spring Hill, TN
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

hey my brother is building me a phase 1 replica. nice thread here is the progress.

https://dl.dropbox.com/u/2640343/Photo09162120.jpg

Last edited by tomandemmy (2012-10-18 6:58pm)


NOS old school goose items.

MONGOOSE 24" PRO CLASS III WHEEL

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#20 2012-10-18 7:10pm

Brad4130
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

GAry wrote:

Looking awesome, and love all the details.
Keep the good pics coming..sure you cant make another one of these?
Would really like an Ozone (inspired) 24 for the bmxmuseum

Thanks Gary big_smile

That's a huge compliment coming from the curator of the museum .
Yes I'm sure I could be persuaded to build another , or part with this one for the right price wink

Here's a lil teaser on what's coming up tomorrow .
I have all these pieces on my desk , I believe with the right work they will come together into one of the coolest pieces I have ever built .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/5122F649-0B20-44B0-9EBC-0F3387C7B44A-1985-000001759B327A73.jpg


Looking for : 48 spoke TNT hubs !!!

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#21 2012-10-18 7:36pm

dedmann
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

are going to throw a radical gusset under the down tube at the head tube?
looks bitchn!


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#22 2012-10-18 8:00pm

TuRBo Todd
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

very cool to see.


If it's got two wheels, jump it.

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#23 2012-10-18 11:06pm

Hot Shot
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From: Borneo, East Malaysia
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Hot Shot wrote:

Cool project cool I hope someone builds a twin top tubes bmx one day .

Sorry typing error ^ Was actually trying to say that hopping someone would build a 22" twin top tubes bike one day .


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#24 2012-10-19 1:02am

RL
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Awesome Brad! cool


Wanted; '86 Zeronine Pro XL F&F. (With 'Z' stamped headtube gusset.)

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#25 2012-10-20 12:54am

Brad4130
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Re: 24" twin-top tube cruiser w/ fork - Build thread !

Mr. Headtube aproves of this thread !
http://i623.photobucket.com/albums/tt312/nemesis-Brad/60A1DF82-4657-4271-B4FD-A894E787712C-479-00000031D5B937D0.jpg

I polished the rear dropouts to a mirror finish .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/7328B8DE-784E-4410-A95F-FCA1DA40F693-479-00000031DBAB8732.jpg

Then it was onto cutting the radius for the BB in the chainstay subassembly .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/B984019C-DF8A-40C4-99E1-1ED5A004683E-479-0000003B0CE1256D.jpg

Once the radius cut was made the chainstay's were fit to the frame and dropouts .
http://i623.photobucket.com/albums/tt312/nemesis-Brad/B31BA703-B23C-4658-9A14-A77C645FBF27-479-00000031E1403023.jpg
http://i623.photobucket.com/albums/tt312/nemesis-Brad/BDE6AF64-2E31-4F60-9237-815E840EF5FB-479-00000031ECBEE22E.jpg
http://i623.photobucket.com/albums/tt312/nemesis-Brad/C54D8A8F-1ECF-43BA-AF43-F2DAC765222C-479-0000003B1966A825.jpg

Now it's time to stick this thing together , let's weld !!
http://i623.photobucket.com/albums/tt312/nemesis-Brad/FABFD2B6-102C-4281-A9E4-238806D33755-479-00000031F1D8A090.jpg
http://i623.photobucket.com/albums/tt312/nemesis-Brad/449A6F54-A03B-4CA0-A541-14D2DF9BBEBA-479-00000031E70D29B8.jpg
http://i623.photobucket.com/albums/tt312/nemesis-Brad/20FA724E-2AF8-4F27-9CC9-557CABE8B167-479-00000031FC654FD1.jpg


Looking for : 48 spoke TNT hubs !!!

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