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20" to 26" conversion. Mid School dyno build  RSS Feed

#51 2017-06-04 6:41pm

Minx20
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From: Delray Beach, FL
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Re: 20" to 26" conversion. Mid School dyno build

....just put longer cranks on it to adjust for the higher bb...problem solved.

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#52 2017-06-04 6:54pm

Jesse96ss
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Re: 20" to 26" conversion. Mid School dyno build

Just got the decals from ChristianHetheMurray.  Picked up a few odds and ends. The chainring is Gt but the disc is something I had, gave it a quick polish and tossed some decals on it. Not sure if this is going on this build yet. http://uploads.bmxmuseum.com/user-images/234558/img_26775934b9ba0e.jpg


Weather was kinda crappy this weekend so I didn't get to do any painting.


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#53 2017-06-04 7:11pm

raulluis
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Re: 20" to 26" conversion. Mid School dyno build

.

Last edited by raulluis (2017-06-04 7:13pm)


If you can't stand behind our troops,then,feel free to stand in front of them.

My 1990 GT Aggressor build !!!
http://bmxmuseum.com/forums/viewtopic.php?id=560014

2015 Mid School Build OFF
http://bmxmuseum.com/forums/viewtopic.php?id=602923

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#54 2017-06-04 7:12pm

raulluis
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Re: 20" to 26" conversion. Mid School dyno build

Crashman wrote:

cobra_standard wrote:

It's actually not nonsense the geometry/bb comment is a perfectly legitimate observation.  wink

The OP is an artist. My response was precautionary to other builders. The only trolling I saw came from raulluis smile

No, dont blame on me


If you can't stand behind our troops,then,feel free to stand in front of them.

My 1990 GT Aggressor build !!!
http://bmxmuseum.com/forums/viewtopic.php?id=560014

2015 Mid School Build OFF
http://bmxmuseum.com/forums/viewtopic.php?id=602923

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#55 2017-06-04 7:29pm

PunkRockCop
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From: Bolingbrook, IL
Registered: 2015-08-29
Posts: 120
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Re: 20" to 26" conversion. Mid School dyno build

I don't care how low or how high that bottom bracket sits, this thread is cool and that franken-Dyno is way cool.


Not sure what I'm looking for, but I'll know it when I see it.

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#56 2017-06-04 8:23pm

Crashman
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From: Mount Pleasant, MI
Registered: 2012-04-22
Posts: 4730
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Re: 20" to 26" conversion. Mid School dyno build

80sFreestyleFan wrote:

Look's cool lol So is it a high center of gravity or what? What's The big deal?

I guess it depends on the type of riding right? It should be an incredible rock crawler big_smile


Wanted: Inexpensive lot of cheap 7/8" bars for grandkid's bikes. I will paint as needed.

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#57 2017-06-05 11:28pm

80sFreestyleFan
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Re: 20" to 26" conversion. Mid School dyno build

Well that's a good Thing though. After thinking about it I guess it's where The weight (feet) is, not sure.

Looking good Jesse!


That chit will buff out

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#58 2017-06-17 11:29pm

BRICKOS2
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Re: 20" to 26" conversion. Mid School dyno build

Jesse96ss wrote:

BRICKOS2 wrote:

^^^ For us amateurs playing at home - pilot welds?

How much sleeve is used - this is just smaller diameter tubing inserted where it joins?

Yes, Each weld has a sleeve.

Top tube has a 4" sleeve
Bottom tube has a 6" sleeve
Seat mast has a 4" sleeve with a 2" extension
Upper chain stays have a 3" sleeve
Lower chain stays have a 4" sleeve
Forks have a 3" sleeve on each side

Each with a small gap so most of the weld is below the surface of the tubes. Then is passed over 3 times, with each weld half way over lapping the last.

You can see in this picture the seat mast extension. Nothing is welded yet. The sleeves are holding everything together

http://uploads.bmxmuseum.com/user-image … 09f8a3.jpg

Obviously the sleeves are a smaller diameter - are they sourced from the donor bike - ie seat tube inside of top tube - or are they sourced elsewhere according to the diameter required?

Chain / seat stays must be sourced elsewhere as there's nothing smaller on the donor bike.

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#59 2017-06-18 5:18am

Jesse96ss
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Re: 20" to 26" conversion. Mid School dyno build

BRICKOS2 wrote:

Jesse96ss wrote:

BRICKOS2 wrote:

^^^ For us amateurs playing at home - pilot welds?

How much sleeve is used - this is just smaller diameter tubing inserted where it joins?

Yes, Each weld has a sleeve.

Top tube has a 4" sleeve
Bottom tube has a 6" sleeve
Seat mast has a 4" sleeve with a 2" extension
Upper chain stays have a 3" sleeve
Lower chain stays have a 4" sleeve
Forks have a 3" sleeve on each side

Each with a small gap so most of the weld is below the surface of the tubes. Then is passed over 3 times, with each weld half way over lapping the last.

You can see in this picture the seat mast extension. Nothing is welded yet. The sleeves are holding everything together

http://uploads.bmxmuseum.com/user-image … 09f8a3.jpg

Obviously the sleeves are a smaller diameter - are they sourced from the donor bike - ie seat tube inside of top tube - or are they sourced elsewhere according to the diameter required?

Chain / seat stays must be sourced elsewhere as there's nothing smaller on the donor bike.

The lower chain stays are sleeved with peices from the upper chain stays.

Upper chain stays are sleeved with some stock I had left over from another project.

Seat mast is sleeved with a old seat post.

Down/top tube is sleeved with pieces from the down/top tube, cut then rolled to fit,welded then inserted.


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#60 2017-06-18 5:20am

Jesse96ss
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Re: 20" to 26" conversion. Mid School dyno build

I got some work done yesterday. Mostly smoothed out and a few coats of primer. A few spots I need to address but happy with the way it's going. http://uploads.bmxmuseum.com/user-images/234558/img_2775594670129a.jpg


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#61 2017-06-18 8:42am

Indyjps
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From: Chicago
Registered: 2016-09-07
Posts: 1958
Bikes: 19

Re: 20" to 26" conversion. Mid School dyno build

Jesse96ss wrote:

BRICKOS2 wrote:

Jesse96ss wrote:

Yes, Each weld has a sleeve.

Top tube has a 4" sleeve
Bottom tube has a 6" sleeve
Seat mast has a 4" sleeve with a 2" extension
Upper chain stays have a 3" sleeve
Lower chain stays have a 4" sleeve
Forks have a 3" sleeve on each side

Each with a small gap so most of the weld is below the surface of the tubes. Then is passed over 3 times, with each weld half way over lapping the last.

You can see in this picture the seat mast extension. Nothing is welded yet. The sleeves are holding everything together

http://uploads.bmxmuseum.com/user-image … 09f8a3.jpg

Obviously the sleeves are a smaller diameter - are they sourced from the donor bike - ie seat tube inside of top tube - or are they sourced elsewhere according to the diameter required?

Chain / seat stays must be sourced elsewhere as there's nothing smaller on the donor bike.

The lower chain stays are sleeved with peices from the upper chain stays.

Upper chain stays are sleeved with some stock I had left over from another project.

Seat mast is sleeved with a old seat post.

Down/top tube is sleeved with pieces from the down/top tube, cut then rolled to fit,welded then inserted.

Ive made sleeves from other tube correct size,  also out of donor bike tubes.  A third option Ive used the cut outs with a slit and rolled onto itself.  Sleeve a few inches into the tube and leave a weld gap,  the sleeve provides a weld backer too.   I prefer a solid sleeve but this works.  The integrity of the weld is most important.

Third option,  gotta creep up on the pinch so its a nice tight fit.
http://uploads.bmxmuseum.com/user-images/236303/20160911_14170559469ff716.jpg

This was on a chopped frame cruiser,  if anyone attempted BMX moves on it theyd be nuts.

Last edited by Indyjps (2017-06-18 8:47am)


Everything's a rider and most of its for sale or trade.

Location: Chicago Burbs

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#62 2017-06-18 9:01am

Indyjps
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From: Chicago
Registered: 2016-09-07
Posts: 1958
Bikes: 19

Re: 20" to 26" conversion. Mid School dyno build

Jesse96ss wrote:

I got some work done yesterday. Mostly smoothed out and a few coats of primer. A few spots I need to address but happy

Looking good,  joints are finished out nicely cant even see them.   White with the blue decals and some blue anno is gonna go a nice combo.


Everything's a rider and most of its for sale or trade.

Location: Chicago Burbs

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#63 2017-06-18 9:33am

Jesse96ss
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Re: 20" to 26" conversion. Mid School dyno build

Thanks man. I just finished up polishing the levers for it. http://uploads.bmxmuseum.com/user-images/234558/image5946ab52af.jpg


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#64 2017-06-18 11:38am

RandolphCarter
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Re: 20" to 26" conversion. Mid School dyno build

Looking good!


Labor creates all wealth.

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#65 2017-06-24 2:15pm

Jesse96ss
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Re: 20" to 26" conversion. Mid School dyno build

Small update.

I picked up a matching his and hers Dyno pier side mountain bikes.

Why you ask?? cool

For the cool tires of course! http://uploads.bmxmuseum.com/user-images/234558/img_2840594ed5b134.jpg
http://uploads.bmxmuseum.com/user-images/234558/img_2842594ed5b274.jpg
http://uploads.bmxmuseum.com/user-images/234558/img_2841594ed5b352.jpg
http://uploads.bmxmuseum.com/user-images/234558/img_2843594ed5b4ed.jpg

Got them cleaned up and mounted on the wheels. The tires are very soft and has some surface cracks in the white wall, but definitely will hold up for a while... plus I have spares.... if I can get my girlfriend off the purple one lol

Frame is in its final stage before paint. http://uploads.bmxmuseum.com/user-images/234558/img_2844594ed67539.jpg

Last edited by Jesse96ss (2017-06-24 2:16pm)


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#66 2017-06-24 2:17pm

Jesse96ss
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From: Tampa Florida
Registered: 2016-07-17
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Re: 20" to 26" conversion. Mid School dyno build

http://uploads.bmxmuseum.com/user-images/234558/img_2838594ed6f540.jpg
http://uploads.bmxmuseum.com/user-images/234558/img_2839594ed6f62a.jpg


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Screw J&R bmx “superstore”

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#67 2017-06-25 6:48pm

Wyatt'sWorld
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From: Parkville, MD
Registered: 2017-01-29
Posts: 787
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Re: 20" to 26" conversion. Mid School dyno build

Damn!!! That thing is looking SICK! Nice pickup on those tires, very cool

Can't wait to see it painted with decals, keep up the great work, looks amazing!


Jeff


Word to the wise, communication is key!

Personal will not deal with list.
Claydogg6969 -  unresponsive
79supergoose -  unresponsive

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#68 2017-06-25 8:25pm

Indyjps
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From: Chicago
Registered: 2016-09-07
Posts: 1958
Bikes: 19

Re: 20" to 26" conversion. Mid School dyno build

Movin right along.
Nice grab,  that blue one would be interesting as a single speed/ cruiser, strip off the unnecessary stuff,  add some MX bars.


Everything's a rider and most of its for sale or trade.

Location: Chicago Burbs

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#69 2018-03-03 2:39pm

Jesse96ss
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From: Tampa Florida
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Re: 20" to 26" conversion. Mid School dyno build

It’s been a while but I have started working on this again. All the parts are here and laid a few coats of paint today.

http://uploads.bmxmuseum.com/user-images/234558/aa901d9f-a3ff-4ef1-a148-d714364764545a9b242dda.jpeg
http://uploads.bmxmuseum.com/user-images/234558/22ccfcca-cdac-4ea5-a0df-a60295109f0f5a9b2432e8.jpeg


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#70 2018-03-03 7:53pm

The Fixer
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From: North Jersey
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Re: 20" to 26" conversion. Mid School dyno build

I dig this project man, looks cool! Wish I knew how to weld so I could build up something similar.


Reliving the '80s, one ride at a time.

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#71 2018-03-03 10:04pm

bnd
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From: Utah
Registered: 2010-12-13
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Re: 20" to 26" conversion. Mid School dyno build

Jesse96ss wrote:

roll here we go again....

Dude, we have read all your post. We all know you think I'm an idiot and I knew nothing about frame geometry...roll it's a BICYCLE!

I also have 2 mountain bike frames welded together. One on top of the other.. want to tell me that it's wrong to?

Please stop trolling my post...

Jeezus Christ, that's no shit. Looks like you have the conversion police on your ass. If you don't understand simple BB Geo on a bike, you have a lower I.Q. than my feedback rating. I'll never understand why people feel the need to jump into anothers thread and pick them apart when they are doing something super cool.

Jesse, your talented, creative & building something for your Dad, that's something special. Good on you bro.

b.


I want rustlers, cut throats, murderers, bounty hunters, desperados, mugs, pugs, thugs, nitwits, halfwits, dimwits, vipers, snipers, con men, Indian agents, Mexican bandits, muggers, buggerers, bushwhackers, hornswogglers, horse thieves, bull dykes, train robbers, bank robbers, ass-kickers, shit-kickers and Methodists.

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#72 2018-03-03 10:31pm

Kurt_Rad
Pro MemberBMX Museum Role Model
From: Cochrane, AB Canada
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Re: 20" to 26" conversion. Mid School dyno build

bnd wrote:

Jesse96ss wrote:

roll here we go again....

Dude, we have read all your post. We all know you think I'm an idiot and I knew nothing about frame geometry...roll it's a BICYCLE!

I also have 2 mountain bike frames welded together. One on top of the other.. want to tell me that it's wrong to?

Please stop trolling my post...

Jeezus Christ, that's no shit. Looks like you have the conversion police on your ass. If you don't understand simple BB Geo on a bike, you have a lower I.Q. than my feedback rating. I'll never understand why people feel the need to jump into anothers thread and pick them apart when they are doing something super cool.

Jesse, your talented, creative & building something for your Dad, that's something special. Good on you bro.

b.

This. Sadly some people rarely have anything positive to contribute


You're not paying hookers for the sex...you're paying them to leave.

[img]http://uploads.bmxmuseum.com/user-images/56126/img_053859d1cd019a.png[/img]

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#73 2018-03-03 10:40pm

GT_Junkie
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From: So Cal
Registered: 2014-11-19
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Re: 20" to 26" conversion. Mid School dyno build

Subscribed cool

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#74 2018-03-03 11:14pm

Crashman
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From: Mount Pleasant, MI
Registered: 2012-04-22
Posts: 4730
Bikes: 2

Re: 20" to 26" conversion. Mid School dyno build

Kurt_Rad wrote:

bnd wrote:

Jesse96ss wrote:

roll here we go again....

Dude, we have read all your post. We all know you think I'm an idiot and I knew nothing about frame geometry...roll it's a BICYCLE!

I also have 2 mountain bike frames welded together. One on top of the other.. want to tell me that it's wrong to?

Please stop trolling my post...

Jeezus Christ, that's no shit. Looks like you have the conversion police on your ass. If you don't understand simple BB Geo on a bike, you have a lower I.Q. than my feedback rating. I'll never understand why people feel the need to jump into anothers thread and pick them apart when they are doing something super cool.

Jesse, your talented, creative & building something for your Dad, that's something special. Good on you bro.

b.

This. Sadly some people rarely have anything positive to contribute

Like you? I mean, I'd like to think this was a place for people to get help, not to get screwed over with bad advice wink
That part of the thread was buried and then you brought it back just to lash out at the people who were in the "good advice" business. You'd think a BMX guy would be toughened up by this age.
I own a high bottom bracket conversion. I also own a pair of 990's (two sets) BTW. That's a voice of experiences you'd gladly pretend didn't exist.
I'll wait to see to threads: One guy who does something totally creative, rides the bike, and says "I can't believe I destroyed a working classic for something I can barely ride", and another guy who says "Thanks for pointing out that I'd need to drop my BB by 4" at the seat tube but only drop the rear axle by 2" to get the right geo, this thing rides awesome". Of course we'll see neither of those, because the first guy would rather toss his bike in the garage and forget about it than admit his mistake, and the second guy would rather credit himself big_smile

We could once again just let these comments fade into the background.

Last edited by Crashman (2018-03-03 11:40pm)


Wanted: Inexpensive lot of cheap 7/8" bars for grandkid's bikes. I will paint as needed.

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#75 2018-03-04 6:35am

Jesse96ss
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From: Tampa Florida
Registered: 2016-07-17
Posts: 1226
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Re: 20" to 26" conversion. Mid School dyno build

roll


Anyway... My girlfriend woke up to me using the kitchen as my work area lol

Oh and BTW I changed my mind on the color. It was a last minute decision but I’m happy with it. It’s Daytona yellow
http://uploads.bmxmuseum.com/user-images/234558/841950d2-6335-4920-ab4a-cc7cd790cd235a9c043a7a.jpeg
http://uploads.bmxmuseum.com/user-images/234558/ac036e22-521b-421b-8ffa-41c4fc5fb0da5a9c043a18.jpeg
http://uploads.bmxmuseum.com/user-images/234558/6f647574-4e73-41c2-bef3-fbe99c3e5d825a9c043b2b.jpeg

Last edited by Jesse96ss (2018-03-04 6:39am)


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Screw J&R bmx “superstore”

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