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Flipper goes the extra mile

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Old 09-06-22, 04:54 PM
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prairiepedaler
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Flipper goes the extra mile

It appears this guy carves up old bike frames with disc brake braze-on mounts. Is this the finished product or does he paint it all up before it is sent to the buyer? How is one supposed to use the eyelets for fenders or racks on these frames?




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Old 09-06-22, 07:45 PM
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Finally, the vintage MTB scene gets it's own Drew.

...or is it a Reverse Drew when you add brazeons, but do it poorly and don't commit to refinishing what was a perfectly OK frame to start with?

-Kurt
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Old 09-06-22, 07:57 PM
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Nice braze work, but this guy better add a bit between the chain and seat stays to triangulate the disc brake

stolen from the interwebs:

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Old 09-06-22, 08:02 PM
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^ My first thought was those frames aren't designed for disc brake loads.

Originally Posted by cudak888
...or is it a Reverse Drew when you add brazeons, but do it poorly and don't commit to refinishing what was a perfectly OK frame to start with?
​​​​​​​A Werd.
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Old 09-06-22, 08:17 PM
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Whatever it is, I cannot imagine it profitable. Maybe this seller is unloading the work of some torch-wielding crackpot who has moved on.

If I died tomorrow, or suddenly lost interest in bikes, that might happen to my stuff, and people browsing ebay would be puzzled.
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Old 09-06-22, 09:20 PM
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Originally Posted by P!N20



​​​​​​​A Werd.
Works for me. 😁👍

Hey, did you end up aquiring that Guerciotti? I've wondered about that a bit, but misplaced that thread somewhere. 🤔😉
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Old 09-06-22, 10:34 PM
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Originally Posted by P!N20
A Werd.
A Werd? Word.

-Kurt
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Old 09-06-22, 11:12 PM
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Originally Posted by scarlson
Maybe this seller is unloading the work of some torch-wielding crackpot who has moved on.
Torch-wielding crackpots.

Has a certain ring to it, eh?
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Old 09-06-22, 11:34 PM
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If you're interested in one of the frames, send a note to the seller. Send them @gugie's reinforcement design.

And ask about the paint.

As far as racks, there are special disc brake racks that are designed to either mount behind the caliper, or space out around them.

Note, that most of the "modern" disc mounts have moved to a "direct mount" which puts the rear on the chainstay, and has fewer spacers to use overall. Plus it has easier access to the rack and fender mounts.

But, it may be a bit of a tight fit to get it all squeezed in under the seatstay.
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Old 09-06-22, 11:49 PM
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The fork is the more-troublesome part, with unexpected torsional/bending load being applied to the lower end of the left leg.

Hard use of the modified front brake will make the front wheel steer to the left, and outright fork leg failure is definitely not out of the question.

Disc-brake forks are made more bend-resistant compared to rim brake forks, and often utilize thru axle design to better connect the left and right legs together.
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Old 09-07-22, 12:23 AM
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Old 09-07-22, 05:33 AM
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Originally Posted by gugie
Torch-wielding crackpots.

Has a certain ring to it, eh?
"Brass-wielding torchpot" sounds even better.

Though usually we just call it Gugificazione.

Sorry, Gugie, couldn't resist the roast

-Kurt
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Old 09-07-22, 06:03 AM
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Originally Posted by P!N20
^ My first thought was those frames aren't designed for disc brake load.
Spot on. This would be a particularly bad idea on a frame such as this:


Repainted Capo (Otto Cap) Sieger frame, serial number very close to that of my other Sieger, so who was I to say no to it?

I don't see the point of the disc brake conversions anyway, since modern rim brakes with KoolStop pads work quite nicely. I was worried about inadequate stopping power on the Bianchi until I replaced the Campag. single-pivot sidepulls with Shimano dual pivots; no worries now!
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Old 09-07-22, 06:25 AM
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Originally Posted by scarlson
Whatever it is, I cannot imagine it profitable.
If he is careful he should be able to find old steel MTB frames for less than $100. Throwing on about $30 worth or parts.

Then reselling for $300.

Likely not huge profit, but many people are happy if they make enough money to keep doing their hobby.

Looking on Ebay, the unmodified frame values are all over the place. However, setting oneself outside of the crowd means they may move quicker.
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Old 09-07-22, 06:30 AM
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I’m most impressed by the fact that he removed the canti posts. A full commitment to modern braking technology!
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Old 09-07-22, 07:04 AM
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Originally Posted by prairiepedaler
It appears this guy carves up old bike frames with disc brake braze-on mounts. Is this the finished product or does he paint it all up before it is sent to the buyer? How is one supposed to use the eyelets for fenders or racks on these frames?

More to the point, that frame wasn't designed for disc brakes. It needs a gusset between the seatstay and the chainstay to reinforce the disc brake mount. And the fork should be replaced with one that is designed to handle disc brake loads.
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Old 09-07-22, 07:08 AM
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Originally Posted by JohnDThompson
More to the point, that frame wasn't designed for disc brakes. It needs a gusset between the seatstay and the chainstay to reinforce the disc brake mount. And the fork should be replaced with one that is designed to handle disc brake loads.
Funny, almost feels like I read that before somewhere with an example picture somewhere just above this post...
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Old 09-07-22, 07:39 AM
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@Kilroy1988 - Yeah there are "echoes" all over this forum. Part of the charm. You might remember reading a now important bit of information but can't recall where. The truth is that it might be in multiple locations! It also drives home a point.
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Old 09-07-22, 08:17 AM
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Originally Posted by CliffordK

Note, that most of the "modern" disc mounts have moved to a "direct mount" which puts the rear on the chainstay, and has fewer spacers to use overall. Plus it has easier access to the rack and fender mounts.

But, it may be a bit of a tight fit to get it all squeezed in under the seatstay.
This.
As someone who builds a couple of hundered bikes a year out of the box I HATE this design.

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Old 09-07-22, 09:09 AM
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Originally Posted by cudak888
"Brass-wielding torchpot" sounds even better.

Though usually we just call it Gugificazione.

Sorry, Gugie, couldn't resist the roast

-Kurt
Looks like a leading candidate to replace "The Bike Butcher of Portland"
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Old 09-07-22, 02:46 PM
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Perhaps it is not too far off-topic when I ask, Why do this?

The two instances of disk brakes which I have had were both disasters. I would not want disk brakes on a road bike, period. For me, it is a non-starter.

My brakes work just fine. I can modulate them from minor slowing to the point of skidding the tires. What is the point?
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Old 09-07-22, 04:33 PM
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One big advantage of modern disc brakes is that you can swap wheel sizes without needing to deal with the reach (or lack thereof) of brake calipers. I have two current bikes in the fleet that run disc brakes, and using 650b or 700c wheels is no problem.
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Old 09-07-22, 04:57 PM
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Is that Mercet fillet work? Maybe your eyes aren't trained enough to appreciate it.
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Old 09-07-22, 09:06 PM
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Originally Posted by Bad Lag
...I would not want disk brakes on a road bike, period. For me, it is a non-starter...
The subject bikes are all mountain bikes. With 36 years of MTB experience I can assure you that disc brakes make a big difference on any kind of steep or technical terrain. Try it and find out for yourself.

For his sake I hope the fellow who is selling these bikes has a good liability insurance policy. As others have pointed out, he does not grasp the forces exerted on a frame and fork by disc brakes. For their sakes I hope that he doesn't find any customers who are going to use the bike for anything more than a sedate ride around the block.
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Old 09-07-22, 10:43 PM
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Originally Posted by gugie
Looks like a leading candidate to replace "The Bike Butcher of Portland"
Fine with me, but I call royalty dibs on the new trademark

Originally Posted by obrentharris
The subject bikes are all mountain bikes. With 36 years of MTB experience I can assure you that disc brakes make a big difference on any kind of steep or technical terrain. Try it and find out for yourself.
I'll give discs one more leg up: Less finicky than V-brakes.

Granted, none of my fleet goes off-road, but of the one bike in my rotating circle of equipment, exactly one - which gets a fair amount of use - has V-brakes which constantly shift out of alignment regularly, at random, despite proper setup, Teflon lined cables, and verification of free travel. They're not el-cheapos either, they're a set of Deore LX arms too. I can definitely see the appeal of disposing of them in favor of V's.

-Kurt
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