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-   -   Ultimate Bike Thread.... (http://forums.pelicanparts.com/showthread.php?t=720544)

greglepore 02-16-2025 06:19 AM

Quote:

Originally Posted by LEAKYSEALS951 (Post 12411704)
More progress on the Xi Zinping express. Got some rivenuts and mounted a braze on type front derailleur clamp and a 3rd water bottle mount to the downtube.


The downtube was scary thin, so I added some layers of CF, which is drying as we speak. Add some packing tape, baseboard electric heat, and viola! The bike is becoming alive!!!!:D

I have just the saddle for that bike...either a carbon flite or a slightly damaged Berk that you can repair...

LEAKYSEALS951 02-16-2025 08:55 AM

Quote:

Originally Posted by greglepore (Post 12411922)
I have just the saddle for that bike...either a carbon flite or a slightly damaged Berk that you can repair...

Sweet! :) Rain stopped- going for shakedown spin.

http://forums.pelicanparts.com/uploa...1739724865.JPG

Racerbvd 02-16-2025 11:29 AM

http://forums.pelicanparts.com/uploa...1739734046.jpg
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look 171 02-16-2025 12:02 PM

Bryon, tell me about those phone numbers? Only 5 digits with a hyphen after the first number? Is that how they use to do this?

herr_oberst 02-16-2025 01:00 PM

Byron, Where did you get those dubraes?

Racerbvd 02-16-2025 02:01 PM

Quote:

Originally Posted by look 171 (Post 12412153)
Bryon, tell me about those phone numbers? Only 5 digits with a hyphen after the first number? Is that how they use to do this?

That’s a phone book for 1951 Jacksonville Florida .
I forget how it works , but that’s where the Brumos name came from.http://forums.pelicanparts.com/uploa...1739743225.jpg
http://forums.pelicanparts.com/uploa...1739743275.jpg

Jeff Higgins 02-16-2025 02:58 PM

Try to ignore the crusty old curmudgeon squinting and trying to see the screen on his phone...

Jerry Baker Memorial Velodrome at Marymoor Park in Redmond, Washington.

http://forums.pelicanparts.com/uploa...1739746397.jpg

LEAKYSEALS951 02-19-2025 01:42 PM

Schwinn is looking good! I wish we had a velodrome on near us. ^

Snow day today. All about process. Wanted to try some yellow/amber shellac. The tape started off yellow, became honey brown. Still too yellow for my taste. I went darker and added cordivan leather dye. Now it's a dark red/brown. Almost a burgundy. Looks better in person. That's a day long process to make something that's gonna get it's arse covered in dirt in the first ride. :)


http://forums.pelicanparts.com/uploa...1740000673.JPG
http://forums.pelicanparts.com/uploa...1740000673.JPG


Also mounted road/gravel width cranks into wide mtb width bottom bracket. Not easy task. Much redneckifying later, it actually works!


http://forums.pelicanparts.com/uploa...1740000673.JPG
http://forums.pelicanparts.com/uploa...1740000673.JPG
http://forums.pelicanparts.com/uploa...1740000673.JPG

Now to wait for the snow to melt! :D

LEAKYSEALS951 03-07-2025 06:51 PM

<iframe width="560" height="315" src="https://www.youtube.com/embed/t6et5l8uMV4?si=9Ahkq2AwUZKPFRTS" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

Racerbvd 03-13-2025 09:20 PM

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Racerbvd 03-13-2025 09:22 PM

http://forums.pelicanparts.com/uploa...1741926085.jpg
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David 03-17-2025 06:37 AM

Quote:

Originally Posted by Racerbvd (Post 12428319)

We sold Nomura bikes (frames) at the shop I worked at in the early 80's. We were blown away by how light they were. Probably the nicest BMX frame I saw back in my bike shop mechanic days.

Racerbvd 03-17-2025 11:08 PM

http://forums.pelicanparts.com/uploa...1742278016.jpg
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look 171 03-18-2025 12:11 AM

Anyone know why the forks are inverted in those high speed bikes and the use of smaller wheels up front?

Racerbvd 03-20-2025 03:28 AM

Quote:

Originally Posted by look 171 (Post 12430562)
Anyone know why the forks are inverted in those high speed bikes and the use of smaller wheels up front?

I would think that those forks would be less stable like that.http://forums.pelicanparts.com/uploa...1742466403.jpg
http://forums.pelicanparts.com/uploa...1742466403.jpg
http://forums.pelicanparts.com/uploa...1742466403.jpg

Scott Douglas 03-20-2025 01:54 PM

Looking at the geometry of the front of that bike, I'd think the inverted fork would act more like a caster wheel does. At high speed it'd just wiggle waggle back and forth without really having any effect on the steering of the bike. I could be wrong, but that's how I see it working. Smaller wheel is required because the axle has moved backwards closer to the frame. A big one probably wouldn't fit.

CurtEgerer 03-20-2025 06:56 PM

http://forums.pelicanparts.com/uploa...1742522203.JPG

look 171 03-21-2025 12:45 AM

Quote:

Originally Posted by Scott Douglas (Post 12432127)
Looking at the geometry of the front of that bike, I'd think the inverted fork would act more like a caster wheel does. At high speed it'd just wiggle waggle back and forth without really having any effect on the steering of the bike. I could be wrong, but that's how I see it working. Smaller wheel is required because the axle has moved backwards closer to the frame. A big one probably wouldn't fit.

Shorter wheelbase on higher speed should make it less stable? Maybe the bike has stretched geometry to compensate for that?

LEAKYSEALS951 03-21-2025 02:31 AM

I always thought the small backwards fork thing was to allow these high geared bikes to pull in closer to the vehicle they were drafting behind.
p-car picture in link:
https://www.roadandtrack.com/motorsports/a21564154/porsche-935-jean-claude-rude-bike-speed-record/

CurtEgerer 03-27-2025 06:11 AM

http://forums.pelicanparts.com/uploa...1743081070.jpg


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