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S.Brothers

10 lb bike circa 1981 Powerlite in BMX plus

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18 hours ago, dav451 said:

WOW! That JU racing mini frame is pretty cool. The rest are just plain cool. LOL

Thanks!

 

The real beauty of this frame, is the seat and chain stays.

DSC01571.JPG

 

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I've been toying around with the idea of a aluminum spindle and aluminum hub axles. I know Profile offered aluminum spindles with the Magnatanium. I've also seen aluminum hub axles in Nukeproof hubs. I have a blazer that was built in the early 80s with a custom aluminum bottom bracket so I at least know that was possible for a early 80s build. Not sure if aluminum axles were available. Seams like there was a aluminum chain available at some point as well. That or a titanium chain, can't remember brand, maybe Regina. Then maybe a Tuf Neck 4.9 stem. Those were available as soon as 84' maybe 83' I think. Theres also aluminum pedal spindles. I know HARE pedals had aluminum spindles and of course the bodies were plastic.

Edited by Aaron Godfrey

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Somewhere in my pile of parts are aluminum thru bolt axles (one is broken) for a Bullseye Hubs and if memory serves a magnesium one.

So yes such things exist.

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Finding ways to 'shave' weight off a bicycle is nothing new, before O.M.A.S. (originally a manufacturer of carburetor parts for the automobile industry) began making components (e.g. hubs, headsets, bottom brackets), their introduction into cycling was by offering aftermarket kits of lightweight titanium brake bolts and alloy nuts for Campagnolo brake sets and eventually titanium pedal spindles. Cobra, another Italian brand offered similar lightweight offerings, mainly alloy water bottle cages, seat post binder bolts and stem bolts for Cinelli & 3ttt stems.

O.M.A.S. 150 Brake Bolt Kit

O.M.A.S. titanium pivot bolts.jpg

 

 

Crupi evolved in a very similar fashion, by manufacturing aftermarket aluminum components.

 

 

C&G Aluminum BMX Components (Dealer Catalog & Price List)

Free Agent Dealer.JPG

Catalog Detail.JPG

Page Detail.JPG

 

 

 

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Profile magnesium hubs. There was also a magnesium mini stem prototype. And then there’s drilling and cutting. So many choices. This is why I like mini’s. They are like dry lake hot rods. Built for all out speed.

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On 2/19/2020 at 2:51 PM, dubplatestyle said:

Thanks!

 

The real beauty of this frame, is the seat and chain stays.

DSC01571.JPG

 

That is nice looking. 

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I'm getting closer, but there's still a lot more to do.

 

Modified Campy Cranks.JPG

Shortened and modified 'campy' cranks (approx. 155mm in length)

O.M.A.S  Cartridge Bearing Bottom Bracket (Alloy bearing cups & aluminum spindle)

34T Specialites T.A. Chainring.

(Total combined weight): 585 grams

 

 

Demco Futura X Pedals.JPG

Demco Futura X Pedals w/ modified cages and titanium spindles

(Total combined weight): 212 grams

 

 

SR Extra Super Light Stem (Titanium Hardware) .JPG

SR Extra Super Light Stem w/ Titanium Hardware (O.E.M.)

192 grams

 

 

Dia_Compe N500.JPG

Modified Dia-Compe N500 brake caliper w/ an O.M.A.S. (Titanium / Alloy) Brake Kit

(Weight as shown): 100 grams

 

 

 

 

 

 

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Looks like it’s coming along great. Can’t wait to see it completed 

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Just read through this Interesting thread- any updates?

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On 7/16/2020 at 2:10 AM, cwplanet said:

Just read through this Interesting thread- any updates?

Project was momentarily derailed due by Covid-19, but is now back in full swing!

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