Building a 12 pound fixed speed bike. Possible?
#27
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I really want one, do a ten mile ride out to a camp spot, rucksack and a few bags on the bike, take my time enjoying the scenery. Or just something to ride around to the pubs on, be a right laugh.
#28
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Good source and mechanism of frame is holding me back
Hi Guys,
I'm going to do this! But what's holding me back is a good reputable frame supplier. The only sub $600 sub 1500g are from China and just reading through people's experiences its a minefield between dodgy sellers and the blame game if the item gets damaged in transit.
Can anyone suggest a good source and a good mechanism (I believe this should be Ebay due to its protection for buyers).
I'm going to do this! But what's holding me back is a good reputable frame supplier. The only sub $600 sub 1500g are from China and just reading through people's experiences its a minefield between dodgy sellers and the blame game if the item gets damaged in transit.
Can anyone suggest a good source and a good mechanism (I believe this should be Ebay due to its protection for buyers).
#29
Calamari Marionette Ph.D
Fun? Yes. Ten miles? I don't think I'd last that long. I think the novelty would wear off by the time I got to the end of my street. It would be great inside a factory or warehouse.
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1587g for the Aventon Diamond frameset with Carbon seatpost and full carbon fork.
Depending on color, you are priced from $299-$499.
https://www.aventon.com/collections/...d-frames-bikes
Depending on color, you are priced from $299-$499.
https://www.aventon.com/collections/...d-frames-bikes
#31
Calamari Marionette Ph.D
1587g for the Aventon Diamond frameset with Carbon seatpost and full carbon fork.
Depending on color, you are priced from $299-$499.
https://www.aventon.com/collections/...d-frames-bikes
Depending on color, you are priced from $299-$499.
https://www.aventon.com/collections/...d-frames-bikes
#32
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Probably as close as he will get for his price range and not wanting to go the China route...
#33
Calamari Marionette Ph.D
#34
~>~
With modern lightweight CF road frames built w/ vertical dropouts, 13O rear spacing and press-fit bottom brackets how are you planning to accommodate adjusting/tensioning the chain on a re-purposed FG with those specs?
-Bandera
edit for spacing error
-Bandera
edit for spacing error
Last edited by Bandera; 11-25-17 at 06:29 PM.
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There's a couple different methods... White Industries makes a hub with an eccentric axle, it probably comes in 135mm but you could probably space it if needed. I think Sheldon Brown or someone has a "perfect gear" calculator that will match up gear combos for a specific chainstay length.
#36
~>~
There's a couple different methods... White Industries makes a hub with an eccentric axle, it probably comes in 135mm but you could probably space it if needed. I think Sheldon Brown or someone has a "perfect gear" calculator that will match up gear combos for a specific chainstay length.
Getting an acceptable chainline on a FG conversion should be priority #1 in planning this project. If the drivetrain wont function it doesn't matter what the machine weighs. This used to be a simple task w/ steel frames that were, or could be cold set to, track standard 120 spacing, horizontal dropouts w/ the length needed to tension the chain and threaded bottom brackets w/ many spindle lengths available for a perfect chainline. Eccentric hubs and BBs are available but with the wide press-fit BB shell, short chainstays and 130 spacing on modern CF road frames I'd work all of those issues out before spending a $ on the project.
I'd certainly ride a 12LB FG CF road frame conversion on my LD/FG rides w/ all of the modern doo-dads if done properly.
Good luck, sounds interesting.
-Bandera
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Meant 130, sorry 'bout that.
Getting an acceptable chainline on a FG conversion should be priority #1 in planning this project. If the drivetrain wont function it doesn't matter what the machine weighs. This used to be a simple task w/ steel frames that were, or could be cold set to, track standard 120 spacing, horizontal dropouts w/ the length needed to tension the chain and threaded bottom brackets w/ many spindle lengths available for a perfect chainline. Eccentric hubs and BBs are available but with the wide press-fit BB shell, short chainstays and 130 spacing on modern CF road frames I'd work all of those issues out before spending a $ on the project.
I'd certainly ride a 12LB FG CF road frame conversion on my LD/FG rides w/ all of the modern doo-dads if done properly.
Good luck, sounds interesting.
-Bandera
Getting an acceptable chainline on a FG conversion should be priority #1 in planning this project. If the drivetrain wont function it doesn't matter what the machine weighs. This used to be a simple task w/ steel frames that were, or could be cold set to, track standard 120 spacing, horizontal dropouts w/ the length needed to tension the chain and threaded bottom brackets w/ many spindle lengths available for a perfect chainline. Eccentric hubs and BBs are available but with the wide press-fit BB shell, short chainstays and 130 spacing on modern CF road frames I'd work all of those issues out before spending a $ on the project.
I'd certainly ride a 12LB FG CF road frame conversion on my LD/FG rides w/ all of the modern doo-dads if done properly.
Good luck, sounds interesting.
-Bandera
I will stay tuned to see how this pans out if the OP persists... I hope they keep us posted.
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The Cinelli Parallax is pretty light (claimed 1500g for the frame) if you can still find one.
#39
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Isn’t that the one with massive toe / front tire overlap ? Not the best choice IMO for general riding, especially for someone unfamiliar with fixed gear riding.
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Yeah, well a 12lb build is also not the best choice IMO, so I'm really just indulging the ridiculousness of it.
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Late to the party again
Well, OP, as mentioned previously - the only thing holding you back is dollars (and imagination too, I suppose).
Try searching more around this subforum - IIRC there is(was?) a poster in this group who has the discontinued super-lightweight Gates-drive crabon Trek SS on which he spent a lot lightening it even more.
Admittedly, I have some weight-weenie tendencies myself and just for s***zngiggles, occasionally build-up my own roadified steelie track bike as a "lightweight". Not a single bit of crabon, and besides my slightly higher-end frame and fairly light wheelset, none of the other bits are particularly light or expensive, and it still comes in a hair over 15 lbs...
Well, OP, as mentioned previously - the only thing holding you back is dollars (and imagination too, I suppose).
Try searching more around this subforum - IIRC there is(was?) a poster in this group who has the discontinued super-lightweight Gates-drive crabon Trek SS on which he spent a lot lightening it even more.
Admittedly, I have some weight-weenie tendencies myself and just for s***zngiggles, occasionally build-up my own roadified steelie track bike as a "lightweight". Not a single bit of crabon, and besides my slightly higher-end frame and fairly light wheelset, none of the other bits are particularly light or expensive, and it still comes in a hair over 15 lbs...
#42
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1587g for the Aventon Diamond frameset with Carbon seatpost and full carbon fork.
Depending on color, you are priced from $299-$499.
https://www.aventon.com/collections/...d-frames-bikes
Depending on color, you are priced from $299-$499.
https://www.aventon.com/collections/...d-frames-bikes
But my ALU CAAD 12 frame is 1100grams and a cheap CF roadbike frame from China is 900 grams (see Cheapest Carbon Fiber Frame or Bike 3rd post).
So why aren't there 900gram CF track framesets?
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See this what I don't get. That frame is 1600grams.
But my ALU CAAD 12 frame is 1100grams and a cheap CF roadbike frame from China is 900 grams (see Cheapest Carbon Fiber Frame or Bike 3rd post).
So why aren't there 900gram CF track framesets?
But my ALU CAAD 12 frame is 1100grams and a cheap CF roadbike frame from China is 900 grams (see Cheapest Carbon Fiber Frame or Bike 3rd post).
So why aren't there 900gram CF track framesets?
#44
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See this what I don't get. That frame is 1600grams.
But my ALU CAAD 12 frame is 1100grams and a cheap CF roadbike frame from China is 900 grams (see Cheapest Carbon Fiber Frame or Bike 3rd post).
So why aren't there 900gram CF track framesets?
But my ALU CAAD 12 frame is 1100grams and a cheap CF roadbike frame from China is 900 grams (see Cheapest Carbon Fiber Frame or Bike 3rd post).
So why aren't there 900gram CF track framesets?
Why is it always roadies that get a bug up their ass for a FG/SS/Tarck bike who make such a big deal about having one that is ultra-light? Using the rationale that since their alu or crabon wunderbikes are so light to begin with, that a bike without gears or brakes should be proportionally even lighter?
First - Having ridden a buddy's Caad 10 (which was a nice bike), I doubt your claim earlier in this thread that your 105 equipped Caad 12 weighs 17 lbs is accurate and is more likely optimistic by at least a pound or two.
Second - I see that same 1100g weight claim you made for the frameset everywhere - but without substantation, and not being made by C'dale themselves...so perhaps your premise is not based in reality.
Finally - what TenGrainBread (and multiple others) said
All that being said - for your purposes, maybe you ought to look into a Caad 10 Track. It was pretty expensive, and apparently didn't sell very well so not long ago was being dumped all over the place for 1/2 price - but it seems right up your...alley.
Good luck...
#46
~>~
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Seriously, the sooner you realize that an ultra lightweight track frame is completely pointless, the easier this will be.
#49
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I really feel like there ought to be an event for these bikes - fixed-gear hill time trials so that people who want to put drillium in the titanium have a raison d'etre.