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thx1138 |
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 thx1138 World Chat Champion

Joined: 06 Oct 2005 Karma :    
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thx1138 |
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 thx1138 World Chat Champion

Joined: 06 Oct 2005 Karma :    
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 Posted: 00:02 - 13 Aug 2019 Post subject: |
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stinkwheel |
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 stinkwheel Bovine Proctologist

Joined: 12 Jul 2004 Karma :    
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 Posted: 11:07 - 13 Aug 2019 Post subject: |
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stinkwheel |
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 stinkwheel Bovine Proctologist

Joined: 12 Jul 2004 Karma :    
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 Posted: 11:17 - 13 Aug 2019 Post subject: |
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You could probably transplant the vast majority of the parts off your current bike onto a second hand frame and convert it to single speed for well under £100.
I'd want mudguards on the one you posted and you won't fit conventional ones under the callipers.
I'm actually building a single speed bike today after work. Well, getting the drivetrain in and chainline checked. Probably treat it to a new bottom bracket anyway even if the line is bang on perfect. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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MCN |
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 MCN World Chat Champion

Joined: 22 Jul 2015 Karma :  
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 Posted: 12:03 - 13 Aug 2019 Post subject: |
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Cheap frames.
Could have killed you.
Look for double butted.
https://www.bikeexchange.co.uk/blog/bike-frame-materials-explained
In the meantime. Fire some duct tape around it.  ____________________ Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN. |
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stinkwheel |
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 stinkwheel Bovine Proctologist

Joined: 12 Jul 2004 Karma :    
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MCN |
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 MCN World Chat Champion

Joined: 22 Jul 2015 Karma :  
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 Posted: 13:57 - 13 Aug 2019 Post subject: |
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stinkwheel wrote: |
Meh. My broken one was 46 years old so I suspect straight-up metal fatigue.
My "new" one is 531 tubing. Not double butted though. Steel FTW.
@thx1138. I'm pretty enthusiastic about single speed/fixie builds and I've done a few so if you decide to do one of your own, I'm happy to help with hints and tips...
I'll just leave this here.
https://www.planetx.co.uk/i/q/FRHOZPHSS/holdsworth-zephyr-frameset |
I wonder how many people ride a bicycle and have no care as to how it is made or what a bicycle is 'really'?
The thing that always makes me a bit nauseous is when I see someone peddling along with the insteps of their feet. Blooorg.
This shit will NEVER be old.
https://archive.org/details/richardsbicycleb00rich
More Filthy Frame Pron
https://www.reynoldstechnology.biz/
Reynolds re-thunk frame building.
First time I saw a Titanium frame bike for sale in Dales of Glasgow. It was about £2000+ 1990s prices. I thought, 'Who needs a frame that costs that much?' Then I looked more closely at racing bike frames.  ____________________ Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN. |
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Easy-X |
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 Easy-X World Chat Champion

Joined: 08 Mar 2019 Karma :   
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 Posted: 15:44 - 13 Aug 2019 Post subject: |
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A dab of JB Weld will sort that right out  ____________________ Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter |
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recman |
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 recman World Chat Champion

Joined: 26 Mar 2012 Karma :   
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thx1138 |
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 thx1138 World Chat Champion

Joined: 06 Oct 2005 Karma :    
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stinkwheel |
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 stinkwheel Bovine Proctologist

Joined: 12 Jul 2004 Karma :    
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 Posted: 11:41 - 16 Aug 2019 Post subject: |
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There are various types of bottom bracket/crank after cotter pins.
Cheapest/most basic is the square taper (so square hole in the end of the crank). Then there is a slightly more high-tech octolink which has a splined taper (and splined hole).
More modern ones have threadless "hollowtec" bottom brackets. You can see all the way through the middle of these.
Assuming it's a square taper, you'll need a pulling tool to remove the cranks from the bottom bracket then a special splined tool to remove the BB itself.
That said, I don't bother my arse re-using bottom brackets these days unless they are high end ones. They are invariably a ball-ache to remove and do you want to fit a worn one? If it's not coming undone, remember one side is a reverse thread. Also bolt the tool to the bottom bracket using a large repair washer then get a socket and breaker bar on it. I've seen me have to resort to adding 3ft of scaffolding tube on the end to loosen one.
Also, if you're making a single speed/fixie, you invariably need to swap out the BB for one that's a different length to get the chain line correct. I usually keep hold of an old one of a known length, fit that, see how far out it is and order the correct one.
So the build I'm doing now had a 112mm bottom bracket fitted. The chainline (the offset between the front and rear cogs) is 5mm out with the drivetrain componants I'm using (this is a long way out). I just ordered a 103mm bottom bracket for it which should bring it to within 0.5mm.
If you want to find out anything about bicycle mechanics in extreme detail, do a google search for the thing and add the words "Sheldon Brown". He has written articles on everything. There is a lot of stuff about single speed and fixies there too.
https://www.sheldonbrown.com/singlespeed.html ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Irezumi aka Reuben |
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 Irezumi aka Reuben Carrot Top
Joined: 28 Sep 2004 Karma :  
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Old Thread Alert!
There is a gap of 1 year, 19 days between these two posts... |
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thx1138 |
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 thx1138 World Chat Champion

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