#10 in Bike drivetrain components
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Reddit mentions of SHIMANO SF-1200 Single Speed Freewheel (16Tx1/8 1 Speed)
Sentiment score: 3
Reddit mentions: 5
We found 5 Reddit mentions of SHIMANO SF-1200 Single Speed Freewheel (16Tx1/8 1 Speed). Here are the top ones.
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For standard threaded hubsHardened steel for longevity and durabilityShimano Reference Number: SF-1200
Specs:
| Color | Black |
| Height | 1 Inches |
| Length | 3 Inches |
| Number of items | 1 |
| Release date | March 2012 |
| Size | 1-Speed |
| Weight | 0.38 Pounds |
| Width | 3 Inches |
That appears to be a freewheel-only threaded side of your hub.
To install all you need is a freewheel.
Now would be a good time to think long and hard about your (drivetrain) ratio, as freewheels are more expensive than cogs and come in a narrower range of teeth.
I'm not a mechanic, but you probably just need a new freewheel
https://www.amazon.com/Shimano-Single-Bicycle-Freewheel-Sprocket/dp/B001GSSIIG
And a tool to take the old one off and put the new one on
https://www.amazon.com/Park-Tool-Freewheel-Remover-Bikes/dp/B000AO9S68
it sounds like the pawls aren't engaging properly, probably rusty and/or gunky inside the freewheel.
Well, with those parameters, I'd consider building a single speed for your first build. Buy a freewheel, but use a salvaged crank, bb, chainring, handlebars, frame and whatever brake style the frame you're using is set up for: cantilever, caliper, v.
Here's an inexpensive 1/8" freewheel; that thicker size will mean that you'll use bmx-sized chains and chainring, rather than a thinner 9 or 10 speed chain. http://www.amazon.com/Shimano-SF-1200-Single-Speed-Freewheel/dp/B001GSSIIG/
That's way easier than messing with deraillers and cogsets on your first build. And when you're done, you don't have a fixie, but a bike with brakes.
http://www.youtube.com/watch?v=DU7c0_G29MA
basically the hub is like one of these.
then i screw a free wheel on to that, that has an open end like this as opposed to this. I then get an old school metal bottom bracket cup which has the same threads as the free wheel. I screw that into the freewheel and then the next free wheel on to that extension piece (the bb cup).
There is not a lot of driveline loss unless you really tighten the chain, than you really feel it. my chain tensioner (standard old road bike part) was keeping the chain way too tight.
I'm thinking this is the part I need to replace. This is what's kind of wobbly: http://www.amazon.com/Shimano-SF-1200-Single-Speed-Freewheel/dp/B001GSSIIG/ref=wl_it_dp_o_pC_nS_nC?ie=UTF8&colid=8GBDM6T90RO6&coliid=I3LLVFXCWL2V5T