Question: Hello everyone I bought a lotus 2000r and am currently converting it into a single speed. 

(Generic photo of a lotus 2000r from google images)
[![enter image description here](https://i.stack.imgur.com/jQ82L.jpg)](https://i.stack.imgur.com/jQ82L.jpg)

I wanted to know if I can put this wheel from Amazon 

[![enter image description here](https://i.stack.imgur.com/2zdYx.jpg)](https://i.stack.imgur.com/2zdYx.jpg)
[https://www.amazon.com/Wheel-Rear-1-1-Silver-Bolt/dp/B000AO3GK2](http://rads.stackoverflow.com/amzn/click/B000AO3GK2) 

Then use a cog like this
[![enter image description here](https://i.stack.imgur.com/NtgSp.jpg)](https://i.stack.imgur.com/NtgSp.jpg)

<http://www.jensonusa.com/Shimano-DX-Single-Speed-Freewheel>
on that wheel. Thanks for the help.

Answer: 
You should get away with the new freewheel by itself, simply take the freewheel off the current wheel and fit that.

You will need a chain tool to shorten your chain, and depending on the dropouts you may need a chain tensioner, or you might be lucky.

Note that while you don't need new chainrings, you won't be able to shift front gear without either a chain tensioning arm, or leaving the rear derailleur in place, to take up the slack.
You will definitely have to adjust the chainline regarding...

* crank arm, front sprocket position on axis
* rear hub in rear wheel: It should be centered. True it via spokes and/or insert new spokes.
	+ if not (enough), you can level the sprocket w/ spacers
	+ always check the centering: rim in frame. You might need spacers for the rear hub (in frame) as well.