Picture of Single Speed on the Cheap
Want to see what everyone is talking about with this whole 'Single speed revolution?' Before you commit several hundred dollars to a single speed bike, try it out on your current bike without costing you a dime. All you need are basic bike tools to get it done.

Step 1: Choosing a Bike

Picture of Choosing a Bike
Since the aim of this project is cheapness, use a bike you have laying around. Many bikes will work for this, as long as it has one crucial component, a horizontal ( or horizontal-ish) dropout. While it is possible to convert a bike with any dropout to single speed, it takes either a great deal of time or money, neither of which are appropriate for testing the waters of single-speed bikes.

Other things to look for:
If the bike has horizontal dropouts, it will work, but if you have the choice, get a frame without brazed on cable stays. They will only affect how your bike looks, but appearance does count sometimes, and single speeds look cool, so why mess with it.
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MaxwellC11 month ago
rmcfisher3 months ago
Just go to a local bike shop and buy a cassette Freewheel!!!!! It will look so much better! I got one for like 6 bucks. And spring for the tool or use a screw driver and a hammer

The chain line chooses the ratio? That's a very sketchy way to convert. Given you are pulling the bike apart, dismantle the cassette and find another one to pull to bits. Use the spacers to space out the correct ratio cog and use a magic gear ratio to get the right tension.

Here's a more thorough guide you may find useful: http://www.ridemorebikes.com/single-speed-conversion-guide/

upnorth7773 years ago
I've just tried this on a dumpster bike I'm restoring. I'm going to spring for a conversion kit. But so far it works.
I have personally tried this method and it was a bad decision. The rear wheel kept slipping when the chain jumped onto a higher gear and locked up the drivetrain so I tightened the wheels a lot more. In the end the dropout snapped because the wheel couldn't slip forward.

This MIGHT work if the chainline is PERFECT but not for a long time.

80 bucks will buy you a new rear wheel without looking that hard.
tradtimbo6 years ago
Are people still doing this? This instruct-able needs to be removed. It just makes a bike more dangerous. If you want one gear, do a proper conversion, or don't shift. read more here: http://thesustainablecyclist.com/2009/05/24/single-speed-bicycles-the-wrong-way/

...she said-'without a chain tensioner and adjustments to rear cassette/freewheel,the bike keeps wanting to align the front chainring and the rear cogset-which locks up the drivetrain,and at times breakes the chain '...and without a chain or all the parts you removed,how you gonna STOP !?!?
Wasagi chadeau4 years ago
And Fuzz clearly stated that the gear ratio is mostly determined by the alignment of the chain, so once you get the tension tight enough, it won't need to derail itself, although a thicker gear would be nice, multi-gear bikes tend to have fairly thin gears.
Wasagi - Even if your chain alignment is perfect, when the bike flexes so the cogs and chainrings get closer together, the chain will slack a bit. If during this slack time, the chain is "bounced" or engages the adjacent larger cog your in for some problems.

This setup is dangerous and pointless. pointless because the main goal of creating a single speed from a multi speed bike is to simplify and lighten. This setup does neither.
...also see Chainbreakers' book by same title...this is the most DANGEROUS way to make a Bike,Period...Pull this Instruct !!!
 dangerous? how? (i actually want to know!)
 lol nevermind sorry wasn't looking at the links

chadeau4 years ago
Dawn dishwashing liquid,and you canget it scented,too !
BtheBike4 years ago
Great tutorial ! Other options for bikes:

* the derailier can be used as a tensioner .
* Spacers can be added to the bottom bracket for perfect chain line
* half links area cheap way to get a tight chain
* If not running a back brake the whole rear wheel can be slid horizontally on the axle
for good chain line.

Dig the Detergent . Works great as a bike degreaser . Lb for Lb nothing is cheaper. I just de-gunked a 30 year bike with 1 oz of liquid laundry detergent , toothbrush and hose .
pdlbooboo4 years ago
couldn't wait till the day to take the pics lol
i use a "torpedo rear brake hub"
qdogg7 years ago
I really don't understand why you would want to do this! If you want only one speed just don't shift the gears.
I'm completely with you!
mrdepo965 years ago
 Could you put a piece of plastic around the sides of the cog that you wanted so it wouldnt jump? Also would a chain tensioner help keep it on?
gear-guy6 years ago
when i did this with my old bike recently,i couldnt get the front one off cleanly becaause the bolt was rusted hard onto the nut.i couldnt find a hacksaw,so i used pliers to get a few of the importand bits off and then used a big hammer to force the rest off.lol
phreek6 years ago
generally, those who remove the rear brakes do so because their bike is set up "fixed gear" style, so the fact that they provide rear wheel braking by resisting on the pedals deems a rear brake assembly unnecessary.
are you some kind of special stupid? listen to tradtimbo
On the note of this becoming less dangerous, anyone know how to remove gears from a cassette or freewheel. Or if this is even possible.
It has been a while since you have posted this but if you still need an answer perhaps this will help. www.sheldonbrown.com/images/freewheel-vs-k7.jpg As you can see it depends on which set up you have. If you have the older set up where stuff threds onto the hub then it should not be a problem. I know this because I just changed two wheels down to single speed this way. One of them I welded into a single speed fixed gear hub, so far so good. If I like the fixed setup I am going to make a proper fixed gear wheel. If you have the new set up with a free hub and cassette then you can buy spacers and a special cog and just get rid of the whole cassette. Check out Charley the bikemonger on YOu tube he does a better job showing rather then me telling. I hope this helped.
krak_attak6 years ago
thanks for the idea. got an 86 mesa runner from my neighbor and its been years since i rode a bike. i live in florida we have zero hills. the terrain is flat, flatter, flattest, and then a few bridges which i have to walk it over anyway so a single-speed is perfect... AND I LOVE BACK PEDDLING! i understand the risk of chain pop and slippage from gears meant to have a chain slip off but i was not about to drop 40 bux or more buying s.s. gears before i find my comfort zone. so again... thanks man.
tradtimbo6 years ago
This is a dangerous setup, and you should not promote it. People have gotten hurt using this setup. Please read the following: http://timmcgivern.wordpress.com/2008/09/23/single-speed-bicycles-the-wrong-way/

Thank you
Fuzz2050 (author)  tradtimbo6 years ago
While the article you linked to does make sense, and it would be prudent to replace the multi-speed freewheel with a single, I think the dangers are greatly exaggerated. I rode my bike for many hundreds of miles like this, with no trouble, and I know of countless others who have done the same. If the bike were to auto-shift the way you describe, it seems much more likely that the chain would snap, or the wheel would come loose in the dropouts. Under both of these situations, the bike is still fully under your control, and no major harm is done. I find it hard to imagine that the force holding your wheel in place is greater than the strength of your bike frame. It seems that so long as the rider keeps the chain properly tensioned, and they keep both brakes on the bike, the risk of this is very low, and the consequnces less than dire. I have not heard of a single accident caused in this matter, but if you have, please post some more details. I'm more than willing to be proved wrong on this.
In the link I provided to the blog there is a link to a BikeForumsBikeForums discussion on this very thing. Two users in the conversation, including myself, have had accidents with this set up. The axle bolts were very tight on the bike I used because I wanted to keep the tension tight. The bike folded. Steel bike chain stays are not designed for that moment (force x distance) at the joint. Chains are very very strong in tension because this is the force they are designed to take.

If your chain tension is good and the larger cog adjacent to the cog you have the chain on is a few teeth larger, then your probably ok as you said. final point: It doesn't make much sense to make a bike potentially more dangerous if your not really making it lighter. The freewheel is the heaviest component removed in a conversion. I want people aware of the danger.
negnin6 years ago
I use coffee ground.
zzpza7 years ago
working on your bike, on your bed? crazy! ;)
Bit harder to bust your knuckles on the bed when you slip with a wrench though.
Wish I'd thought of that. Bruised mine pretty well taking apart an old tire on a wooden floor.
That sounds like fun. Better bruised than busted, though. At least it wasn't concrete or asphalt.
Woodenbikes7 years ago
For more tips on How to use a chain tool
Grey_Wolfe7 years ago
Personally, the ONLY time I use the front break is when I need more stopping power than my rear can produce alone. I don't hit the front break by itself. Gravel's not my favorite flavor. lol

You'll never have to taste gravel or asphalt if you follow this great advice=]
No, I like the taste of asphalt. Just not gravel. lol Actually, there is some very sound advice on that site.
gojo orange hand cleaner. nuff said.
seriously, GoJo is lightweight compared to laundrey detergent like he said. Give it a shot you will be amazed.
bedbugg27 years ago
not to be nasty or anything but why would you want to just want to have one gear?
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