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How to select cog for emergency single speed conversion with a broken derailleur

5 min read

Asked by: Courtney Scott

Can you ride with a broken derailleur?

A broken derailleur cable can occur without warning, leaving you with two options: Walk home or ride back in the hardest gear. However, there is a third, more desirable, option.

Can you use a cassette cog for single speed?

if you run a single cog from a cassette it will dig into your free hub body and could get stuck as a result making it impossible to ever fit a regular cassette back on there if you wanted to.

How do you fix a broken derailleur?


Quote from video: Pull the chain out and you're ready to remove the old derailleur. Most railers are fastened on with a hex bolt. So you'll need your allen keys for this most of the time you can reuse your shift cable.

How do you convert fixed gear to single speed?

Quote from video: And getting it converted to single speed it's a simple flip of the hub. I get that done. Just need to loosen the left and right axle nuts. And then loosen the chain tensioners.

Why do I keep breaking my derailleur?

If your chain is too long, and you are in the ‘small-small’ combination, it is possible for the derailleur to sort of fold up on itself. Flip your bike over and put it in the smallest gear up front and the smallest gear in the rear and make sure the chain isn’t rubbing on the derailleur.

What causes a derailleur to snap?

Some common reasons for it breaking are: Hitting an obstacle (e.g. tree branch) Going into the spokes (badly set low limit screw or the derailleur was wobbling enough for some reason to get caught in the spokes) Chain too short.

How do I convert my old bike to single speed?

Quote from video: Into a single speed bike in 10 easy steps step number one remove the bicycle chain from your bike. Use a chain tool to do that. Step two remove the shift cables and housings from your bicycle.

How do I convert cassette tapes to single speed?

Quote from video: Around i tapped the pins out. And took the gears or like the sprocket that i wanted off of it off of it. And then i slid it all back on like a normal cassette.

How do I make my single speed bike pedal easier?

If your single speed is difficult to pedal at slow speeds, purchase a front gear that is smaller or a back gear sprocket that is larger. If your bicycle is difficult to pedal at high speeds, increase the size of your front sprocket or replace your back sprocket with one that is smaller.

How do I know what derailleur I need?

If you are replacing an existing derailleur on a bike, simply count the number of cogs on your cassette and you’re good to go. If your drivetrain’s speed is an unknown quantity, you can count the number of steps that your shifter runs through and add ‘one’ to determine the number of gears your drivetrain has.

How much does it cost to fix a derailleur?

There can be a range of prices for replacement derailleurs, starting around $20 and going all the way up to $700.

How do you replace a derailleur?

Quote from video: Put the mech to the smallest sprocket using your sti's. Pull the cable crimp off the end of the inner cable using some pliers then undo the cable crimper bolt by unscrewing it anti-clockwise.

Why does my rear derailleur hanger keep breaking?

A chain that is too short for the chainset/cassette combination fitted. If you ever replace a chain make sure it’s the same length as the one removed. Debris in the chain and/or derailleur. Incorrectly indexed gears.

Are all derailleur hangers the same?

There are thousands derailleur hanger types (designs) on the market. Every frame manufacturer could have different sos hanger design for each model of frame and different sos hanger for same frame but manufactured on different year.

What is a gear hanger?

Quote from video: Похожие запросы

How much does it cost to fix a derailleur?

There can be a range of prices for replacement derailleurs, starting around $20 and going all the way up to $700.

Can you remove derailleur from bike?

It can be done. Sometimes it’s wise to not remove the derailer, though, but simply fix it in one position, as protection from the chain jumping off. Then you should attempt some hill climbs – or bike straight into a stiff headwind.

How do you reattach a rear derailleur?

Quote from video: To attach the rear mech back to the frame place the main bolt against the rear mech hanger. And use your five millimeter allen key to turn it clockwise until it bites.

How does a derailleur work?

Quote from video: With electronic shifting systems an electrical signal triggers a motor to move the linkage. There is no cable. Involved in these systems a derailleur cable passes through the housing to a shift lever.

How do I know what derailleur I need?

If you are replacing an existing derailleur on a bike, simply count the number of cogs on your cassette and you’re good to go. If your drivetrain’s speed is an unknown quantity, you can count the number of steps that your shifter runs through and add ‘one’ to determine the number of gears your drivetrain has.

Which pulley is which on rear derailleur?

Rear derailleurs use a cage fitted with two pulleys. The lower pulley pulls backwards to give tension to the lower section of chain. It is called the tension pulley, or ‘T’ pulley for short. The upper pulley guides the chain to the sprockets.