Hiya neucleus vibe cycle, the front cog where the pedals are has come very loose i can see the barrins inside the cog i just want to know how to fix it ?

Single speed bikes are often known as Fixed gear or fixie bikes.
But Most people don't know the difference between a fixie and a single speed bike.
It's all in the hub
Mechanically, the difference is so small that you might not spot it even when you are looking for it. It all comes down to the rear hub and how the single cog is connected to the rest of the drivetrain. Single speeds are fitted with a freewheel cog that rotates freely one way but locks up the other. This means that the cog will turn the rear wheel when you pump those pedals, but then freewheel when the rear wheel starts turning faster than the cog - much like a geared bike.

When it comes to Fixies, it has no mechanism on the hub. The cog is fixed into the hub. If the rear wheel turns, the cog turns, and if the cog turns, the pedals turn with that. I admit the difference is not so small, but one that has a huge effect on how a bike rides and requires some consideration before you decide on a bike.
If you want to know more about Single speed and fixed gear bike
Have look on this
Gear bike review Blog.


Best Fixed Gear Bikes In 2018 Enjoy Your Ride On Cool Fixie Bikes

Could anyone please help? I have been given these 2 kettcar tornado air go karts one working one not .. needs a front drive cog and the pedal sheared off... Can it be fixed?? Where do I go for spare parts TIA ??

Put the chain to the inside of the front cog wheel, beside the pedals, first but not onto it, so you have plenty of room for pulling the chain to the rear. Fit the wheel back into place and before tightening it pull down the spring loaded arm, with the small cog wheel beside the back wheel. This takes the tension off the chain and allows you to put it into place on the back wheel. Tighten up the wheel. When it's tightened fit the chain onto the top of the front cog wheel. Lift the back wheel off the ground and turn the pedals forward. The chain will click onto the front cog wheel when you have turned the pedals one complete turn.

If you need to see a picture of how it should look at the back you can see one at http://orangecounty.craigslist.org/bik/2409696114.html

Bicycles have two sets of gears (front and back). The 6 position control slides the chain between the 6 sprockets (cogs) on the back. The 3 gears are for the front set of cogs. Between the two sets of sprockets, you get 18 (theoretical) different rates of chain movement per turn of the pedals. In fact some of the settings overlap. (However some of these should not be used. Do not use the settings that pull the chain to the furthest inside of one derailleur and the furthest outside of the other. This diagonal between the biggest and biggest sprockets (or smallest to smallest) puts extra strain on the chain.) The back derailleur is in the lowest gear when on the biggest sprocker. The front low gear is on the smallest cog. The highest gear possible is on the smallest rear cog and the largest front cog.

By planning the shifts in gears, you can maintain the same speed and cadence (rate of pedalling) on different terrains. (For going up a hill, use a lower gear than on flat terrain. However don't go to low or the bike may not balance well.) To shift through a large range of gears, you must be pedalling and then move the rear derailleur control followed by the front derailleur then the back again. (For faster shifts to a low speed, you can shift the front derailleur first but that can stress the system.)

For a guide to using the gears: http://www.southcoastbikes.co.uk/articles.asp?article=Gears .

I hope this helps.

Cindy Wells

Without a picture this is too difficult to diagnose properly. take it into your local bike shop, any competent mechanic should be able to spot the problem easily. Guessing from your description that the crankset (front cog) is too wide for your chainline and needs to be respaced, but can't give the solution without knowing what is causing the spacing issue.

I have straightened a large cog with a big screw driver, putting it through the outer part and levering against the inside. The metal of the cog bends quite easily and you need to work carefully, checking and correcting from the appropriate side as you go along. Your friends can stand and marvel at your brilliance, you don't need their help.

There's a trick to putting a chain back on a bike. First fit it onto the back wheel. Then hold it on the top of the front cog wheel (at the pedals) Get someone to lift the back of the bike so the wheel is off the ground. While the wheel is off the ground and you're holding the chain on the top of the front cog wheel turn the pedals forward, with your other hand, as when you're cycling and as it turns the chain will go on.

If you don't have someone to hold the back wheel up off the ground you could hold the chain on the bottom of the front cog wheel and turn the pedal backwards. The chain will still go on.

shift onto your smallest cog on the rear and shift to your biggest cog at the front then place part of the chain onto the small cog at the back and then do the same with the big cog at the front then simply pedal forwards and the chain should go back on by itself

You will have to remove the rear wheel and take it in to a bicycle shop and have the rear cog replaced. The freewheel part inside it has likely broken and will only rotate in both directions. It should rotate to back pedal and then catch as you pedal forward.

dealer told me it was the door hinge coming loose inside the door -- it would now hit against the window when you lowered it. it also made a loud noise when you opened the door. dealer wanted $205 to replace it, or $85 labor if i supplied the part