Question about Giant Boulder Se Mountain Bike 19" Aluminum Frame

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Pedal crank loose - Giant Boulder Se Mountain Bike 19" Aluminum Frame

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What screw do I need for the crank arm because it keeps popping a loose when I pedal on it for too long or too fast

It is no good buying a bolt from Home Depot. You need to visit a bike shop. The bolt is wedge shaped, the tighter you turn it the more it locks the crank to the shaft.

Nov 14, 2015 | Mongoose Cycling

1 Answer

Next power climber

The bottom bracket on a bicycle connects the cranks (arms that the pedals are connected to) to the bicycle and allows the cranks to rotate freely.
It looks like this is worn out or broken. Any bike repair shop will replace it. Shouldn't cost much.

Jul 09, 2013 | Cycling

1 Answer


Now you have me all sorts of could holding the gas pedal to floor make an engine crank...especially if the problem is a loose battery terminal? Never mind, don't respond to that....I'm not sure I will be able to handle the answer to that one!

Jun 08, 2012 | 1995 Honda Civic

1 Answer

Cog for chain seems to be grinding.It has something to do with the tighness of the petals. It seems maybe an outer nut is missing ??

Do you mean 'looseness"? Tight is usually good when we're talking about parts that we don't want to just fall off.

The pedals or the cranks?

Web search "loose cranks on bicycle" or "loose pedals on bicycle" to get a better handle on the problem, then follow the links for solutions and procedures.

Othere questions, properly crafted, will find answers through simple search engines.

Aug 09, 2011 | Cycling

1 Answer

Left pedal broke can i get replacement?

All depends on if you stripped the crank arm, you may have to replace your crank arm if you rode with a loose pedal. Pedals are sold in pairs, and there are 2 sizes, a one piece crank is 1/2" and 3 piece crank is 9/16", take your bike to the bike shop and they will tell you if you need a new crank arm or not. It will do no good to just replace your pedal if there is a bad crank arm thread, it will not hold.

Sep 26, 2010 | Cycling

1 Answer

Front crank sprocket clicking on bycycle, when I pedal the front crank sprocket clicks, it isn't the pedals.

make sure all sprocket bolts are tight.
check chain to make sure you have all rollers between links are there.this can make a clicking noise or skip teeth if one is missing when you pedal.
if you feel clicking in the pedals (even if you think it isnt the pedals),then it could be your bottom bracket bearing gone.
put one pedal towards the floor and stand on it.did it click?then try the other pedal.if you got it to click then your bottom bracket is loose

Sep 13, 2010 | Cycling

1 Answer

My Schwinn High Timber has developed a thump when I pedal under load. The thump occurs when either pedal gets to the bottom. When coasting or pedaling not under load, there is no thump. There is no thump...

Sounds like one or both of the crank arms are loose. The crank arms are the aluminum bars about 10 inches long that the pedals are attached to. They are attached to the bottom bracket spindle by way of a square hole that is tapered so as to fit tightly as the nut on the end of the spindle is tightened. You can test this by trying to move the two crank arms in opposing directions. To tighten, you probably have to remove a dust cap to get at the nut. But if you don't have a wrench to fit, this is a 1 minute fix that any bike shop would probably do for you for free. To see this, Google images for --- bottom bracket crank arms --- good luck vote if you found this helpful Al K

Sep 10, 2010 | Cycling

1 Answer

My bike pedals and crank are loose

Just oil it tightent it with tools. The bolt carring the bike pedals and crank are to be tighten or replaced.

Jun 01, 2010 | Cycling

1 Answer

How to remove a 1994 magna road warrior crank????

hello you need a crank extractor when you get 1 take plastic cover off the pedal you should see a nut this hold the pedal on take it off then with your crank extractor screw the first part on then screw the second part start to turn you should see the pedal start coming off do this on both sides once of there should be a ring with notch in it take this off you will see bearing case beware there might be bearing loose .replace bearing cases make sure you use plenty of greese good luck


Aug 06, 2009 | Dynacraft Cycling

1 Answer

I have an stationary bike, the left pedal keep getting loose i tighten it but it get loose anyway

Check to see if the threads (spiral edges) on the pedal stud or the crank arm is worn down. If they are, then you will need to replace one or both.

Hope this helps.

Jun 29, 2009 | Cycling

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