i have a carrera kraken mountain bike and when i stand up on the pedals there is a loud creak.what could this be ???
there is no play in the pedals and all the collors are done up tight so i dont know what this is.if it is the bottom bracket then how do i replace it??
many thanks.barry

barry, October 2009

Bazza,
I bet it is your bottom bracket.Depending on age of bike probably does not need replacement,just adjustment and fresh grease.Different types of BBs will make creaking noise when either too tightly adjusted or too loose.

Lazza, November 2009

first thing-

check that your cranks are on tight. the crank arm is what the pedal is attached to. Where the crank enters the bike is called the bottom bracket and there is usually an 8mm hex nut there that may need tightening. Also, check the condition of your pedals by trying to lift them up and down "in place". There should be no movement. pedals are pretty cheep to replace and need replacement every few years.

dan, October 2009

the ballberings ring in the crank might have broken up , you need to open the bottom bracket on the adjuster side , after you have takeing off the peddel arms, get two new ballbering rings £2 each , grease the up well , put everything back , and test them out, now if your useing cycling shoes check the cleats, for movement ,

mick, October 2009