Originally Posted by Armysoldier10
ok, what do you mean by "pedals may fail"? Like they will fall off? I'll go replace those ASAP. What about the fork will it make the same type of squeaking noise as the crank/bb/pedals/etc.? Can the fork be refurbished or do I need to buy new? If so can I replace the 80mm fork with a 100mm fork, I really like the feel of the one on my wifes bike, but didn't know if I could replace one with the other. I'm fairly new to working on this stuff myself so any help is appreciated.
The axle spindle that threads into the crank can fail and gives creaking noises prior to failure when pedalling. They spindle tends to break just outside the crank leaving a threaded stub of under an inch seperated from the rest of the pedal. The break is near perpendicular to the outside of the spindle giving you stub that is cylindrically but for the hex or whatever wrench shape was selected for removal/installation. After failure, you can see telltale discoloration of metal fatigue at the failure point. When that failure happens the threaded portion remains in the crank and the pedal goes down to the pavement. Since your wife has a bike, try one then the other of her pedals and see if that eliminates the creak. I'd start with whichever downstroke makes the louder noise as a more likely candidate. If replacing the left and right pedals doesn't solve it, then it probably wasn't the pedals and can look elsewhere and return your wives pedals to her bike before she files for divorce.
I'm 225 lbs and have been in the 235 lb vicinity most of this past year. The heavier the rider the more significant the risk of breaking these pedal axles. Bearings and platforms can also creak, but if you issolate the creaking problem to a particular pedal, I'd not risk it being the axle and replace the pedal.
The fork, stem, and handle bars can make make creaking noises too. The handlebars and handlebar-stem connection can be fairly easy to diagnose as you can twist them about the bike's roll axis (the axis the top tube is on) when the bike is stationary thereby eliminating the other sounds sources such as bottom bracket, cranks, pedals, frame, seatpost. If it's the headset, you should see some unnecessary play when you force it, I'd also expect you'd hear it under braking.
The seatpost and seat could be a source, but can be easily issolated if you try standing and find it's still there.
Never having had front fork failures, I'm not sure what to expect there.