Hello all, new to the forum, first post.
So i’ve got a cup and bearing BB, and i just cleaned scrubbed and repacked it, and the cranks are solid, maybe a liiiiiiitle bit of play, but i am getting a click every time the right pedal gets to about 15 degrees past forward. it only happens when i am applying pressure, not when i am just rolling. there is also some weird vibration in the drive.
i tried re-centering the chain ring, and it seems true still, any ideas/suggestions?
Is it a conversion?
If your chainline is off it might click some, also when my chains get in rough enough condition they start to click until I clean and lube em, it could also be a stretched chain, your pedals, an out of true back wheel…I would start with cleaning the chain, and when you pull it off measure how much it has stretched. Then check the true of your back wheel, since its a newly occuring problem I’m guessing you have a decent chainline, so check the true of your back wheel. If none of those is it, pull off your pedals and try a different set and see if it changes.
My first thought was loose chainring bolts, but if you re-centered then you tightened 'em.
It may not be the drive train. Saddle may be loose (and only moves when put pressure on it just so). May also be a pedal.
My saddle clicks and I thought it was the drivetrain at first. Little grease on the rails fixed that.
yeah, check the pedal bearings (if you can).
also, are you sure you put the bearings in correctly when you put the BB back together?
[quote=“jim”]yeah, check the pedal bearings (if you can).
also, are you sure you put the bearings in correctly when you put the BB back together?[/quote]
yeah, i am going to do that next. one of the pedals is missing the cap so i really need to clean out the bearings in that one. i am 99.9% sure i put the BB back together correctly, so i am thinking pedal issues might be it, or at least my next try at a fix.
thanks
[quote=“frankstoneline”]Is it a conversion?
If your chainline is off it might click some, also when my chains get in rough enough condition they start to click until I clean and lube em, it could also be a stretched chain, your pedals, an out of true back wheel…I would start with cleaning the chain, and when you pull it off measure how much it has stretched. Then check the true of your back wheel, since its a newly occuring problem I’m guessing you have a decent chainline, so check the true of your back wheel. If none of those is it, pull off your pedals and try a different set and see if it changes.[/quote]
yeah, it is, but my chainline is almost perfect straight. the chain is relatively new, and i just lubed it recently. how do you measure how much it has stretched? the back wheel is pretty true, but i’ll check it. i feel like maybe the chain ring is bent?? it looks straight though. i may just take it off and see if it is flat.
[quote=“pascal”][quote=“frankstoneline”]Is it a conversion?
If your chainline is off it might click some, also when my chains get in rough enough condition they start to click until I clean and lube em, it could also be a stretched chain, your pedals, an out of true back wheel…I would start with cleaning the chain, and when you pull it off measure how much it has stretched. Then check the true of your back wheel, since its a newly occuring problem I’m guessing you have a decent chainline, so check the true of your back wheel. If none of those is it, pull off your pedals and try a different set and see if it changes.[/quote]
yeah, it is, but my chainline is almost perfect straight. the chain is relatively new, and i just lubed it recently. how do you measure how much it has stretched? the back wheel is pretty true, but i’ll check it. i feel like maybe the chain ring is bent?? it looks straight though. i may just take it off and see if it is flat.[/quote]
count how many links are in it and multiply by .5, then measure it in inches. The difference in the 2 numbers is how much it has stretched.
Whenever that’s happened to me (in that part of the stroke) it’s been because of that little bit of play in the BB . Take those cranks off and do it again!! Of course definitely check the chainring bolts and seatpost bolt first as they can also cause the same thing and are much easier fixes.
PS. I got that clicking last week on my bike and thought to myself “hmm, wonder if that’s the chainring bolts”. Then after another two miles: “I guess it’s the bottom bracket 'cos I can now wiggle it with my feet”. Then, after another 2 miles, I’m 50 feet from my house when the adjustable cup falls off. I have no idea how that can happen as English threading supposedly tightens itself as you pedal but anyway, there you go.
Then, after another 2 miles, I’m 50 feet from my house when the adjustable cup falls off. [/quote]
wow, sounds like you got pretty lucky, not being far from home.
i put a different chainring/crankarms on and it seems to have solved the clicking problem. the spacers on the old one were lock-washers, so idk if maybe that had something to do with the noise, but this new one is better because it is a bit bigger so i don’t spin out so bad when i get going. but nowmy chain is too short and i’m right on the end of my dropouts! haha. it never ends
My driveside crankarm won’t stay tight, no matter how hard I torque it down. The strange thing is that I’ve had the problem with 2 different BBs. Maybe I’ll just Locktite it…
sometimes it just takes a couple tightenings for the bolt to seat right. Mine kept coming loose for a while, but now its fine.
when i rode bmx, i had primo powerbite cranks and theyre aluminum with a square spindle. i remember creaking being normal and perfectly ok. so, is it not ok with our cranks even though its basically the same case?
I dont know if it’s ok, I just dont like loud bikes.
I dont know if it’s ok, I just dont like loud bikes.[/quote]
i dont like loud bikes either but it would give you at least some peace of mind that your bike is in perfect riding condition. my cranks have always creaked but after losing a crank bolt, i tightened them up really tight and then they creaked even more. ive loosened them up and tightened them and now im back to the same creaky cranks. so, maybe they were fine to begin with.
I dont know if it’s ok, I just dont like loud bikes.[/quote]
i dont like loud bikes either but it would give you at least some peace of mind that your bike is in perfect riding condition. my cranks have always creaked but after losing a crank bolt, i tightened them up really tight and then they creaked even more. ive loosened them up and tightened them and now im back to the same creaky cranks. so, maybe they were fine to begin with.[/quote]
did you grease up the arms and spindle before you put em in?
…no, not until reading this thread did i ever know you had to. i never did it when i rode bmx or knew anyone that did. problem solved, i guess. pedals are good and chainring is good so…
…no, not until reading this thread did i ever know you had to. i never did it when i rode bmx or knew anyone that did. problem solved, i guess. pedals are good and chainring is good so…[/quote]
yeah, you should slather a healthy helping of grease on the spindle and in the taper in the crank arm. It’s to keep them from getting damaged and help them seat properly. Its generally a good idea to grease up any part that comes in contact with another metal part, so stems, seatposts, cranks, bottom brackets, pedal threads etc.
I thought it is the opposite. I was under the impression that you shouldn’t grease the spindle at all.
same here.