3 Things NOT To Grease On Your Bicycle! Grease vs Lube...

Lube, grease and degreaser for your bike:

[marcoangelo]

1 - chain
2 - Seat Post
3- Brake rotors

You're welcome.

[Tombrosapien]

Protip: Grease your eyeballs so there’s no friction when you blink.

[balesmachine]

I guess the author hasn't heard of galvanic corrosion. If you have an aluminum seat post and a steel frame, you must put grease the seat post, or those two components will eventually be one permanently. I used to paint bicycle frames the only way to remove the seat post was to drill them out with a very large drill. Grease in this instance will prevent galvanic corrosion with steel frames and aluminum seat posts.

[bradwjensen]

Always grease your seatpost. If you have a carbon bike or seat post then you need to use special carbon paste. If you don't, you're going to have problems with your seat basically getting "welded" to the frame. I've always greased my seat posts and have never had an issue with the seat slipping.

[dylan]

You absolutely need to put grease where the seat post goes into the seat tube if you don't your seat post will seeze into your frame. This happened to a good friend of mine and he had to destroy the seat post to get it out of the frame. Assembly compound is only needed in situations where there is carbon fiber involved and it is a grease that has grit in it to keep the carbon part from slipping

[Guoenyi]

I do grease on my alu post in a alu frame. Clamp done up with torque wrench properly. Doesn't slip at all.

[neilfroggycrompton]

on steel framed bikes a very thin layer of grease will help prevent the seat post from seizing into the frame, same with aluminium bar stems in steel forks (galvanic corrosion)

[fredlast]

What you should do is fit your seat post at the height it suits you, then remove the post and lightly grease the post below the point where it clamps. Otherwise it becomes welded to the frame over time. My winter bike has a stuck seat post because I didn't grease it.

[reinermiteibidde]

I know a guy who put oil on his disc brakes to fix them and to stop them squealing. He was not very happy with the result and asked me for help: He told me that the guy at the bike shop would have advised to put mineral oil on the brakes (probably meant bleeding them). So he went ahead and placed his pads and rotors in an oil-bath.

I had a good laugh out of it because his brakes kept squealing and smelling of oil for months.

[danferguson]

As a mechanic, PLEASE GREASE YOUR SEATPOST! I don't want to be the one to tell you that your seat post has fused to your tube and it'll cost you an arm and a leg to get it out.
Also - check for your seat post / frame combination. Carbon needs special paste, not grease.

[Demon-_-]

hmm grease on a seat post does help from getting stuck posts and carbon paste for carbon seatpost. without it on a carbon post in a alloy or other metal frames you can get galvonic corrosion. I have also never had a problem with a light coat of grease on a metal post in a metal frame causing it slip. but I have seen plenty of stuck posts that had no grease

[shmu_el]

I suppose you've never encountered a seized seat tube... when you do you'll wish there was a bit greace in there. In bike shops the mechanics prepare the bike for the worst case scenario and do not want the bike to come back five years later with a seat tube that's welded inside the frame.

[basebilljr]

I strongly disagree with not putting grease on the seat post it's very common for a seat post to freeze up into the frame sometimes even welding it's self to the frame with certain materials due to a chemical reaction.i have worked at a bike shop for more then a decade and it's insane the number of people that destroyed a seat post or even worse their frame because of it

[dankitching]

Anyone watching these videos should really take his "facts" with a grain of salt. Essentially the seatpost bit is correct, but if you have a steel framed bike you BETTER put grease in there or you will likely never be able to remove the seatpost again without resorting to extreme measures.
Just like in the video where he has his carbon road bike clamped into the workstand by the toptube, SickBiker has some useful tips but displays a shocking lack of knowledge for someone who has taken it upon himself to give cycling advice on Youtube.

[killerlt]

Only reason they used grease in a seat tube was to prevent the seat post from rusting in place on a steel frame and steal seat tube. Also with steel frames and aluminum seat posts, moisture can literally weld the aluminum to the steel. So always grease steel seat tubes. You don't need a heavy bearing grease, just an assembly or lithium grease would work. Carbon and titanium products are very different stories.

[niklasp]

As a mechanic i can tell that you can't say that that grease in general is bad for the clamping of your seat post. It depends on what seatpost you are using with wich frame. Just look it up in the manufactures manual to be sure. Some will seatposts will slip down but some just need cabonpaste or normal grease so not seize to the frame in no time.

[vojtechletko]

Always grease your seat post, unless it is carbon seat post or folding bike (Brompton or so). I've seen many of seized seat posts, we were removing seized seat post with 2 other mechanics, while two of us were twisting with the whole bike with seat post in a vice and the third one was using a heat gun to expand the steel frame. Trust me, you don't want to deal with seized seat posts.

The right process how to install seat post is to clean the seat tube (inside of the frame) with some sort of rotating brush, rug, or even check it with a finger for pieces of sand or metal (you don't want to have scratches on your especially black seat post). You can file or sandpaper some sharp edges from inside of the frame seat tube.
Then apply a thin layer of grease around 2-3 inches deep inside of the frame. Install the seat post, tight down the bolt or quick release on the seat collar - make it tight and you won't notice any sliding or movement at all. I've never seen cracked steel or aluminum frame or seat post from overtightening it. Yes, some people using wrong diameters of seat post which does not fit the seat tube in a frame or even wrong size of seat post collar. But if everything is installed correctly, grease won't make the seat post slide.

With carbon seat posts it's different story, definitely use adhesive paste instead of grease. Seat post collar has to be tightened with torque wrench only on accurate Nm. I've seen carbon seat posts cracked because of overtightening them. Never grease carbon seat posts and use some adhesive stuff.

The only bikes where is no grease or adhesive needed are folding bikes.

[nenadmojsovski]

Im greasing my seat post and no it wont slide down, that clamp has enough power to hold a car and not moving from the frame :)
It's a bad advice not to grease the seatpost .

[gblan]

Chain, seat post/tube, brake rotor/pads....you're welcome.

[cupsbo]

Greasing my seatpost and seattube solved my annoying creaking problem.