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Questions tagged [seatpost]

Questions referring to the part of a bike that extends upward from the seat tube on the frame to the saddle.

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14 votes
2 answers
16k views

How to adjust seat saddle and saddle position for knee pain?

I understand that a seat too high can cause: hips rocking trying to extend to pedals pain in the back of the knee And that a seat too low can cause: can't fully extend legs pain in front of the ...
mark's user avatar
  • 357
22 votes
5 answers
76k views

What makes grease appropriate for bikes?

I'd like to grease my seatpost, and in front of me I've got a tube of "CMD Extreme Pressure Lube #3" that claims to be good for "ball bearings, roller bearings, deep drawing, rivet spinning" and a ...
Thalecress's user avatar
19 votes
3 answers
36k views

Should I oil my seat post?

In a previous question I asked how to remove rust from my seat tube/post. In the comments of one answer somebody said I should be oiling my seat post to prevent it from rusting into my seat tube, but ...
user229044's user avatar
  • 3,606
8 votes
12 answers
28k views

Aluminum seatpost stuck to a steel frame

I'm trying to free my aluminum seatpost corroded to a CrMo frame. One of the methods is to heat the aluminum seatpost and then to let it cool. In theory, the aluminum will expand twice as fast as ...
Jacob's user avatar
  • 349
8 votes
7 answers
16k views

Problems with a slipping seatpost

I got a Cannondale Quick1 2010, with the seatpost made with aluminium carbon-wrapped. The problem is that the seatpost tends to slide downwards, even if I squeeze a lot the snap ring; if the ground ...
Sam Qasbah's user avatar
2 votes
2 answers
2k views

Will bending the seat post two inches forward cause any unforeseen structural issues?

My current bicycle is a 2013 Specialized Allez C2. I'm thinking of using a conduit bender to bend the angle of the seat post two inches forward. A conduit bender can bend one inch for every 3 inches ...
Machine Fuel's user avatar
16 votes
10 answers
14k views

Removing Seat Post rusted into downtube

I have an old steel frame (Columbus Number 2 I think) that has the seat post (Suntour Superbe Pro - see, I said it was old!) rusted in. I have tried lots of WD-40 but it will not budge. Any tips on ...
Anthony K's user avatar
  • 6,233
16 votes
6 answers
44k views

Should I grease a carbon fiber seat post?

I was reading a recent question when I saw this answer: You should absolutely grease your seatpost (unless it is carbon fiber). Why should I NOT grease a carbon fiber seat post?
Anthony K's user avatar
  • 6,233
15 votes
5 answers
87k views

Is it worth getting a suspension seat post as a cheap alternative to full suspension bike?

I'm planning a ride from Birmingham to London on the Grand Union Canal (UK), which will be quite bumpy for most of the 145 mile distance. I have a front suspension bike and can't afford a new full ...
Mick Sear's user avatar
  • 479
14 votes
8 answers
3k views

How to mark seatpost position?

Is there an effective, non-destructive way to mark the seatpost position? We share some bikes within the household, meaning that the saddle height is adjusted often. When I had an affordable Decathlon ...
Szabolcs's user avatar
  • 996
13 votes
4 answers
17k views

Metal seat post with carbon fiber frame?

Is using a metal seat post on a carbon fiber frame advisable or not? I want to use a seat post mounted rack on my road bike (no regular rack mount points are on this bike), but I have been told that ...
rsecca's user avatar
  • 373
13 votes
7 answers
18k views

Which way should a seat post clamp be oriented?

I heard somewhere (I don't remember where) once that a seat post clamp should be oriented with the gap at the front of the seat tube, opposite of the gap in the top of the seat tube. The logic behind ...
jimchristie's user avatar
  • 11.8k
9 votes
4 answers
7k views

How do I remove rust from my seat tube?

I just pulled my seat out as the first step of breaking my bike down for winter storage, and found that rust has formed between my seat tube and my seat post. The rust starts maybe 3" down the tube ...
user229044's user avatar
  • 3,606
3 votes
3 answers
4k views

Seatpost Overextension

I've been riding with my very short seat post extended well past its maximum extension line for quite a while now. Looking at the seat post itself I don't see any signs of deformation or damage other ...
Dissenter's user avatar
  • 300
1 vote
6 answers
6k views

How to remove a stuck seatpost?

I bought an old bike. However there is one problem with it. The seatpost is stuck and I can't take it up or down ... and it's too high for me that my back hurts. It seems that the old user made it ...
Jack Twain's user avatar
9 votes
2 answers
33k views

Is it possible to compensate a short sized frame by adjusting seatpost and stem?

Could you achieve the same position you would have on a bigger frame by raising seatpost and stem? And how could I adjust those to "simulate" a bigger sized frame?
Vital V's user avatar
  • 357
8 votes
1 answer
596 views

How to judge comfort when buying a new saddle

I bought a Motobecane Mirage S recently from bikesdirect.com I took the following advice from a bikes forum: Plan on changing the seat, pedals, and possibly the tires. The seat will make your ...
maxwell's user avatar
  • 283
6 votes
5 answers
39k views

What type of grease to prevent seat post sticking?

What type of grease should I buy specifically to prevent the seat post from getting stuck in the seat tube? I believe its aluminum. Is there all-purpose grease that I can use for other parts of the ...
Rosalie Molloy's user avatar
6 votes
2 answers
8k views

Is there a gadget that will let me slide my seat forward more than my post allows?

So I'm I'm trying to dial in the fit on my road bike to be more tri-bike like, and in doing so, I'd like to move my seat forward, well, more than I currently can. I have the Redshift seatpost, and I ...
CJ F's user avatar
  • 233
5 votes
3 answers
11k views

Slipping aluminium seatpost in aluminium frame

I've already seen this question: Problems with a slipping seatpost The main difference is that I have an aluminium frameset and a forged alloy seatpost - lightweight clamp. After every couple ...
RoKa's user avatar
  • 417
5 votes
5 answers
3k views

Are flip saddle posts available

When trying out the baby seat on my wife's e-bike, it was really easy to fit and remove because her saddle flips up to access the battery. It's a real pain threading the baby seat over the top of my ...
Chris H's user avatar
  • 59.7k
5 votes
2 answers
7k views

Adjusting saddle angle on a road bike (drop bars)

I'll preface this by saying that I've been a mountain biker for over a decade, including XC racing for a couple years. I've never had a hard time adjusting the saddle angle (tilt forward or back) on ...
rally25rs's user avatar
  • 1,251
4 votes
1 answer
999 views

Is it possible and safe to attach this type of seat to suspension seatpost?

I have a Merida Crossway 20 bike, and want to change its saddle. Now after buying a new one I am not sure it is even possible to mount it. I had forgotten I have a suspension seatpost, but the new ...
Gnudiff's user avatar
  • 195
4 votes
3 answers
3k views

Is it safe to use aluminium seatpost adapter (27.2mm to 31.6mm) for a carbon frame?

I have Cane Creek Thudbuster Seastpost (aluminium) 27.2mm x 400mm which i want to use for a bike with a carbon frame (31.6mm seat-tube). I'm thinking about getting a seatpost adapter/shim from 27.2mm ...
JBeurer's user avatar
  • 173
4 votes
1 answer
10k views

What's this torque specification on the seatpost for?

I read 12Nm torque on my seatpost (a Cinelli Vai seatpost). What does this torque refer to? I would assume it's for the two bolts above that tie the saddle rail to the seatpost, but at the same time ...
Alessandro Cosentino's user avatar
3 votes
5 answers
4k views

Child seat (or rack) at the seat post

I have 2 bikes (mountain and road) sometimes I use them in races (mostly MTB) so I don't want to have any fixed accessory on them. I'm looking for a child seat (or rack where a seat can be mounted) ...
Narcís Calvet's user avatar
3 votes
1 answer
7k views

How easy is it to remove a seat with a dropper post?

I recently got a shop to install a dropper post on my mountain bike and just now realized that I have to take the seat off in order to fit it on a car boot rack. Is it straight forward to take it off ...
Dr. Greenthumb's user avatar
3 votes
2 answers
11k views

What is the minimal seat post depth? [duplicate]

This may depend on the seat post and the fixture, but how deep should my seat post be into the frame? I have a bike that came with a post that is pretty long and I cut an inch off the bottom of the ...
James G.'s user avatar
  • 305
2 votes
1 answer
13k views

Oval carbon saddle rails compatibility

I have a new saddle and I want to buy a compatible seatpost. The saddle rails is CARBON 7x9 as specified by the manifacturer. I want to understand better the compatibility of this kind of oval rails. ...
Alessandro Cosentino's user avatar
2 votes
3 answers
483 views

Repair damage to my seatpost clamp?

I am not sure I have the right terms, but here goes. I stopped in a bike shop to look around. It specialized in racing bikes. I asked the owner about why my glutes were always hurting after a bike ...
fixit7's user avatar
  • 1,232
2 votes
0 answers
798 views

upgrade traditional saddle clamp (not seat tube clamp)?

I'm currently restoring my folding bike and it has a large diameter (34 mm/1.34 in) seatpost that tapers to the standard 22 mm/0.87 in diameter at the end. The bike currently uses that traditional ...
Gregory Leo's user avatar
  • 1,305
0 votes
3 answers
494 views

Brake hanger causing seatpost slippage?

I have an aluminum seatpost in a steel seat tube and I have been noticing some slippage lately. The size of the seatpost and of the seat collar match perfectly the size of the frame. I inspected the ...
Alessandro Cosentino's user avatar