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

learn more… | top users | synonyms

4
votes
1answer
416 views

Seatpost of a folding bike is always dirty, filed down by frame?

I fold and unfold my Dahon Speed D7 at least four times a day, and each time its seatpost is being pulled up or pushed down the frame tube. Problem is that the seatpost becomes dirty really quickly ...
13
votes
9answers
7k 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 ...
2
votes
4answers
8k views

How to remove completely stuck saddle post from frame [duplicate]

I am helping a friend fix his bike that he got for free. Everything went well, except that I cant raise the saddle. The seatpost is really stuck in the frame. The clamp was easily removed. When I ...
2
votes
3answers
2k 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) ...
0
votes
1answer
150 views

Quick-release seat slipping down [duplicate]

My bike's quick release seat has been slipping down recently. I noticed when my (pro) biker friend remarked how low down the seat on my bike was, and helpfully readjusted it for me. Biking became ...
2
votes
1answer
2k views

How to pull a carbon seatpost out of a carbon frame?

How do I pull out a carbon seatpost on a carbon frame? It seems so hard for me... Do I need a special tool, or just ask help from a local bike shop? done with the seatpost. I made the frame and ...
2
votes
2answers
777 views

Bicycle Seating Posture Ergonomics

Road bikes have a forward bent seating posture, mountain bikes have a straight seating posture. I was wondering which of the above seating postures (of road bikes or mountain bike) is better for ...
1
vote
1answer
481 views

Problem during installation of Rockshox Reverb Stealth product

I am following the SRAM official procedure on a very similar bike to the one reviewed. However, I am stuck at this part: unthread the hose from the remote's barb. I just can't. I am holding the hose ...
3
votes
1answer
801 views

Riding bicycle without using seat

I've almost always rode on a BMX, so I've never been sitting while riding because of how low the seat is.Now I've had a chance to try out a more normal bike but I found sitting on the seat to be very ...
12
votes
3answers
1k views

Why do some triathlon seatposts go straight up and down instead of at an angle?

Why is it that some triathlon bikes have a seat post that adjusts straight up and down instead of the more standard axis that aims at the bottom bracket? This means that if you raise (or lower) the ...
0
votes
1answer
72 views

Dropper seat post with 150 mm of travel

Are there dropper seat posts with 150 mm of travel on the market other than Rock Shox Reverb Stealth and Kind Shock (LEV & Supernatural)?
5
votes
2answers
9k 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?
4
votes
1answer
908 views

Can i stop my frame scratching my seatpost?

I have an On-One Scandal aluminium frame, into which i have put a carbon seatpost. I have been adjusting it to find the right height, and i have noticed that it is getting seriously scratched - see a ...
3
votes
3answers
5k views

How can I use a bent seatpost to move my cruiser's seat farther back?

I realize this isn't everyone's taste, but indulge me for a moment... I just bought a beater cruiser bike on craigslist, and I'm trying to move the seat farther towards the rear of the bike for a ...
2
votes
2answers
1k views

Folding Bike Seat Post Replacement

I have a folding bike (basically this Origin8 model) and the seat/seat post got stolen. I haven't replaced a seat post before, but this is the only replacement post I could find, and I'm not sure ...
6
votes
4answers
3k 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 ...
9
votes
4answers
39k 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 ...
1
vote
1answer
106 views

Where can I find a replacement part for a seatpost collar?

I have a foldable bike and I need to constantly adjust the height of my bike seat, the problem is that one of the pieces of the seatpost collar is totally worn out and needs replacement. The part ...
2
votes
1answer
327 views

Seat clamp tolerance

Manufacturer specifies a seat clamp/collar size of 36.6mm. I was wondering if a 36.4mm clamp will work? How much tolerance is there with a seat clamp?
3
votes
1answer
4k views

How to calculate bike stand-over height using frameset geometry and wheel radius?

While it's best to buy through fitting a bike in store, it's not always possible (discussed here). On some websites, the stand-over height of a bike may not be listed as part of the specifications. ...
10
votes
2answers
2k views

Is a seat post with an integrated pump a good idea?

I saw this http://www.premiumbikegear.com/biologic/convenience/postpump-seatpost.html and thought it seemed like a cool idea. But if it was really such a great idea, I would have expected to see more ...
6
votes
3answers
5k views

What are the benefits of a carbon seatpost?

As the title states, what are the benefits of a carbon seatpost like this one from MEC? My research indicates there may be the following pros and cons: Pros Lighter Supposedly smoother ride Cons ...
4
votes
2answers
425 views

Seatpost maintenance : removing rust

I have an aluminum seat post in a steel frame. The post was really hard to extract and I don't want this thing corroding on me. You've discussed how to take care of the rust on a steel frame and on ...
2
votes
2answers
628 views

Joe Breeze HiteRite altenative… ideas before I get hacking!

I think the old HiteRite seat dropper springs are excellent for cost and simplicity, but of course they are like hen's teeth now. I've been looking at torsion spring suppliers and adapting seat ...
1
vote
1answer
211 views

What is the stem/seatpost thing on the Bicymple?

Anybody know if that's a pre-existing part that's been repurposed or if it's something that they've had custom fabricated? There are more pictures on their kickstarter page.
0
votes
2answers
639 views

Extending integrated carbon seat tube

Can I just cut the carbon seat tube, cut a vertical slot for compression and use a conventional seat clamp to hold a seat post in it?
2
votes
2answers
253 views

What Seatpost Is This?

I saw a picture of a seatpost that I'd like to buy but cannot find after much browsing. Unfortunately I no longer have a photo but have this information about it. Can someone identify it? Black. Not ...
1
vote
3answers
616 views

What is the diameter of the seat post on Citizen folding bikes?

I have searched and cannot find the diameter of the seat post. I would like to get their Miami or Gotham model, but I know I'll need a seat extension as a 6'2" rider. Dahon and others make longer ...
1
vote
1answer
699 views

Anyone make a 31 or 31.1 mm seatpost?

Some time ago, I bought a used Giant full suspension MTB. The guy cut the original seatpost too short for me, so I needed a new one. The post was some weird size, either 31 or 31.1 mm. Closest I ...
0
votes
1answer
1k views

How to avoid or reduce back-pain by adjusting the handlebar and seat of 19.5" MTB?

I'm 6' 3" long, having 45 inches of waist-Toe length. I bought Trek 3500, 19.5" sized frame bicycle two months ago. I've been experimenting with the handlebar and seat positions(Forward n Backward) to ...
4
votes
5answers
3k views

Why did the bike shop put grease on my seatpost?

When I bought a new bike my LBS put grease on the part of the seatpost that inserts into the frame. Why is this? Surely it can't seize?
1
vote
2answers
13k views

How do I install a bike seat clamp properly?

I recently moved, and had to take off the seat to my bike while I moved. I was surprised to find when I arrived and settled that I couldn't find the clamp to my bike seat. I managed to find a new bike ...
4
votes
4answers
1k views

Safe child seat attachment

I was told by my bike shop that the bike I have can only mount a child seat at the seatpost. My son is 2 and I need a safe child seat for him. I have been having great difficulty finding one that ...
3
votes
1answer
1k views

Remote rising seat posts and heavier rider

I am looking at remote adjustable seat posts that I can adjust the height of using a lever on my handle bar. They have a high price tag. Examples are Rock Shox Reverb Seat Post and Crank Brothers ...
5
votes
4answers
5k views

Does seat post suspension reduce efficiency?

I have a hybrid bike with front and seat post suspension. It's easy to see how front suspension reduces pedaling efficiency by using some of the power for compressing the shocks, so I keep it locked ...
2
votes
1answer
686 views

Seatpost won't let me set my saddle “level”

I recently changed my saddle and I've found I'm unable to get my new saddle level (as measured with spirit level). The problem is the seatpost clamp - it has teeth on both the concave top of the ...
3
votes
3answers
2k views

Can I use normal grease for a car on the surface of carbon bike?

Helo Guys, I want to know your experience about carbon material and grease Can I use normal grease with carbon ? I want to put grease onto fork and stem.... Or WD-40 or silicone penetrant would be ...
1
vote
2answers
430 views

Carbon seatpost dip in?

Can I insert a carbon seatpost up to 20cm deep into seat tube? The seattube is carbon as well. Total length of the seatpost is 35cm. The shape of the seatpost is aero seatpost (tear drop shape). It's ...
3
votes
2answers
1k views

Repair superficial damage to a carbon frame

I have a carbon frame with an integrated seatpost. The saddle sits on a clamp that is meant to secure the saddle on the seatpost and NOT hold the weight of the rider too. I went on a ride and my knees ...
9
votes
2answers
12k 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 ...
6
votes
3answers
6k 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 ...
16
votes
4answers
11k 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?
13
votes
3answers
8k 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 ...