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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2
votes
1answer
65 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 ...
1
vote
0answers
32 views

Replacement seatpost clamp for Saturae seatpost

I have destroyed the clamp that connects the seatpost with the saddle on my Mekk. The seatpost is Saturae. Can someone tell me what type of clamp i need and where I can get it? Its a one bolt seat ...
3
votes
3answers
1k views

DIY: what material to use as DIY shim seat post?

Seat tube shim adapters are quite expensive, what kind of material do you recommend as a shim? I have seen in a thread some guys talking about home made shim: paper tape alloy drink can as a shim (...
2
votes
1answer
541 views

How can I mount a 25.4 mm seat-post on a frame that needs a 27.2 mm seat-post

My bike has no rear suspension. So I thought of putting a suspension seat-post on it. Unfortunately the only suspension post available in my city is a 25.4 mm one. I have added some scrap metal to fix ...
8
votes
4answers
3k 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 ...
3
votes
3answers
579 views

Remote drop seatpost cable route

What are some options for a seatpost remote cables on frames without a pre designed route? I'm considering a dropper post but would only do this if I was able to mount a remote as I like the ...
4
votes
2answers
160 views

Is it possible to increase maximum seatpost insertion length by filing down a seat tube bottle cage mount boss?

I have an aluminum MTB hardtail frame with a pair of standard bottle cage holes on the seat tube. I want to insert a seatpost fairly deep into the frame sometimes, so that the saddle stays low. The ...
0
votes
1answer
45 views

Seat post size on Schwinn Loop

The seat post (and the saddle) got stolen on my Schwinn Loop. I've searched everywhere but I haven't been able to find the diameter/size of the seat post so I can look for a replacement online. Any ...
2
votes
2answers
992 views

Removing old fashioned saddle from seatpost

I've been searching for instructions on how to remove my old saddle from my seatpost. All the videos/guides I've seen have been about the newer kind of clamping mechanism where just one bolt needs to ...
6
votes
1answer
245 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 ...
3
votes
1answer
70 views

1970 Schwinn Tandem - How to move rear seat further away from handlebars

I scored a cool sierra brown, 1970 Schwinn Tandem 5 speed bike on craigslist (one owner even). I grew up in the 70s and loved the look of this bike, but I guess I had to turn 45 before I got one. So ...
2
votes
3answers
430 views

How come my bike has such a short seat post?

The bike is a 1983 Dawes Galaxy and upon trying the raise the saddle this morning, I found this stubby little thing. Is this normal for bikes of this age? In either case, why so short?
6
votes
2answers
193 views

Should I worry about rain getting inside my frame?

I commute to work every day and lock my bike on the street. I have a nice saddle so I remove my seat post and take it into work with me. This obviously leaves a hole open to the inside of the ...
10
votes
5answers
923 views

Is there more than one ideal seat post height based on type of riding?

Assuming one has the correct frame size for one's height, can there be more than one perfect seat post height for the type of riding? I usually ride only in the city with traffic and less than 3 miles ...
1
vote
2answers
178 views

Seat post tightening

I have a Giant Defy 3 and I'm not sure how tight the seat post bolts should be. I don't have a torque Allen key. Is doing the two bolts on the ring that goes around the frame as tight as I can do them ...
5
votes
3answers
174 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 ...
3
votes
1answer
197 views

Specialized Allez - Upgrade to Carbon Seatpost for Long Distance Comfort?

A bit of background: I've been riding a stock 2012 Specialized Allez since I bought it (in 2012). I am a larger guy (105 kg), and tend to go for rides in the 50-100+ km range. No matter what I wear ...
1
vote
4answers
255 views

Seatpost clamp bolt replacement

I rounded the flats on the seatpost clamp bolt (it's an Allen bolt; i.e. I turn it with a Allen key) that came with my bike (2014 Fuji Absolute). I found a replacement for the bolt at a local hardware ...
11
votes
3answers
14k views

Benefits and drawbacks of Dropper posts?

From what I've seen, the last couple of years saw a new product type come into light, and since its inception it has started to appear on bikes (such as this one, this one, or this one) as a stock ...
3
votes
3answers
3k views

Tight Seatpost Installation

I'm having a bit of a problem installing my seatpost. I have a 31.6mm carbon-wrapped aluminum seatpost which fit perfectly fine in my previous aluminum frame. Unfortunately, that frame cracked, ...
2
votes
3answers
444 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 ...
3
votes
2answers
315 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 ...
3
votes
1answer
142 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 ...
-2
votes
5answers
351 views

Rear Lights for Aero Seat post? [closed]

I went to the Bike store looking for rear lights for my Aero seat post and for the life of me I couldn't find that fit. Its very skinny in the back and so the regular tail lights do not fit. How ...
1
vote
1answer
73 views

should I change my seatpost?

I have a seatpost with spring suspension. Something like this one: A friend of mine hit it with his leg while he was dismounting and broke it into two pieces. After putting it back, I noticed that ...
2
votes
3answers
129 views

Required 26.8mm diameter Seat Post

I have a Schwinn Searcher Sport 2011 Hybrid Bike, with a damaged seat post. Thus, I require a 26.8mm seat post with suspension. In India, I have searched, but I am not able to find a suitable seat ...
1
vote
1answer
325 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 ...
4
votes
3answers
141 views

Daily Adjusted Seatpost for Trainer Bike

I just got Nashbar's Ascent Fluid trainer and put an old big-box store bike on it that nobody was using, so now I've got kind of a permanent trainer bike which is nice. The problem: me and my partner ...
17
votes
5answers
13k views

How do I keep my seat from tilting back?

When I first got this bike, I got the saddle adjusted almost perfectly. Recently it slipped back (so that the nose sticks up). I loosened the bolt under the saddle, tilted the saddle back into the ...
5
votes
6answers
6k 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 ...
2
votes
5answers
273 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 ...
6
votes
6answers
10k 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 ...
4
votes
2answers
6k 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 ...
1
vote
2answers
219 views

Giant Road Bicycle, Comfortable Seat

Anyone know of a comfortable seat that is compatible with Giant Bikes? I took my seatpost to walmart to try and fit the seatpost with the bell gel seatpost with shock absorbers, Had high hopes for ...
0
votes
0answers
89 views

I have a few questions about frame repair, seat adjustments, and rims.

My bike is a Trek 1100 Aluminum Frame My bike has a few dings and scratched in the frame, and I want to get rid of them. So I was thinking I could get a powder coat or something to get a new paint ...
2
votes
1answer
182 views

Carbon-wrapped Aluminum seatpost?

I have the seatpost shown in the pictures below. It came on a 2010 Specialized Tricross. It looks like Carbon fibre on the outside, but when you look at the open end of the tubing, it actually looks ...
13
votes
5answers
27k 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 ...
3
votes
1answer
72 views

Peugeot rear brake location

I have a 1985 Peugeot P16 (mixte). The Weinmann 730 sidepull rear brake was located at the seatstay bridge. Q: Is it safe to relocate it to the gusset plate located behind the seat tube and attached ...
6
votes
1answer
1k views

Trading out folding bike seat post

I currently have an older Dahon Mariner with a Telescope seat post. The third wheel that functions as the "third leg" (when the bike is folded) has broken off. To compensate, could I switch out the ...
0
votes
1answer
251 views

Does a carbon frame need two-bolt seat clamp?

Does a bike with an alloy seat post and a carbon frame need a seat post clamp with two bolts? Most clamps these days seem to be either quick release or single bolt. Is that safe to use with my set up? ...
0
votes
2answers
131 views

How to work around a high seatpost?

So I bought this old bike but realized that its seatpost is stuck and high. When I ride I feel uncomfortable because it's slightly too high for me. Also I realized that it's really difficult to fix ...
2
votes
1answer
249 views

What does this rod inside the my american classic seat post do?

I've got an american classic seatpost. I bought it used, and wasn't sure how to properly adjust it initially. I found the bolt on the bottom clamps the seat down. The bolt on the rear underside ...
4
votes
3answers
257 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 ...
0
votes
1answer
53 views

I am hauling my bike a couple of thousand miles [closed]

Without the seat and post in. Any suggestions what to plug the tube with?
7
votes
3answers
2k views

Does anyone make a split seat clamp?

I built an 'Urban Mountain Bike' and I sometimes like to take it off drops. Accordingly, I cut the 'nub' that sticks up above the top tube so that the seat can be removed without a scary open pipe ...
3
votes
3answers
456 views

Suspension seat post is loose

Is it ok that a suspension seat post like the one shown below (source: cyclande.com) is actually a bit loose (moves a bit left-right and probably also up-down). The vendor told that for such seats ...
0
votes
1answer
146 views

Will slightly slimmer seatpost make a difference?

I have an old Peugout bike that needs a 23.8 (to the best of my measuring abilities) seat post. I can't find such a seatpost in all the obvious shopping places, but I did find a 23.4mm one. I'm just ...
0
votes
1answer
501 views

Help me buy a bike seat post

I know that my bike has a 25.4 mm diameter seat post. So can I purchase any old 25.4 mm diameter seat post from eBay and expect it work with my existing bike seat? Here are some pictures of my ...
5
votes
4answers
8k views

Getting the right cockpit position. Sliding forward. What should I adjust to keep my sit bones on the seat?

I am experienced rider and I'm looking for some advice on how to adjust my cockpit position. I am a daily commuter, and do regular 40-50k rides on the weekends, and with the warmer weather will work ...
1
vote
2answers
365 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 ...