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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4
votes
1answer
213 views

Skipping bolts on seatpost , please help?

Couple weeks back I bought this aluminium single-bolt seatpost . Now, just 20 days later, the nut that tightens the the mechanism to fasten the saddle rails to the seatpost is skipping around and not ...
9
votes
4answers
1k views

How to make old bike's seatpost slide smoothly when it needs adjustment again?

I've several old bikes with a common problem, the seatpost is a bit too much hard to slide just to adjust the height (sometimes the frame scratch the seatpost), which might be ok on a road bike, but ...
4
votes
2answers
429 views

How do I fix the comfort of my bike?

On a folding ebike with no suspension what’s the best addition to help with uneven roads bumpy surfaces etc? Whats the best/valued part I could add for comfort please?
0
votes
1answer
32 views

25.4-27.2mm seat post shim on a seat tube with 26.8mm inner diameter

From where I live (Philippines) , there seems to be no stock for 26.8mm seat posts. All other sizes are available except for 26.8mm; they don't even sell shims for that size. Currently I am forced to ...
5
votes
1answer
564 views

Bike seat tube is messed up

I was testing my seat and as I was sitting on the bike on the highest level of the seat post. My seat post came off and bent my seat post, so I ordered another, but now my seat tube doesn't allow my ...
7
votes
2answers
451 views

Before re-inserting a stuck seat post what should I do to the steel/alloy surfaces?

After several days and great effort I've succeeded in removing a stuck seat post (alloy post in a steel frame). It's actually in a reusable condition. Before trying to re-insert it, what should I do ...
0
votes
1answer
102 views

Seatpost clamp arrow and too wide saddle rails

I have two questions in one: :) The first would be what direction does this arrow on the seatpost's top clamp indicate? Is it towards the front or rear of the bike? Second would be what should I do if ...
5
votes
2answers
147 views

Seat post bolt sheared off - twice

I use a BMC TM02 on CycleOps Magnus. The seat bolt has sheared off twice while riding on the trainer. The seat is attached to the post by a single stainless steel bolt. KSFC 12.9 appears on the head ...
1
vote
0answers
33 views

Size of clamp for Fizik Vento Argo R1 saddle on Specialized CG-R seat post

I have a 2015 Specialized Roubaix SL4 Disc with a CG-R seatpost, and recently bought a Fizik Vento Argo R1 short-nose saddle for it. Knowing it has ovalised carbon rails and not the standard 7 mm ...
5
votes
2answers
1k views

Why the small difference between common sizes of handlebars (31.8mm) and MTB seatposts (31.6mm)?

Many handlebars have a 31.8mm clamp section, and a common MTB seatpost size is 31.6mm. I know these are both around 1 1/4 inches. Why the 0.2mm difference though?
3
votes
4answers
375 views

What's the better option to buy? [closed]

I am about to get myself a hybrid bike, but being tight on budget (~ 200USD). I didn't really have many options to choose from. I'd initially thought of buying this particular bike, Mach City Munich ...
5
votes
1answer
193 views

Saddle Position

I am a newbie to biking. I got my bike fitted in a local bike shop. I feel comfortable riding it. However, I feel (by looking at it) that the saddle is fitted way too back. It looks as if the back ...
4
votes
1answer
358 views

Are bike saddles always removable from the saddle post?

I want to buy a mountain bike soon and I’ve been doing a bunch or research. I noticed that some bike saddles can detach from the top of the saddle post, while others get removed with the whole post. ...
2
votes
1answer
325 views

Is my dropper post too long?

I got a bicycle with a dropper post. As you know, there is currently a bicycle shortage, which is why I ended up getting it online instead of in a local shop (none of which had in stock what I was ...
-1
votes
1answer
577 views

Canyon Endurace CF SL Disc: 7.0 vs 8.0 [closed]

Mission: On the market for a new road bicycle. Since May 2020 I stepped up my cycling and will probably at least triple the yearly kilometres (3k?). So I want to treat myself and I decided to invest a ...
5
votes
3answers
232 views

Reversible but not symmetrical lower plate in seatpost

I have an old seatpost that was removed from its original bike quite some time ago, now I want to use it in another bike, but I don't know if the lower plate should be positioned so it extends behind ...
3
votes
2answers
386 views

Compatible seatpost for Brooks C13 saddle with 7x9 oval carbon rails?

I just purchased a Brooks C13 saddle (7x9 oval carbon rails, the more recent version with no tape) and was hoping it would fit on my existing post (2016 Jamis Coda Sport - it's a top/bottom clamp with ...
6
votes
4answers
634 views

What do I need to change to avoid 'bouncing' in my bike seat at high RPM?

I've noticed while cycling on my road bike that, when I try to pedal very quickly, I start to 'bounce' a little in my seat. As in I'm lifting off the seat a little with each pedal, so feel I'm not ...
3
votes
0answers
64 views

Need help understanding the components of a carbon fiber seat tube to properly unseize it

I recently picked up my first carbon fiber bike which has a carbon fiber seat post that seized to the frame due to rust. I did not initially think that was possible but after looking at it, I believe ...
3
votes
1answer
57 views

Direction of saddle clamps on seatpost

I have a seatpost from a Canyon Dndurace AL 7.0 from 2016. The seatpost has a saddle clamp consisting of two parts. The lower part has one long end and a shorter one. I can rotate both parts of the ...
2
votes
1answer
78 views

Magura Vyron dropper seatpost internal shaft can be easily twisted

I had a very light crash (in fact just rode into a bush) after which I noticed I twisted magura vyron seat post. Apparently my seat post clamp was too tight.. Now it can be twisted when some force is ...
1
vote
1answer
137 views

Increasing length of seatpost on a foldable bike

One of my bike is this little Dohiker 14" electric bike, but I actually pedal a lot when riding it, and the seatpost is a bit too short. It is about 50cm long, and I would need a few more centimeters. ...
5
votes
1answer
140 views

Seat rail clamp spins in the seat post

When I last got on my Specialized Stumpjumper the seat wanted to spin freely. The seat post was firmly clamped in the frame. With further inspection the seat is spinning where the seat clamp goes into ...
2
votes
3answers
134 views

How do I put a lower seat clamp on my Alinker walking aid?

I have a walking aid called an Alinker http://www.thealinker.com/ It looks like a bicycle but it has no pedals and any bike shop can service it. My issue is the seat it's a older style so has 2 ...
1
vote
1answer
126 views

Can I use Danco waterproof grease sold for plumbing and faucets to lube seat posts and pedal threads?

I have this tube of lube lying around, which is good for plumbing fixtures. If this is good enough, I don't have to go out to hunt for bike grease during shelter in place.
2
votes
0answers
1k views

3 bolt exercise bike saddle adapter in the UK

The saddle currently fitted to my exercise bike is attached to a fixed plate with 3 bolts on it, I can't find any adapters to fit more traditional saddles (rails/posts) that are available in the UK. ...
1
vote
4answers
325 views

badass-stuck seatpost [duplicate]

I've recently found a nice bike with a steel frame. Well I noticed the aluminium seatpost was stuck but had no idea how heavily. To be honest I never had a similar problem and underestimated that ...
0
votes
2answers
356 views

What to use on saddle clamp?

I'm purchasing a new seat-post as my saddle refused to stay at the same angle with my current one; it was a second hand bike (B'Twin Triban 500) with a single bolt clamp. I'm going to switch to a two ...
3
votes
1answer
243 views

Very confused about the seatpost clamp

I can't figure the seatpost clamp on my bicycle (maybe it's stuck?). I've had it for a few months, it's quite old. I hit a bump in the street and the force lowered the seat but now I can't figure out ...
2
votes
2answers
873 views

Titanium seatpost in steel seat tube, good idea?

I want to use a titanium seatpost in a frame with a steel seat tube (Columbus Spirit tubes). Is it a good solution? I want to understand if the metals play well from a structural point of view, and I ...
4
votes
1answer
115 views

Seat post shims

I have 3 bikes (2 mtb 1road) all with different seat post diameters. Has anyone used shims. I have 1 favorite saddle. I can buy 2 shims for the fraction of the cost of new saddles. Just switch seat ...
1
vote
0answers
59 views

Thudbuster ST versus Gel-Padded Saddle

I just upgraded from a hybrid to a gravel bicycle (Fuji Jari 2.3). My hybrid (a 2000 Giant Cyprus) had a hydraulic suspension seat post and a generously-padded comfort gel saddle. I have a weakened ...
10
votes
7answers
3k views

How to stabilise the bicycle seatpost and saddle when it is all the way up?

It is a standard column bicycle seat and I realised maybe I should have it raised to top (I can still stand the bicycle up using my toes) but the saddle rocks as there is no column to stop it moving ...
0
votes
2answers
206 views

Seat clamp keeps unscrewing, what is the preferred solution?

To prevent stealing of the seat, I replaced my "fast lock" seat clamp with a model using a regular screw: The problem is that the screw keeps unscrewing, and I'm already tightening quite strong. I ...
4
votes
1answer
644 views

Suggestions for protecting jeans from saddle clamp bolt

I’ve got a bike whose seat post uses the traditional style saddle clamp. It works! The saddle is firmly attached to the bike. Hooray. However. This bike is sort of a “café racer” - I mainly pootle ...
4
votes
1answer
382 views

Bolt holding saddle to seatpost broke

I have a saddle somewhat similar to this one. One bolt holding saddle clamp to the seatpost. Some half a year ago I was riding with no hands and leaned back a bit. Suddenly, I fell down the bike on ...
1
vote
1answer
145 views

Does a seatpost affect the rigidity of the frame?

Is it possible to use a zero offset seatpost to make the bike frame more rigid? I consider the Crank Brothers Cobalt 1 Straight Seatpost.
0
votes
1answer
62 views

which suspension seatpost for a granny who wants a comfortable ride while cruising the neighborhood [closed]

It is so hard to find info for the granny who just wants some general info for a comfortable ride. I don't need a professional mountainbike seatpost and not worried about if it is carbon or not, don'...
1
vote
1answer
288 views

Reverb dropper post lever loose

The lever to raise and lower my Rockshox Reverb Stealth 31.6 dropper post comes loose occasionally and can swing around 360 degrees. My seat is then stuck until I tight up the screw. When I re-tighten ...
1
vote
0answers
138 views

Carbon integrated seatpost small dent

I have a Ridley Noah frame that has a really small dent in the integrated seatpost, the dent itself does not seem to be caused by an object hitting it. It looks like it has been caused by hanging it ...
-1
votes
1answer
74 views

Fuji Aloha 2.0 Seatpost too long?

Let me explain my problem. I just bought a used Fuji Aloha 2.0 (56 cm), and the saddle is a little high for me. Actually, the original seatpost is taking approximately 2.4 inches (6 cm) from me. If ...
3
votes
1answer
144 views

Rockshox Reverb dropper seatpost squashing from new

I have a new bike with factory-fitted Reverb Stealth dropper seatpost. Having never had one before, I would like to know what movement you would expect on a seatpost if any. If I lift the bike up by ...
6
votes
1answer
188 views

'Micro adjust' saddle clamp not allowing fine enough adjustment (on SP12 suspension seatpost)

I have an Suntour SP12 seatpost, and the saddle is held on by two clamps on either side. The clamps are splined, but these splines only allow adjustment of around 6-8 degrees which is far too much ...
1
vote
0answers
98 views

Seat clamp slid the seat down as I was riding, hurt my knees [closed]

So I was riding a community shared bicycle that many city's have that you can ride around for a small fee. While I was riding it, the seat clamp must have been loose and the seat was sliding down ...
4
votes
2answers
398 views

How to access seat-post lever on the handlebar?

I would like to change the position of my seat-post lever but in order to do so, I have to untighten its screw. The problem is that I can't manage to access the screw, due to the presence of the hard ...
1
vote
0answers
97 views

Any 36.4mm Dropper Seatposts?

I've a diameter of 36.4mm, are there any dropper seat posts that make the size diameter for my bike?
1
vote
1answer
166 views

Is there a non-proprietary standard for oval seat-tube/post?

I see Pinarello Dogma and Gan S frames have a proprietary seatpost/seattube combination, which don't have a circular section. An advantage of that design in my opinion is that it's impossible to have ...
2
votes
1answer
137 views

How do I lower the saddle on a Scirocco bicycle?

I've acquired a second-hand ladies' Scirocco Elegance 21 speed bicycle. I need to lower the saddle but can't quite see how it can be done.
2
votes
0answers
316 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 ...
4
votes
1answer
277 views

Fitting a saddle with non-round rails to a Stevens Arcalis

What options are there to change the saddle mount on an aero seatpost of an Stevens Arcalis 2017 to mount a saddle with non-round carbon rails? Below you can see the saddle mount that is designed to ...