52
votes
How to stabilise the bicycle seatpost and saddle when it is all the way up?
Your seat post is not all the way up — it's too far up.
If you need the saddle at that height, then you need a longer seat post. As mentioned in comments, there is usually a "minimum insertion&...
- 75.3k
31
votes
How do I place the seat back 20 cm with a full suspension bike?
The only safe answer is to buy a bigger bike frame.
When your adaptor fails, you will descend rapidly onto the rear wheel.
The remaining original seatpost has an excellent chance of tearing your chest ...
- 120k
30
votes
How to stop bike renters overextending seatposts?
I assume they are extending the seat post that far because they need it for an appropriate saddle height.
So the solution is simple: Offer bikes with larger frame sizes or at the very least equip the ...
- 25.8k
23
votes
Accepted
Why are all road bike frames now squashed parallelograms?
Sloping top tubes started with mountain bikes, and were brought over to road bikes by Giant, following a design from Mike Burrows. Partly because a perpendicular joint between the seat tube and top ...
- 28.5k
21
votes
Accepted
What are the differences between a seatpost-mounted and frame-mounted rear rack
The advantages of seat mounted racks are that they don’t require rear dropout rack lugs; some of the seat mount racks have quick release levers so you can easily take them off (while racing or ...
- 28.9k
19
votes
Accepted
Is it safe to drill a cable exit hole in a seatpost?
I suggest to avoid drilling holes in the seatpost alltogether. Just find a seatpost that has an opening at the top, there are plenty available usually on older seatposts with two-bolt mounting system.
...
- 2,053
18
votes
Accepted
Cracked seat post
That seat post is made of carbon fiber tube and metal seat mount that plugs into it. The carbon tube is about to split and the inner part you see is the metal plug. It should be replaced immediately ...
- 21.6k
18
votes
How to stabilise the bicycle seatpost and saddle when it is all the way up?
Seat posts are usually marked with a line indicating a minimum insertion point. Extending the seat post past that point poses a risk of the seat post bending, or cracking the frame. While 250-300mm ...
- 18.3k
17
votes
Is it unsafe to have a seatpost "slammed"?
Look at it this way: would you feel comfortable taking your saddle off, grabbing a 1 yard/meter long bit of lumber, and whacking down on the top of the seatpost moderately hard with that chunk of ...
- 10.3k
16
votes
How to make old bike's seatpost slide smoothly when it needs adjustment again?
There are different things that can cause this problem and different tools and techniques that can be used to fix it, depending on the cause and severity.
Frame material cannot be left out of the ...
- 80k
15
votes
Accepted
Bike comes with frame integrated bolt seatpost clamp - can I cut it off and use QR?
Yes it's possible to hacksaw the clamp bosses off and then file the seat tube round and smooth so that a quick release clamp would slip over it.
Before taking such drastic action - which will ...
- 75.3k
13
votes
Before re-inserting a stuck seat post what should I do to the steel/alloy surfaces?
I would not advise reducing the seatpost, nor widening the frame's ID. A close fit is a good thing for a seatpost.
Instead, clean the seatpost using your preferred solvent, and allow to dry. If its ...
- 120k
13
votes
Trying to match up a new seat for my bicycle and having difficulty finding one that will work
Its a Giant Sedona, probably from the 2000's.
But that information is not very useful for replacing the saddle. If you look up underneath the saddle, there will be two parallel rails, and the ...
- 120k
13
votes
Trying to match up a new seat for my bicycle and having difficulty finding one that will work
The stickers tell you it's a Giant Sedona. To me it looks like a fairly old model (they still make a similar hybrid under that name, but with suspension).
But you don't need the model details to ...
- 55.7k
12
votes
Accepted
How to install a saddle on a seatpost with a top facing bolt
You use the front bolt to set the angle first, then torque the rear bolt. Sometimes a few times to get it right.
The front bolt is adjusted with the thumbdial or a lever put into one of the holes in ...
- 13.1k
12
votes
Aluminum seatpost broken into a steel frame
That's a challenge right there - I hope the bike wasn't being ridden at the time it failed !
Clearly the post is dead, so damage to that is okay. You want to save the frame.
Remove the seatpost ...
- 120k
11
votes
Is there more than one ideal seat post height based on type of riding?
Yes. However, it varies by type of riding and conditions. All Mountain is probably the extreme example of this (and the main market for dropper seatposts). All Mountain bikes are designed to be ...
- 9,928
11
votes
Remove lubricant from seat tube and seat post
A thorough way to do it would be to:
Remove the cranks, bottom bracket and seat post.
Make sure there is a decent hole between the seat tube and bottom bracket shell (might depend on the frame).
Ram ...
- 286
11
votes
Accepted
Remove lubricant from seat tube and seat post
This is an XY problem. Seatposts should be lubed. While removing all lube may solve your slipping problem, it will likely do so by making the seatpost corrode into place, which isn't something you ...
- 12k
11
votes
Accepted
How to make old bike's seatpost slide smoothly when it needs adjustment again?
Check for burrs (a small ‘lip’ of material) on the inside edge of the top of the seat tube). That’s probably what is scratching the seat post. If you stick you finger carefully in the top if the seat ...
- 75.3k
10
votes
What is the minimal seat post depth?
Most seat posts have a "minimum" insert of 3 to 4 inches. But this varies with the material and the thickness of the post, and the weight of the rider means the minimum might still be too little.
As ...
- 120k
10
votes
Safely cutting down a seatpost
I agree with @ojs answer on point (1), you can just cut it with a hacksaw but with the exception of point (2) "the common consensus seems to be at least 5 cm of insertion" - the standard minimum ...
- 219
10
votes
Accepted
Is it possible and safe to attach this type of seat to suspension seatpost?
Looks like the new one has the same kind of saddle rails so you can remove the attachment from it and try the bare saddle rails in the suspension seatpost. It should work!
Undo the two big black nuts ...
- 12.7k
10
votes
Bolt holding saddle to seatpost broke
You need to use high tensile bolts for high tensile positions like this.
A class 8.8 bolt (metric) or grade 8 (US) or higher is appropriate. Cheese-grade steel from the local discount hardware ...
- 120k
10
votes
Suggestions for protecting jeans from saddle clamp bolt
I would suggest cutting off the extra threads. If you have access to a Dremel or similar tool it wouldn't be too difficult. Doing it with a hacksaw could be a real pain. Alternatively you could check ...
- 18.3k
10
votes
Bike seat tube is messed up
What’s happened here is that you have expanded the diameter of the top of the seat tube, in the process it looks like you have made some small cracks on the top edge, and created a number of burrs. ...
- 75.3k
10
votes
How do I fix the comfort of my bike?
The first things I look at to smooth out a ride are:
Least expensive: Tire pressure. Printed on the tire is the recommended maximum inflation. You can experiment with lower tire pressures to smooth ...
- 19.9k
10
votes
Accepted
Will grooves on seatpost cause rusting inside frame?
The best thing to do is apply a thin layer of grease to the inside of the seat tube and the outside of the post (only the part of the post inside the seat tube needs grease) and set the seat height ...
- 19.9k
10
votes
How to stop bike renters overextending seatposts?
If these are beach cruisers or similar, they'll typically have 22.2 or 25.4mm seatposts (7/8" or 1"). If so, putting longer seatposts in all of them would be cheap. This isn't scummy if what ...
- 80k
10
votes
How to mark seatpost position?
Not a strict answer to the direct question, but an answer to the question of sharing between different people. If you are ready to change the seatpost, having a dropper post is a nice solution when ...
- 16.1k
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