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-   -   Seatpost for bike (https://www.bikeforums.net/folding-bikes/1148008-seatpost-bike.html)

rapattack 11-01-18 03:08 AM

So i got the new seatpost at last and it was the right size but how to tighten this quick release thing properly. I tried to manually tighten and then flick the thing over but it needs to be more tight. I am not very strong due to disability. Its not the type you use an allen key. Should i just get the other type so this is not an issue in the future? as u can see the last time i tried to tighten this i ruined a bit of the teeth around the nut or whatever it is calledhttps://cimg4.ibsrv.net/gimg/bikefor...dcdc88cb60.jpg

rapattack 11-01-18 03:12 AM

This is what it looks like on the bike and with saddle. Altho not fully extendedhttps://cimg9.ibsrv.net/gimg/bikefor...60fb23c25.jpeg

Nightdiver 11-04-18 07:25 PM

If you can't get the quick release tight enough, but it worked okay with the old seatpost, then it probably means that your new seatpost isn't actually the correct size. Just 0.2 mm difference in diameter can make the post fit or not fit.

rapattack 11-04-18 11:04 PM


Originally Posted by Nightdiver (Post 20648179)
If you can't get the quick release tight enough, but it worked okay with the old seatpost, then it probably means that your new seatpost isn't actually the correct size. Just 0.2 mm difference in diameter can make the post fit or not fit.

Its more likely to be me as the issue. Just need to know what tool i should use. There was no old seatpost as this is a object that was thrown away. No former seatpost

Nightdiver 11-04-18 11:47 PM

Shouldn't require a tool. That looks to be a knurled knob intended for finger tightening. Is it able to be turned in either direction? If not it may be seized. If so, then I'd say again that your post may not be the correct diameter. You're tightening before you close the QR lever right?

rapattack 11-06-18 06:55 AM


Originally Posted by Nightdiver (Post 20648502)
Shouldn't require a tool. That looks to be a knurled knob intended for finger tightening. Is it able to be turned in either direction? If not it may be seized. If so, then I'd say again that your post may not be the correct diameter. You're tightening before you close the QR lever right?

oh i c ...i might replace it then. I just am very weak. yes it turns both ways. yeah no the size is good. Very little space. I dont know how to explain but its good. Yes tightening before closing. Are these things easy to get on the net...might c what aliexpress and ebay have. https://duckduckgo.com/?q=seatpost+r...s-296184-1.jpg

12boy 11-06-18 09:40 AM

If you cannot get the QR to close properly you can always try another QR. Or....On my Xootr Swift the seat post has 2 QRs and the handle post another. Since I rarely fold it I took the QRs to a hardware store and bought some high quality allen bolts and some nylock nuts, using the QRs to make sure of length and diameter. They never slip.Takes an Allen wrench and a 12 mm wrench to adjust, though.

rapattack 11-06-18 09:49 AM


Originally Posted by 12boy (Post 20650730)
If you cannot get the QR to close properly you can always try another QR. Or....On my Xootr Swift the seat post has 2 QRs and the handle post another. Since I rarely fold it I took the QRs to a hardware store and bought some high quality allen bolts and some nylock nuts, using the QRs to make sure of length and diameter. They never slip.Takes an Allen wrench and a 12 mm wrench to adjust, though.

Oh yes that would work way better. Thanks for that idea

fietsbob 11-06-18 04:11 PM

Brompton Penta clip is so much better .. now offered in black
http://brilliantbikes.co.uk/3542-thi...clip-black.jpg


& silver

http://www.gbcycles.co.uk/images/pro...item_71000.jpg

rapattack 11-07-18 10:01 AM


Originally Posted by fietsbob (Post 20651414)
Brompton Penta clip is so much better .. now offered in black
http://brilliantbikes.co.uk/3542-thi...clip-black.jpg


& silver

http://www.gbcycles.co.uk/images/pro...item_71000.jpg

Oh thats not what i am after. The one i am after is further down...not under the seat

fietsbob 11-07-18 10:31 AM

I'm commenting on the cheap steel one on top.



at the bottom,
seat post band clamp QR, like those on wheels
if you get one with an internal cam, of steel , you can apply more force,
than you can with what you show, an external eccentric of aluminum..






...

rapattack 11-09-18 05:14 AM


Originally Posted by fietsbob (Post 20652390)
I'm commenting on the cheap steel one on top.



at the bottom,
seat post band clamp QR, like those on wheels
if you get one with an internal cam, of steel , you can apply more force,
than you can with what you show, an external eccentric of aluminum..






...

Which cheap steel one at the top? sorry you lost me. i dont have a brompton so i dont know it. Sorry i am still lost

Tamiya 11-09-18 06:55 AM

FYI mini folders like DaHon have a 2-piece TELESCOPIC seatpost - 2 tubes not 1, 2 clamps.

Took my vintage DaBike out today, dammit broke a lever on seatpost. :(

rapattack 11-09-18 06:57 AM


Originally Posted by Tamiya (Post 20655162)
FYI mini folders like DaHon have a 2-piece TELESCOPIC seatpost - 2 tubes not 1, 2 clamps.

Took my vintage DaBike out today, dammit broke a lever on seatpost. :(

Oh ok i didnt know that. Ouch hope you can fix that

fietsbob 11-09-18 11:45 AM


Originally Posted by rapattack (Post 20655114)
Which cheap steel one at the top? sorry you lost me. i dont have a brompton so i dont know it. Sorry i am still lost

Saddle clip, to fit a saddle on a typical tubular seat post's 7/8" upper portion..
(a universal dimension, Its the seat post tube's lower diameter that differs)

the multi-plate friction holds securely and allows very fine tuning of saddle angle..
and its light..


....

rapattack 11-10-18 04:07 AM


Originally Posted by fietsbob (Post 20655613)
Saddle clip, to fit a saddle on a typical tubular seat post's 7/8" upper portion..
(a universal dimension, Its the seat post tube's lower diameter that differs)

the multi-plate friction holds securely and allows very fine tuning of saddle angle..
and its light..


....

oh ok i sort of understand but not how it relates to my situation. What 'lower dimension'? do you mean the bottom of the seat post? ok not sure what a multi-plate....' is but i think you mean the thing that holds the saddle to the seatpost? oh yes yes the angle sure i get that...light? do you mean if someone has a light on the back of the seatpost? Of which i dont. But how does this relate to my situation tho?

fietsbob 11-10-18 11:38 AM

As an example; my Brompton steel seat post is 1.25" throughout it;s length,
but is reduced to 7/8" at the very top , where the saddle clip goes..

Capisce? :foo:

'light' as in weight . .. always a first or 2nd question about bikes...




...

rapattack 12-01-18 08:45 AM


Originally Posted by fietsbob (Post 20656997)
As an example; my Brompton steel seat post is 1.25" throughout it;s length,
but is reduced to 7/8" at the very top , where the saddle clip goes..

Capisce? :foo:

'light' as in weight . .. always a first or 2nd question about bikes...




...

so sorry been so busy forgot to come back. I am bit lost sorry so i might leave this question. I think i would have to see what your saying. Ok lightweight

fietsbob 12-01-18 11:25 AM

A Brompton seat post , showing 2 outside diameters ...

https://dinokiddo.me/wp-content/uplo...6/P1090820.jpg

fietsbob 12-01-18 11:29 AM

also in Titanium (Aftermarket out of Asia)

https://i.ebayimg.com/images/g/pPsAA...7Dh/s-l500.jpg

rapattack 12-02-18 07:43 AM


Originally Posted by fietsbob (Post 20686377)
A Brompton seat post , showing 2 outside diameters ...

https://dinokiddo.me/wp-content/uplo...6/P1090820.jpg

yup ok...sorry i still am lost as to what this as to do with

rapattack 12-02-18 07:43 AM


Originally Posted by fietsbob (Post 20686381)
also in Titanium (Aftermarket out of Asia)

https://i.ebayimg.com/images/g/pPsAA...7Dh/s-l500.jpg

Whats this about?

fietsbob 12-02-18 10:51 AM

Are they not Pretty?

top; 22,2mm,* , shaft; 31.75mm or 7/8" & 1.25"..

all plain tube saddle clips are 7/8" so any stepped diameter tubular seat post will be 7/8"

though the remaining shaft diameter differs..

rapattack 12-03-18 05:29 AM


Originally Posted by fietsbob (Post 20687459)
Are they not Pretty?

top; 22,2mm,* , shaft; 31.75mm or 7/8" & 1.25"..

all plain tube saddle clips are 7/8" so any stepped diameter tubular seat post will be 7/8"

though the remaining shaft diameter differs..

they are ok but not the right size for me. I am not really into pretty colours maybe. sorry i dont understand anything about the dimensions. I am really really really lost what this is about

rapattack 12-08-18 05:36 AM

Good news is i have it all sorted now. I also had the saddle on wrong so just looked on youtube. I have tightened it up properly


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