Seat lowering gremlins

redbikejohn

Does anyone else have a gremlin in their garage that keeps lowering their seat height half a mm a week so that you don't notice ....... until your knees are around your ears :shock:

:oops: :oops: :oops:

HTupolev

Yeah, they were messing with my 1983 Miyata 710. Made me second-guess myself a whole bunch every time I hopped on the bike.

Putting a mark on the seatpost at the level of the clamp seemed to discourage their antics.

mrb123

Maybe you're growing.

debeli

Electrical take is the answer.

If you have children your size (which I do) and if you lend bikes outside the family (ditto), then they will come back to you with the seat ever-so-slightly out.

Electrical tape is good.... or on metal posts a scratched arrow with initials....

chris_bass

do you find this happens when you wear less padded shorts?

Matthewfalle

Debeli wrote:

Electrical take is the answer.

If you have children your size (which I do) and if you lend bikes outside the family (ditto), then they will come back to you with the seat ever-so-slightly out.

Electrical tape is good.... or on metal posts a scratched arrow with initials....

noooooo! don't go scratching schizzle. barbarian.

little paint brush or straw from wd can. tiny blob of paint. sorted.

don't go scratching stuff..........

veronese68

Chris Bass wrote:

do you find this happens when you wear less padded shorts?

Usually happens when I wear these:

darkhairedlord

Try these instead.

trekvet

Either it the kids as per above, in which case lock yours and buy them their own bike/s. On the other hand if the post is slipping like one of mine did, could put a seatpost or handlebar reflector clamp, or two, on the post resting on the seatpostclamp. It stopped mine from slipping.

keef66

Use some carbon assembly paste on the seatpost. It will stop it slipping without having to go all gorilla on the seatpost clamp.

(I did once use a jubilee clip on one of the kids' bikes when the cheese-based clamp bolt stopped working. Hideous but effective)

chris_bass

Veronese68 wrote:

Chris Bass wrote:

do you find this happens when you wear less padded shorts?

Usually happens when I wear these:

maybe trying pairing them with these:

Matthewfalle

TrekVet wrote:

Either it the kids as per above, in which case lock yours and buy them their own bike/s. On the other hand if the post is slipping like one of mine did, could put a seatpost or handlebar reflector clamp, or two, on the post resting on the seatpostclamp. It stopped mine from slipping.

What an ugly "solution". Hideous. Don't do this.

Do as Keef suggests or, in a similar vein, copperslip.

Scratching this, random reflector clamps that.... barbarians.

solosuperia

I had a Gitane with Columbus tubing measuring internal dia seat tube v external dia seat post using a manual vernier caliper the same!
After a reasonable ride notice the seat had dropped 2cms.
After trying many different solutions my favourite and least damaging made up a sleeve out of a coke tin put it in the tube dropped the post in and Robert's your uncle. Did trim the excess out the top af tube with a stanley knife..... Worked a treat and wasn't visible.

kajjal

I managed to put my saddle over an inch too high after servicing the bike. Some how I did not notice until a few rides later when both my knees hurt and also some muscle pain down one side. I was wondering what was going on until I checked the bike setup.

Now back to normal, pain is going and riding much more easily.

darkhairedlord

Two bolt seat post clamp. Bottom half clamps aRound the seat tube, top half around the seat post.

Matthewfalle

SoloSuperia wrote:

I had a Gitane with Columbus tubing measuring internal dia seat tube v external dia seat post using a manual vernier caliper the same!
After a reasonable ride notice the seat had dropped 2cms.
After trying many different solutions my favourite and least damaging made up a sleeve out of a coke tin put it in the tube dropped the post in and Robert's your uncle. Did trim the excess out the top af tube with a stanley knife..... Worked a treat and wasn't visible.

its called a shim and has been used for decades.

Guinness cans are best for this purpose because Guinness is good for you and makes you strong.