I've got a dose of seatpost slippage

[BigonaBianchi]

...the clamp is sound and tightened correctly but the seatpost is gradually slipping down.....is there an easy way to remedy this, or is it an incurable affliction?

 

[Steve Austin]

This is the stuff you want!

 

[BigonaBianchi]

thanks...does it work on an alloy post in a steel frame?

 

[P.H]

thanks...does it work on an alloy post in a steel frame?

Metal on metal shouldn't need any compound. Is there something stopping the clamp from tightening further? It might need a shim, easily made from a bit of coke can. Or sometimes putting a washer on the seatclamp bolt allows an extra bit of thread to be used.

 

[Steve Austin]

yep. It works fine. It'll stop it seizing in there too.

 

[BigonaBianchi]

ok..I'll try it before I use a shim...on the basis that eventually I suppose i'll need anothe rshim..then another as i suppose this is because th eseat tube is expanding with use?

 

[bonj2]

are you sure it's the right size

 

[yenrod]

 

[bonj2]

you get a lot of different sizes, some very close. prob'ly just measured it approximately? (e.g. with a tape measure rather than calipers?) easy mistake to make. a 31.6 clamp will clamp a 30.9 post, but only if tightened all the way and then not securely.