Dahon Jetstream P8 Seapost Size

[bippbike]

Hello,

I'm looking for some advice.

I have a Dahon Jetstream P8.

The seatpost appears to be around 34mm in diameter.

However it is shimmed. I weight around 105kg, and the shim is focussig the stress on the seatube.

I can see some tiny cracks appearing around the circular hole at the end of the seatube clamp slot.

I've measure the seatube internal diameter, it appears to be around 36mm ?

I've verified that a 34.9mm seat tube is very loose, so too small.

Can anyone advise the correct seat tube diameter for this model of Dahon ?

Photo attached.

Many Thanks.

 

[StuAff]

Dahon seatposts are 33.9mm, on nearly all models, including Jetstreams.