Need something 600 mm for a folding project. Carbon would be nice. A dropper might be a faster fold but overkill really (and only seen 500 mm). Only found one alloy post on Alien Express. Brompton are 31.8 and reaming the seat tube is not possible.

Any ideas welcome.

https://www.internet-bikes.com/en/82556-vwp-seat-post-fixed-272mm-x-600mm-aluminum-silver/?show_currency=GBP&gclid=CjwKCAjwwab7BRBAEiwAapqpTByp1cpXnL4kIKHFuDWAxsmGEYhTHmCs3Fgr9j7kpg7D5Bhp5BPJIBoC1xoQAvD_BwE#

And a shim?

Not thought of a shim. Thanks. And I’d seen that one for my kiddyback tandem. Sadly Use can’t make me a carbon one. I asked.

I guess reaming out 0.1mm isn’t so bad. But it’s a cheap project.

Sub search on that site and another measure of the original showed a 550mm that is just the job. Thanks for the link. Purchased.

https://www.internet-bikes.com/m/en/281831-ergotec-seat-post-atar-550-x-316-mm-offset-10-mm-black/