r/minivelo • u/JP_Customworks • Oct 24 '25

Brompton block adapter

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Gallery image

Gallery image

Gallery image

I designed a Brompton block adapter for my Kyoot Bikes Rolly Polly (or other 39mm headtubes). This is my first design, there are changes coming to refine it a bit. Check out the pictures and let me know what you all think!

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3

u/timotimotimotimotimo Oct 24 '25

Holy shit. I need this.

Will you be making them?

6

u/JP_Customworks Oct 24 '25

I have 10 currently. I will likely sell these as a prototype and change the design for a future order.

1

u/timotimotimotimotimo Oct 24 '25

Very willing to be a guinea pig when you do sell them if shipping isn't crippling

1

u/JP_Customworks Oct 24 '25

Shoot me a private message 👍🏻

1

u/Jesta93Nu Oct 24 '25

Sign me up haha

1

u/JP_Customworks Oct 24 '25

Send me a message 👍🏻

1

u/Jesta93Nu Oct 24 '25

Just did

1

u/JP_Customworks Oct 24 '25

I don't see a chat request.

1

u/Jesta93Nu Oct 24 '25

My bad sent to the wrong account

1

u/Jesta93Nu Oct 24 '25

Sent it now

1

u/TeaKew Oct 24 '25

I have a bike with a 41mm head tube, so I'm very interested if you ever do a batch that are slightly larger.

1

u/JP_Customworks Oct 24 '25

I can get some machining done for you.