Sprockets for Brompton wide-range hub BWR

[Philip Benstead]

Sprockets for Brompton wide-range hub BWR

I am seeking Sprockets for Brompton wide-range hub.

They must be flat and have 18/19/20 or 21 teeth and nine tabs.

Remember they need to be 3/32 and work on an 8-speed chain.

Question

Which Shimano cassette sprocket would be suitable, or another make?

Can you suggest a supplier?

[hoogerbooger]

You should be able to Google them. the shimano tech website shows what sprockets on.

https://bike.shimano.com/en-EU/product/ ... G50-8.html

(You'll have to remove the 3 pins holding the bigger sprockets together on Shimano cassettes like this)

[Philip Benstead]

You should be able to Google them. the shimano tech website shows what sprockets on.

https://bike.shimano.com/en-EU/product/ ... G50-8.html

(You'll have to remove the 3 pins holding the bigger sprockets together on Shimano cassettes like this)

I assume you drill the heads of the pins to release the sprockets?

[rogerzilla]

You can buy individual HG-pattern sprockets made by Shimano or others, e.g. ZTTO. I have a Dura-Ace and a ZTTO on my 2-speed Brompton.

[Brucey]

miche also do individual HG type sprockets, but these may be 11/128" (for 9s,10s,11s,12s etc.) rather than 3/32". FWIW you can easily grind a standard SA part to do this job.(the BWR driver is steel, so three lugs that are not quite the right shape will still work OK.)

[Philip Benstead]

You can buy individual HG-pattern sprockets made by Shimano or others, e.g. ZTTO. I have a Dura-Ace and a ZTTO on my 2-speed Brompton.

Do you mean these?

https://www.aliexpress.com/item/1005006 ... Redirect=y

[rogerzilla]

Oh no, they look like something else entirely.

https://www.ebay.co.uk/itm/304471055773 ... media=COPY