Author Topic: Brompton Sachs/SRAM 3 Speed Hub and sprocket Set  (Read 941 times)

Brompton Sachs/SRAM 3 Speed Hub and sprocket Set
« on: August 24, 2020, 04:45:02 pm »
Trying to get the 2 cog sprocket set 13 and 15, which I'm told is no longer available

just the cogs would help

https://brilliantbikes.co.uk/brompton-rear-sprockets-and-spacers/414-brompton-sr6-stack.html?search_query=Brompton+Rear+Sprocket+for+SRAM%2FSachs&results=2386

any ideas guys


LittleWheelsandBig

  • Whimsy Rider
Re: Brompton Sachs/SRAM 3 Speed Hub and sprocket Set
« Reply #1 on: August 24, 2020, 05:12:33 pm »
They are just standard 13t and 15t SA-style sprockets. Most 6sp Bromptons use 3/32” chain but a few had 1/8” chains. Since you will need to replace the chain anyway, just get 13t and 15t 3/32” three-dog sprockets.
Wheel meet again, don't know where, don't know when...

Re: Brompton Sachs/SRAM 3 Speed Hub and sprocket Set
« Reply #2 on: August 24, 2020, 05:25:13 pm »
They are just standard 13t and 15t SA-style sprockets. Most 6sp Bromptons use 3/32” chain but a few had 1/8” chains. Since you will need to replace the chain anyway, just get 13t and 15t 3/32” three-dog sprockets.

Thanks, very helpful - I agree they do look the same, but when I asked the Dealer his reply was:

"There is no alternative unfortunately, not that we have found anyway"

LittleWheelsandBig

  • Whimsy Rider
Re: Brompton Sachs/SRAM 3 Speed Hub and sprocket Set
« Reply #3 on: August 24, 2020, 07:12:35 pm »
They are talking bullshit. If the change up to the big sprocket is too slow, just grind the tops off a few of the teeth of the 15t cog to match the existing profile but it will probably be fine as is. Reuse the existing spacer, etc.

https://brilliantbikes.co.uk/brompton-rear-sprockets-and-spacers/389-brompton-sturmey-archer-13t-stack.html
+
https://www.sjscycles.co.uk/sprockets/sturmey-archer-15t-sprocket-332-flat-hsl945/

Both were on the first page of searches. There are other suppliers.
Wheel meet again, don't know where, don't know when...