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Brompton gearing and chain length
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Topic: Brompton gearing and chain length (Read 3017 times)
Gattopardo
Lord of the sith
Overseaing the building of the death star
Brompton gearing and chain length
«
on:
04 October, 2017, 03:36:51 pm »
My brompton has a 3 speed Sturmey archer hub and was geared to 50 13. The replacement crank is a 54.
What rear cog would I need to keep the gearing similar and then the chain length. Currently I have a 13, 14 and 15 toothed rear cog.
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Diver300
Re: Brompton gearing and chain length
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Reply #1 on:
04 October, 2017, 04:12:49 pm »
54 - 14 is almost exactly the same gearing as 50 - 13
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Quote from: Kim
Paging Diver300. Diver300 to the GSM Trimphone, please...
PaulF
"World's Scariest Barman"
It's only impossible if you stop to think about it
Re: Brompton gearing and chain length
«
Reply #2 on:
04 October, 2017, 04:12:55 pm »
Unfortunately you can't have both the same gearing and the same chain length.
14.04T but they're pretty rare
to keep the same gearing so obviously the 14T or a 9T to keep the same chain length but they're even rarer.
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Gattopardo
Lord of the sith
Overseaing the building of the death star
Re: Brompton gearing and chain length
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Reply #3 on:
04 October, 2017, 04:30:51 pm »
This just confused me more will 102 be too long and 100 too short?
Also am running a 1/8th chain with a connector.
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Pickled Onion
Re: Brompton gearing and chain length
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Reply #4 on:
04 October, 2017, 05:59:35 pm »
102L will be absolutely fine with 54x14 (if that's what you're asking) since the table shows it will accommodate a two speed 54x12 - 54x16
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Quote from: tiermat
that's not science, it's semantics.
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Brompton gearing and chain length