Thread: Wondering about Brompton Philosophy
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Old 01-05-16 | 07:42 AM
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tcs
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From: Parts Unknown

Bikes: Mike Melton custom, Alex Moulton AM, Dahon Curl

Originally Posted by BassNotBass
The Brompton sub frame (rear triangle) has a spacing of ~120mm which the 3 spd hubs fit in. Other IGHs tend to fit frames with 135 mm spacing although there are owners who have widened the rears of their Brommies and installed 7+ speed hubs but that compromises the bike's folded size to a small degree.
FYI and FWIW: Sturmey-Archer 5- and 8-speed IGHs have been and continue to be available in 120mm OLD models.
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