Thread: [Brompton] Adding a front derailleur: Clamp?
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Old 08-24-21 | 03:04 PM
  #72  
2_i
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Bikes: Trek 730 (quad), 720 & 830, Bike Friday NWT, Brompton M36R & M6R, Dahon HAT060 & HT060, ...

A cheap no-name BB will be nearly for sure JIS. Distinguishing the tapers with calipers is very hard. Angling the calipers a bit will give a bigger error than the difference between the tapers.
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