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FIXED: Brompton Gear Shifter Problems! 2/6-Speed 2017 & Newer
My wife and I are traveling the world (@smartveganlife) and we recently switched to new H6R Brompton bicycles (2019). After only two weeks in the humid heat of Bali, shifting problems started to occur on both bikes simultaneously. The derailleur stopped switching completely and the hub gear shifter got stuck when switching from 1 to 2.
It took us quite some time until we discovered the problem. It turned out that the cause of this problem is a combination of temperature and humidity. Somehow the plastic material of the Brompton gear shifters expands, which leads to higher friction within the gear shifter housing. The "simple" sanding of certain parts within the gear shifter housing reduces the friction and the derailleur and hub switching operation works fine again.
In this video, I document the procedure on how to fix the Brompton gear shifters and get them working again! I hope it will save you some precious time.
P.S.: Brompton is aware of the problem.
0:00 - Intro
0:10 - Which Brompton are affected
0:22 - Description of the problem
0:34 - Experiencing the problem
2:12 - Origin of the problem
3:20 - Disassembly (derailleur gear shifter)
5:14 - Fixing the problem (derailleur gear shifter)
7:08 - Reassembly (derailleur gear shifter)
10:15 - Disassembly (hub gear shifter)
10:29 - Fixing the problem (hub gear shifter)
10:56 - Reassembly (hub gear shifter)
13:03 - Testing the shifting mechanism
13:32 - Brompton CEO confirms the problem
Check out my wife and I traveling the world:
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#howtofix #brompton #bromptonbicycle