X4 Brompton External 4 Cogs upgrade kit compatible with MiniMODs, Hubsmith 2/3 speed hubs and most ORZ rear hubs

Options:

(a) Circlip type kit :

• Circlip type 4 speed free hub body x 1.
• We will include 2 sizes of snap rings (1.2, 1.5, 1.8 or 2mm. Pick 2 during checkout in "order comment". 1.2 and 1.8 will be default if not specified)
• Black screw caps are not included, you can utilize the original ones.

(b.) Lock Nut type Kit

• Lock Nut type 4 speed free hub body x 1
• Lock ring (shimano spec) x 1
• Left and right screw nuts (replace old ones for proper dimension)
• Lock Nut type hub is external 5 cogs possible

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Note :

• This listing is only for the 4 speed free hub upgrade kit (circlip or locknut type).
• You need your own 3rd party rear hub from MiniMODs, Hubsmith or most ORZ wheelset.
• We will suggest using our X3+1 (11-14-17t unibody cog set with one extra larger cog) for easy and efficient performance (NOT INCLUDED)
• The upgrade free hub body is with steel balls bearing, should you need ceramic balls bearing or a whole 4 speed set, please check out our X4Ceramic hubs.