Brompton X7 Semi-Integrated Cog Set (11-13-15-18-21-24-28T)

Brompton Stock P/T Line original 4 speed wheelset (or 3rd parties compatible ones) is Compatible #X5UnibodyCogSet

Reuse your old wheelset (P/T Line) and expand to #WiderThanPTLine 7-speed gear range

Features :

1. CNC machined 7 cogs (11-13-15-18-21-24-28T) in One Semi-Integrated + 1.5mm & 1.8mm Circlip snap rings + spacer (MiniMODs)
2. SCM440H heat-treated steel. ED-Electrophoresis deposition surface processed black
3. Most efficient drive output, crispy clear shifting reaction
   
4. 9 spline Shimano spec, compatible with 4 speed Brompton (now P/T Line and Eelectric B: BWR hub) wheelset. You will need 3rd party advanced derailleur system (such as #MiniMODs X series) upgrade (not included in this listing).
5. Compatible with most 3rd party 4-speed wheelsets (MiniMODs, Hubsmith, H&H, Andoza, Joseph Kuosac, ORZ, RIDEA, Suncord, SMC...) circlip snap ring or Lock nut type rear hub.
6. 11 Speed and up (narrower) Chain required. Leading teeth on-shift design for ultra smoothness.
7. Circlip type for maximum compatibility (1.5mm + 1.8mm custom snap rings included), also compatible with lock nut type rear hub.
8. Not compatible with Sturmey Archer SRF-5 (W) 5-speed hub or Brompton BSR 3 speed, but compatible with SRF-5(N) 10 (5x2) speed hub, so 5x7 is possible

Note:

1. The older stock tensioner can only take up to 19t cog, so you will need a 3rd party (e.g. aluminum) tensioner, we have tested with MiniMODs, H&H, BooK, DCCH & Thx4ride (parallelogram derailleur).
2. You will also need the following upgrade parts (Not Included): 5-speed thumb shifter, 11-speed or up Chain.
3. Disclaimer :
   • 75 Unibody Cog Set was based on our pupular X3 Unibody Cog Set (easy DIY 2s --> 3s with most compatible stock parts).
   • But for the 5-speed mod, it will require other 3rd party upgrade parts (the derailleur tensioner system might be hard to adjust for some brands) and a tighter precision requirement on the Brompton rear frame (known to be not so precise since made manually).
   • We will recommend this to be done in our dealer shops, Only order here if no dealer is near and you are very confident with your own technical skillset.