5 Speed Brompton A/C Line MiniMODs upgrade kit Full set

Aluminum alloy CNC machined lightweight tensioner arms, derailleur, fixture, and thumb shifter. Compatible with A/C Line or Electric P Line frame (P/T Line version is in other listings). Comes with X7 advanced Cog Set on stock wheelset for 5-speed 11-25T (#X5AdvancedCogSet). The largest cog is 25T (vs. the original max 15T on A/C Line). Titanium Tensioner Spring. CNC machined advanced-parallelogram derailleur (spring-activated main body, 2 Jockey wheels, fixture). Note : This modification is more difficult than the rather easy "plug and play". (please expect some more time and patience to finetune the result). Do not recommend this as a DIY project, please consult your LBS mechanic before ordering.