Brompton’s naming conventions are a bit confusing, and have changed several times, so I thought I’d put together a simple table to show you what upgrades are possible on the different models:
| A and C Line All Older Models apart from X | All conversions are possible, by replacing the rear triangle and/or forks |
| P and T Line Older X Superlight Models | Hub gear and belt drive are possible by modifying the titanium rear triangle All conversions are possible, by replacing the rear triangle and/or forks |
| G Line | Hub gear and belt drive are possible |
| Electric | Hub gear, rear disc brake and belt drive are possible Wheel size change is possible with a front V-brake instead of disc |