With the introduction of the T and P-Line, there are even more Brompton gearing configuration to choose from. We review them and evaluate respective speed and climbing performance.

Brompton 44T Chainring and Guard assy (https://amzn.to/3oxrLAG)
Brompton 50T Chainring and Guard assy (https://amzn.to/3kwbb1x)
Brompton 54T Chainring and Guard assy (https://amzn.to/3jElMGB)

00:00 Introduction
00:25 Bicycle Drivetrain
01:33 Hybrid / Road / City Bike gear range
02:33 Brompton Gear range
02:40 1 Speed
03:01 2 Speed
03:19 3 Speed
03:47 4 Speed
04:16 6 Speed
04:52 Commuting Speed
05:35 Climbing Performance
07:17 Summary

Reference:
Bioastronautics data book, 2nd edition, NASA-SP-3006 [https://ntrs.nasa.gov/citations/19730...]

Copyrights
- Music: The Day is Close - The 126ers
- Video by cottonbro from Pexels [man-biking-upside-down]
- VIdeo by Brompton Bicycles T-Line [   • 7.45kg : The Story of Brompton T Line  ]
- VIdeo by Brompton Bicycles 4 Speed Gearing [   • How to factory reset the Brompton adv...  ]
- Photo Ashley Pomeroy [Sturmey-Archer hub]

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