Originally Posted by
HGR3inOK
The Brompton wheels are designed in conjunction with their support pieces. Aftermarket wheels may result in forces on the support pieces for which the support pieces are not designed.
And, in the USA, putting after-market wheels on a car that don't conform to the manufacturer's specifications for wheels for that vehicle may void the manufacturer's warranty, especially on suspension parts that are not designed for the forces generated by the non-conforming wheels.
This analogy is over the top. The forces on the easy wheels are minimal. None of this should effect the warranty, unless the manufacturer is looking for an out. In the folded position, weight of the Brompton is toward the overhanging front wheel. The X-roller helps and the rack helps too. That is the way it is designed.