Originally Posted by
Winfried
There could be a small market for affordable 135 OLD rear triangles in steel, but it's still a pricey change if you include the IGH and the time spent by the LBS to put things together.
At this point, for those not owning a Brompton already, the more affordable solution seems to be just ordering a new Brompton from Kinetics.
You can order a 135mm rear triangle from kinetics w/o a Brompton hanging to it:
Brompton Forks & Rear Frames ? Kinetics
Depending on your abilities, your existing lot of parts in a shed and the love to your existing Brompton it may be a better deal or not, compared to ordering a complete bike.