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This Brompton roller wheel was discontinued in 2016 and replaced by the new slimmer wheels which are available as a set of two - see the accessories tab - QROLSET-LE - this is compatible with older bikes.
|Note: Discontinued / replaced along with the introduction of 2017 model Bromptons|
|As standard Brompton now use new rollers - QROLSET-LE (click here), which roll better than the old QROLM wheels and are about equvalent to the half Eazy Wheel set (for Brompton bikes without a rack). These are compatible with all older Brompton models.|
The Brompton rear frame / triangle has one of these roller wheels on each side. When the bike is folded these aid in ballancing the bike and allowing it to be rolled across smooth surfaces.
Unfortunately, over time these can deteriorate due to the bashing they sometimes receive! In fact, should your Brompton take a really heavy landing, they are designed to fold / break to avoid damage occurring to the frame (in a similar way to modern car bumpers folding under impact)
The roller wheels are held in place by an Allen key bolt (in earlier versions this was a flat headed screwdriver bolt). Inside the wheel to allow friction free movement is a large washer. Neither of these are included, but they are available under another part code - QROLMBOLT.
Note: New Brompton bikes made in 2016 and onwards have a new design of roller wheel (you can find them here). The new wheels are compatible with older bikes.
Brompton Q part code: QROLM
Brompton part number: 9038046