Monthly Archives: January 2017

Cage revision

My bidon cage system had a minor improvement recently so I thought I should post the latest version info.

The change was to using clear tubing as insulating protection where the cage contacts the stem (I’d previously used various rubber pads but their attachment wasn’t ideal – no issues in practice but “could do with fixing”). The other components are two aluminum strips (8mm by 3mm), some fixings & two 58mm ID O-rings.
Taking a standard bidon cage & assembling my bits, it’s ready for attaching to a Brompton stem…
Once in place, the system looks like this…

Probably my longest running & most essential “hack”, the system performs perfectly. A bidon is held securely & the system doesn’t move around, although it’s also able to be swung left or right if necessary (e.g. folding the bike with a luggage bag in place or folding the bike for packing). The system is able to be removed readily but I’ve actually never needed to take it off. Of course, there’s bound to be another version at some stage – & I’m thinking 3D-printing could be utilised?

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Monkii revival

Updated – 7/1/17 (refer end of post)

My Brompton bidon cage system is still my favourite but it doesn’t suit someone that wants to use their folded Brompton as a shopping trolley, with handle bars unfolded & a bag on the luggage block – because the cage would foul the bag & regularly removing/installing the cage is best avoided. (Whoops, see update below.) A cage that is readily removable is the Monkii system but after trying one for some time, I’m not keen on 2 aspects of the design. First, I don’t like strapping the bottle to the cage & having to remove the two together when drinking. The killer issue though, is that the Monkii cage can readily be ejected when riding over bumps. So, here’s my attempt at fixing those 2 issues…
Peregrine with the old system… 

 
… & Clarence with the new setup… 

 Here’s a pic of the old & new components… 

 
Recipe: take one Monkii system, remove the strap & cut off the wings & tail of the cage. Drill & countersink the cage spine & attach to a standard cage with some screws & nuts. When the Monkii stem block is being mounted, hook an O-ring under the block. When installing the new “combo cage” to the bike, hook the top of the cage under the O-ring & stretch it up so that the Monkii portion of the cage can be connected to the Monkii stem block. 

 
So, I now have a Monkii system that lets me easily remove/attach the bottle when drinking & won’t become disconnected over bumps – & lets me readily remove the cage when operating in “shopping trolley mode”!

Update: Since using Ralph-e & trying to avoid removing the luggage bag (& disconnecting the battery), I now realise that I can leave my Bidon in the cage system & the bag just pushes the Bidon to the side (as the bag pivots around while folding the front wheel).

2017 Best wishes

The very best of wishes for the New Year to you from the Aussie household. We’ve had a very interesting 2016 year & I’m sure that regular readers of the blog have observed the many outings & happenings of the Brompton family.

The introduction of Ralph-e reminds me that Brompton are also crafting an e-bike so maybe a good time to offer my experience & recommendations?

Accordingly, “a Plea to Mr Brompton…”

I’d like a lightweight mid-drive Pedelec Brompton with torque-sensing BB & on-bike battery storage, easily removable (aircraft-legal, 100Wh module units), but not impinging on luggage capability. I’m also happy to use my local hills for testing of various gearing options, & undertake frequent travel to review in-field scenarios not available to UK residents. (e.g. why wait to get your hot weather testing done?)