Bottle cage for Brompton folding bikes

thingiverse

I've been fed up with the bottle cage options for my Brompton for quite a while now. Nothing really did everything I needed it to do. I don't use the bike for commuting (not very often, anyway), it's mainly used for throwing in the back of the car and taken on days out, weekends away etc. I was previously using an SKS bottle cage that velcro'd on, but I had to remove it every time I folded the bike or else I couldn't lay the bike on its side in the car since it stuck out from the side. I tried a Monkii cage but didn't get along with having to tug the bottle from the bike and then clip it on again after every drink. So, having bought myself a 3D printer just before Christmas, I decided to have a go at designing something that suited my needs. What a folding bike really needs is a folding bottle cage! So, what I came up with is a 2-part solution. A bracket that clamps to the stem on the bike, and a cage that can be clipped onto the bracket in two orientations. One for when riding the bike, and reversed when folded. This means it only adds about 10mm to the width of the bike when folded, and is sturdy enough that if the bike is laid down flat in the car with the stem downwards, it won't break. Requires 2 x M4 16mm hex bolts with nyloc nuts. *** Update *** Since releasing the original version, I've been busy tweaking the design. I've also had the design professionally printed on a HP FusionJet in Nylon (I used a company called Weerg) so I'm now confident that all clearances are spot-on and the clip on/off mechanism works as designed. The result can be seen in the photos on the Brompton CHPT3 (the black & red bike). The original files are still included, the new updated ones have _8v2 suffix. I should point out that I only have access to bikes with the S-Type handlebars, so I don't know how well it will fit on bikes with M/H or P bars. I'd love to know if anyone else out there is using the design, if so, please share some photos! Regards, Lee