Don't think you can get Big Apples for the ISO 349 size; I think they're for the smaller ones used on Dahon curve etc...314? 310?
Regarding wheels - you can got up to 19-369 size (Moulton 17" as long as you have skinny tyres). Whether you can still use the standard fenders/mudguards as well I do not know.
Simon Koorn on the BromptonTalk mailing list puts it thus:
For a narrow tyres one can/should convert to a (narrow) rim that is
slightly bigger in diameter, this has two benefits:
• the bracket height will not be reduced (that much) and thus ensures
safe cornering and pedals staying clear of the ground.
• one can use shorter, less flexible, more sophisticated and powerful
brake-callipers.
Below is a list of sizes that virtually have no effect on the bottom-
bracket height.
In theory other sizes are possible as well (20-382) but having from a
new and non-ETRTO rimsize will make it hard get any tyres made for
it in small/medium quantities.
All the sizes below are available, be it sometimes very very very
hard to find, and they all fit the Brompton rearframe (be it only
just in case of anything over the Brompton size of 422mm, sometimes
it even is hard to fit tyres with slightly to much rubber/thick
profile like the Schwalbe Marathons)
37-349 349mm + 2*37mm Å ¿422mm (16 x 1 3/8)
35-355 355mm + 2*34mm Å ¿422mm (18 x 1.35)
35-356 356mm + 2*34mm Å ¿423mm (16 x 1.35) (nowadays very much
unused ETRTO rimsize)
32-357 357mm + 2*32mm Å ¿421mm (17 x 1 1/4)
28-369 369mm + 2*28mm Å ¿425mm (17 x 1 1/8) available size for Moulton
26-369 369mm + 2*26mm Å ¿421mm (17 x 1) alternative size for Moulton
Simon
I just ordered the other type of stem extender. It means I can swap out the bars easily without having to take off the lever/grips etc.
I have also ordered some skinnier AeroHeaD rims and 19mm Primo Champ tyres so it will look like those Moulton Speeds in
Sesamecrunch's Moulton build thread.
You must get the dog basket!
