What’s the best accessories that works while the bike is folded and isn’t heavy?
 

I'm looking for very compact accessories to not make the bike heavier and doesn't need to be taken off or adjusted while folded. Things like lights, and bags and such. Anyone have recommendations?

I have Reelight SL120s on my Mu XL Sport. They do not affect the fold. See:
WaterBottle etc
Please note that the ones at ThorUSA have the extended bracket for use with disc brakes. The ones on my Mu XL Sport have the standard bracket.

-HANK RYAN-
Norman, Oklahoma USA

Helium filled balloon ..



Front wheel hub Dynamo + Busch & Muller Eyc and Line tech flat taillights wired to the hub dynamo ..

this is probably the lightest Hub dynamo ever made SON XS

Busch & Müller: LUMOTEC IQ2 Eyc

Busch & Müller: TOPLIGHT Line plus

(or the even smaller Busch & Müller: TOPLIGHT Mini )

They replace the reflectors on my Brompton and are not much larger than the reflectors they supplanted ..

Knog Frog headlight and taillight. Super tiny and does the job on city streets. When riding, nothing beats a Timbuk2 bike messenger bag. That cross strap makes sure it stays in place on your back while riding and folding, plus you can design one to match your bike. Sks fenders are the way to go on sub 20"wheels.

The tiny little lights made by sunlite for $12 a pair on Amazon,white light front and red rear.Strap to frame ,handlebars with velcro and blink or steady light.Just incase you get caught out after dark.

I got this water bottle cage for my Flyby:
Topeak Shuttle Waterbottle Cage AL at REI.com

Not sure which folder you have, but I've not had much of a problem adding stuff to my folder....I use a small fabric bag that collapses when empty so it just squishes when the frame folds. The water bottle cage and pump don't get in the way either. I use a light that mounts on the rear fork where there is no folding interference. The front light is clipped to the bag. Lots of brands would work. I am using a Cateye 7 Velo speedometer which also works pretty well and does not interfere with folding