Surly Big Dummy Rail Collars Bags which can be handy depending

which can be handy depending on terrain

It has plenty of braze-ons so you can customize how you secure your cargo…or just light your bike up like the space station

Weight: 89g with Chain Spotter

we recommend using TACX  Dynamic Assembly Compound with carbon fibre components

Surly Big Dummy Rail Collars Bags which can be handy dependingSURLY BIG DUMMY RAIL COLLARS These tiny little pieces of hardware are designed to vastly improve the overall performance of your Surly Big Dummy. These simple clamps are designed to strengthen the interface between Surly Dummy Rails and the lower longtail frame. Cool huh? Please see the attached resource below for more info instructions.