The Surly Big Dummy. Designed to transport a rider and up to 200 pounds of cargo, the Big Dummy retains an extremely smooth and manoeuvrable ride under the heaviest of burdens. 100% Surly Chromoly steel; fork is suspension corrected for 80mmMudguard eyelets and Surly Trip Guides for continuous brake/shift housing or brake hydraulic linesTwo standard bottle mounts and one 3-pack mount on Small frame; three standard bottle mounts and one 3-pack mount on Medium and Large; four 3-pack mounts on the forkIncludes (2) Surly Dummy Rail Collars for a stiffer Dummy Rail/Frame interfaceThe length of the frame requires 2 chains and tandem cables26 x 2.5" maximum tyre clearance; absolutely no limitation on chainring sizes