(Excerpt from Retrospec) Mantra is our premium fixie/single-speed. Quick response dual braking, sealed-bearing hubs, and dripping with style, Mantra is your go-to for your every commuting, cruising, zipping, coasting, and speeding need. Mantra comes standard with sealed cartridge bearing hubs to keep your bike clean and healthy. Less dampness, water, and grime can get into the delicate parts of your bike when the hubs are sealed. This means less required maintenance and a longer living bicycle. Mantra comes installed on the single-speed side. This is a bike you can ride regularly and quickly and easily transform into a fixed-gear whenever you like. We have very high standards. Every single element that goes anywhere near our bikes undergoes serious scrutiny. The Kenda commuter tires we pick have a unique tread with water dispersion grooves. There is more surface area on these tires and water travels through the channels on the tire. This means you have more traction and better grip on the road but also minimal resistance. The double-wall super deep-V Star rims with a machined braking surface and the always dependable KMC chain ensure a smooth ride.
Big Dummy is a long-tail cargo bike, which means that not only can you haul a serious amount of cargo, different accessories can be added to your Big Dummy frame and deck depending on what you want to carry. Being a dedicated single-piece frame, instead of an add-on to an existing bike, it's stiffer and resistant to torsional flex, which provides a better ride and longer lasting frame than long-tail add-ons. Like all Surly's frames, it's made of their size specific, 4130 CroMoly steel – a tube set engineered for cargo that sports lots of little touches that you've come to love in a Surly, like clearance for big tires and the use of common component sizes. Figure on being able to carry about 200 pounds (90kg) of cargo. The load weight, and how it's loaded, will affect the handling somewhat. Also, plan on using gears, especially as cargo weight increases. This may seem obvious, but as you get comfy with it, you will use your full range of gears as never before. It's suitable to loaded as well as unloaded riding. Bags, deck, rails, and rail collars are all designed to improve on previous offerings and work together to make sure your stuff is transported with safety and stability. It's an unbending interface, which when you're carrying lots of cargo, is a good thing to have. Get creative, and get hauling. If you intend to carry a passenger on your Big Dummy, Surly requires use of their Dummy Rail Collars. These provide a secondary retention system for the rack, as well as stiffen the rack system. These are included with MY17 Big Dummy bikes and frames, as well as available AM for older Big Dummy bikes and frames (compatible with all generations of Big Dummy bikes/frames). In addition, a stoker handlebar set up, found on tandem bicycles, is recommended as well. Make sure to check with seat post manufacturer for stoker handlebar compatibility. If you are planning to carry a child on your Big Dummy, Surly recommends the use of a child seat. They've tested the Maxxi Yepp seat. Yepp makes an adaptor that allows their seat to mount onto Surly's deck. It works well with the Big Dummy. At this time other child seats are not recommended and will void your warranty. Surly is testing other options. Note: keep in mind Big Dummy weight limits when carrying a passenger.
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