Kim’s Kilo-Graham Fat Bike

Goals

  • Cruiser handling
  • Upright Rider Position
  • Rack Mounts
  • Truss Fork
  • All-Season Fat Bike

Comments

Fat bikes are no longer being used only as a specialty bike. Many riders are seeing benefits from the big tires all year long. Fat tires are very stable, with lots of traction, and a good amount of cushion. Yes, they come with a weight penalty, but for all around cruising they work amazing. Plus, in Northern Michigan they open up the opportunity to do some beach riding, and of course the winter riding they are known for.

When my Dad asked me about building him a fat bike, it was a no-brainer. A fat bike fits what he wants to do really well. Cruise dirt roads, which are often sandy in Northern Michigan, Check. Ride on the beach, Check. Go bike packing with me, with rack mounts and a frame bag from Barking Bear Bagworks, Check. Hit the trails, most of which are flowing singletrack, Check.

To achieve the comfortable cruiser-ish fit I started with a large Surly Pugsley geometry and tweaked it. A taller headtube was used to move the rider position upright. The ST angle was dropped 2 degrees to move the riders weight back. This bike also features a truss fork to provide a smoother ride. Some Jones H bar’s and a Cane Creek Thudbuster seatpost might also be in this bikes future.

Comments (2)

    • Hi Bil,

      The truss fork is designed to be a rigid “suspension” fork. The goal of the design is to provide a smoother ride than a traditional unicorwn, with less flex back under braking, and less twist from steering. I’ve built a few now and I’m getting close to a design that achieves all three of these things; so far all the forks I have done have achieved the second two and some of the first, but I think a more supple ride can be achieved. Im close to finding the sweet spot for tube diameter and wall thickness to have a more supple ride while still being a safe and durable fork.

      In my opinion the fork makes a lot of sense for fat bikes. The fat tires already provide a lot of cushion and small bump absorption. With the addition of the truss you get a little more cushion. Also, the standard rigid forks on fat bikes seem to have a lot of twist during steering, possibly from the wider axle and greater tire traction. The truss seems to significantly reduce this issue.

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