Yes, even Rose are now offering a fat bike. This is The Tusker. The frame accommodates 4in wide tyres with a 100mm bottom bracket shell and 170mm rear axle. It uses horizontal dropouts so it can be setup with gears or singlespeed. They’ll be offering a number of builds with the choice of suspension or rigid forks. Rose reckon a complete bike should weigh between 14 and 15kg.
More at www.rosebikes.co.uk