We spotted the new Schwalbe Jumbo Jim fat bike tire aboard the new Felt LEBOWSKe electric fat bike, and they say it’s the first appearance of the new tread.
Claimed weight is around 1,040g, which puts it on par or even under the weights of many 26″ downhill mountain bike tires. The tread pattern resembles Schwalbe’s Rocket Ron XC tire, but with a lot more space between the knobs. Sidewall markers indicate it’s got their Pace Star rubber compound for low rolling resistance and good durability. Underneath is the Evo carcass, which offers improved puncture and tear protection, combined with Lite Skin sidewalls. The latter is found more on their cyclocross and road tires and is a thinner, more supple sidewall used to save weight and offer a more compliant ride.
There’s nothing suggesting these are tubeless ready, though, but we suspect it’s a see what the market thinks move and more options may follow. Additional pics below…
Size is 26×4.00.