Really fatSpecialized Fatboy with 4.8" wide tyres

Peter Nilges

 · 12.01.2014

Really fat: Specialized Fatboy with 4.8" wide tyresPhoto: Georg Grieshaber
Really fat: Specialized Fatboy with 4.8" wide tyres
The Specialized Fatboy Expert is the monster among fat bikes with built-in free line choice. And it's surprisingly good on the throttle.

We were amazed when the Fatboy rolled into the editorial office with gigantic 4.8-inch wheels on 90-millimetre-wide rims. What balloons! In comparison, the 4.0 tyres of the other two Fattys seem almost dainty. Anyone travelling on the attractively priced Fatboy doesn't have to worry about two things. Firstly, the traction and secondly, the publicity. Wherever the Fatboy appears, people crane their necks. The extra-wide Surly tyres (Specialized's own 4.8" tyres in the series) weigh 250 grams more than a 4.0 and come to 1.5 kilos each. Due to the weight and the slightly longer chainstays, the Fatboy rides a little slower and not quite as playful compared to the super-light, but also twice as expensive Salsa. Nevertheless, the Fatboy is a world better on the throttle than you would expect.


Conclusion: the monster among fatbikes with built-in free line choice.


PLUS Gigantic tyre volume ensures incredible traction, solid equipment with good price/performance ratio
MINUS Narrow 700 mm handlebars, no thru axles; slightly more nervous steering compared to Salsa and Sandman

This picture shows just how wide 26x4.8 inch tyres are. The tyre measures 115 millimetres in the Fatboy and even towers over thick 29ers in diameter.Photo: Georg GrieshaberThis picture shows just how wide 26x4.8 inch tyres are. The tyre measures 115 millimetres in the Fatboy and even towers over thick 29ers in diameter.The maximum milled rim keeps the weight low despite the 90 millimetre width. There is no hollow chamber. The inner tube is located directly behind the red rim tape.Photo: Georg GrieshaberThe maximum milled rim keeps the weight low despite the 90 millimetre width. There is no hollow chamber. The inner tube is located directly behind the red rim tape.

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