First Look: Fox Factory E-Bike Specific Suspension

THE FOX VERSION OF E-BIKE-SPECIFIC SUSPENSION

Over the last year we’ve been seeing more bikes listing “e-bike suspension” on the spec sheet, which raised the question, ‘What exactly does ‘e-bike-specific’ mean?” In some cases, it might just mean a graphic treatment; for others, it could be a thicker crown and a sticker that has an “E” on it. Thankfully, after a few phone calls, we found out that for Fox, the idea of e-bike suspension is actually given some added consideration.

Of course, given their long history of producing top-line suspension parts for motorcycles dating back to the late ’70s, Fox has been a mainstay in the suspension game long before mountain bikes came along. 

Out of their catalog of 12 different mountain bike forks, three are set aside as “e-bike-specific.” Between those three, they break the offerings into three categories that reflect contemporary off-road parlance—Trail, All Mountain, and Enduro—with ranges of 140mm to 180mm of travel, and 34-, 36- and 38mm stanchion diameters respectively. All three of the air forks feature the Kashima coating for smoother fork action.

THE DIFFERENCES

The difference you’ll find in the e-stuff is a thicker crown to accommodate the impacts owing to the extra torque you get from the motor. The torque from the motor actually puts more pressure on the head tube area. The thicker crowns and lower leg arches help to compensate for that added torque and pressure. 

36 & 38 Floating Axle
FLOATING AXLE : Floating axles might look similar to other axles, but in fact they offer a distinct performance advantage due to their unique ability to match the exact width of the fork’s wheel mounting surface precisely to the front hub flange spacing, thus creating perfect chassis alignment and eliminating unwanted friction between the upper and lower fork legs. Floating axles provide much smoother suspension movement throughout the entire range of the fork’s travel, notably improving sensitivity and overall ride quality. 

 

Fox told us that on top of that they also changed the valving to allow for the oil to properly reach the upper part of the lower fork legs, which in turn lubricates the foam rings and bushings as intended. This e-bike-specific valving is working in part with Fox’s new lower-leg bleeders for pressure equalization. This allows the fork to properly go through all the travel with the intended response and characteristics.

While the 34mm stanchions found on the trail fork are stout enough for the majority of recreational riders, heavier and faster riders have noticed more front-end flex with them versus the stouter 36 and 38mm forks. Among other features, for 2021 the latter two also come with a new mudguard/fender, as well as Fox’s proprietary “floating axle.”  

The one caveat we would offer for anyone eyeing a Fox fork is that they represent the epitome of modern suspension technology. As such, with all the features comes added levels of complications in setting them up.  Between the high-/low-speed and compression/rebound adjustments, there is a total of 48 different adjustments (via clickers) that can be made. Thankfully, Fox has probably done the best job imaginable to identify what each adjuster is and what it does. 

Style: Trail, All-mountain and Enduro 

Price range: $789-$1249 between multiple ranges from low end “Performance” to high end “Factory Kashima Coated”.

www.ridefox.com


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