EXT Ferro EMX Air Fork | 205mm Travel, Drop Crown

The EXT Ferro fork is a 205mm air-sprung, upside down fork for small E-motos, with 36mm chrome moly stanchions and a 3-way adjustable cartridge. It fits the Surron Light Bee, Talaria MX3 and MX4, and Eride Pro SS 2.0 and SS 3.0 with the right spacer or adaptor.

Specs:

• 205mm travel, 44mm offset, upside down dual crown layout with a dedicated triple clamp.
• 36mm stanchions in heat-treated 42CrMo4 chrome moly steel with Superfinish surface treatment - low friction, high stiffness.
• 7000 series aluminum upper legs.
• HS3 hybrid air spring: two positive air chambers plus one large self-equalizing negative chamber - support around sag, sensitive off the top, protected at bottom-out.
• 3-way high-flow cartridge with independent high-speed compression, low-speed compression, and rebound.
• External pressure release valves on both legs.
• 20mm twin hexagonal floating axle, boost hub spacing - opens up aftermarket wheel choices.
• 200mm post mount brake.
• Drop crown version for extra tire clearance; works with the stock fender.
• 4000g.

Fits these models:

• Surron Light Bee (with boost rotor spacer; all model years; also sold as Segway X160 / X260)
• Talaria MX3 (with boost rotor spacer)
• Talaria MX4 (with boost rotor spacer)
• Eride Pro SS 2.0 (with boost rotor spacer)
• Eride Pro SS 3.0 (with EXT brake adaptor)
• Ventus One+ (with boost rotor spacer)
• Rawr Mantis X (with boost rotor spacer)

Boost rotor spacer: the Ferro uses boost hub spacing, so the stock rotor needs a spacer to line up with the caliper. The Eride Pro SS 3.0 uses EXT's brake adaptor instead.

Does NOT fit: Talaria MX5, Surron LB2

EXT Ferro Fork FAQ

Do I need anything else to install it?

Yes. You need an SS001 bearing race and a lower head tube bearing (usually a 32906). Most bikes also need a boost rotor spacer, and newer DOT brake systems may need a brake adapter.

Does it fit the Talaria MX5?

No. EXT lists the MX5 as not compatible with this fork.

Does it fit the Eride Pro SR?

EXT says it will physically fit the SR, but an SR install is not covered by EXT's warranty. It is listed for the SS 2.0 and SS 3.0.

How do I set air pressure?

EXT's chart starts from rider weight on a bike of about 150 pounds, like the Surron Light Bee. On a heavier bike, add the weight difference to your rider weight before reading the chart.

Air or coil?

Air. The HS3 system uses two positive chambers and one negative chamber, so spring rate changes with a shock pump instead of a spring swap.

Ships from USA!