This is the FX upgrade to our previous bestseller -- the B3. The B4 features all new high-durability Super Grip seat material to keep you in place, and heavy-duty DuraTech TM ballistic nylon reinforcements to prevent knee brace wear. The seat includes raised O.E.M. logos, just like the TC4. Track-tested by the FX race teams, the B4 is the pro riders’ seat of choice
Heavy-duty grip pattern top material
Improved ballistic material protects against knee brace damage
