Schwalbe Marathon Racer 20x1.50 (40-406) HS429 Tire - The most popular recumbent trike tire by far. There is a reason that this tire is the default stock option on so many recumbent trikes. Every tire is a compromise of weight, speed, puncture resistance, and longevity and the Schwalbe Marathon Racer is the best option for the average trike rider.
Avid BB7 Front Disc Brake Kit (pair) - This kit includes everything you need to upgrade your trike's brake system to the best mechanical disc brake system available. Perfect for for any home builds.
Mirrycle Mirror - The Mirrycle Mirror is by far the most popular mirror for recumbent trikes. It is well made, attaches to any 7/8in tube or handlebar and is easily adjustable. This is an essential safety item for anyone riding a recumbent bike or trike on the street.