The TiLite ZRA. Accept No (L)imitations. WHY TITANIUM? Reason No. 1: Titanium Absorbs Vibration Reason No. 2: TiLite Titanium Wont Break Reason No. 3: Titanium has the Highest Strength-to-Weight Ratio of Any Metal on Earth Reason No. 4: TiLite Custom Builds its Wheelchairs INNOVATION. The Z's 1.25" Mono-Tube frame is 20% lighter than its predecessor but retains titanium's 44% strength advantage over 7000 series aluminum. Tru-Fit System: Reduces the number of holes in the frame, improving durability. Allows for easy adjustment and reduces set-up time. Adjustable Camber Mount incorporates TiLite's Tru-Fit system with up to 3.5" of Rear Seat Height adjustment. ZRAs SpeedLoader Adjustable Front Caster Housing (patent pending) quickly and accurately adjusts Fork Angle in 1? Increments. SlipStream Single-Sided Fork with Integrated Bumper (patent pending). Performance 5-Spoke Soft Roll Wheel weighs just 1.6 ounces, shaving 40% from the weight of the original, 3-Spoke Wheel. TiShaft back release bar makes folding and unfolding the backrest easy from any angle.