Dunlop’s CX 200 OS combines a 105 in², 677 cm² head with a 21.5 mm beam. Its official specifications checked on October 18, 2026 list 290 g unstrung, a 325 mm unstrung balance, 27-inch length and 16×19. It is a useful reminder to inspect beam and mass when shopping under the OS label.
Tecnifibre’s FIRE 260 OS makes a revealing comparison. Its manufacturer’s specification table lists 110 in², 710 cm², 260 g unstrung and a 24.5–25–24.5 mm beam. The CX has 5 in² less listed area, 30 g more mass and a thinner beam. Both names contain OS, yet they package different choices.
Tennis Warehouse’s selection guide discusses the larger hitting area of a larger head alongside separate sections on mass, balance, stiffness and swingweight. Head area describes one part of the contact space; moving the complete racquet also involves other design choices and its setup. That gives players a reason to compare combinations within the same broad category.
Write down the problem you want to address first. A contact that becomes uncertain when stretched wide calls for a different demo task from preparation that is late on a fast return. Use wide feeds for the first question and compact returns for the second. Record them separately so the decision goes beyond a first impression of head size.
Record the actual complete playing mass during the demo. The published 290 g and 260 g refer to frames before strings; the strings and overgrip in the borrowed racquet help describe what you are holding. Similar string models, gauges and use histories make the frame comparison easier to interpret.
The 21.5 mm figure describes beam width. Dunlop lists stiffness separately as RA 65. Evaluate contact response at your normal impact positions and setup rather than converting thickness into a comfort or injury-prevention promise. If a particular situation feels demanding on the arm, note its conditions and consider the weight and string choices together.
Use separate columns for head area, unstrung mass, length, beam and pattern, followed by observations on stretched contact, quick return preparation and normal rally depth. Choosing CX 200 OS means choosing the 105 in², 290 g, 21.5 mm combination. Its usefulness depends on how that combination addresses your contact problem.
