“RTX 4 hit retail Sept 2018 with four grinds (Full, Mid, Low, XLow) and the sharpest, most tour-authentic Rotex face milling of the line to date. Pick Mid for all-around use, Low/XLow for players who like to open the face. Replaced by RTX ZipCore in 2020, so a strong used-market value now.”

The RTX 4 hit U.S. retail in September 2018 at $139 as, in Cleveland's words, the most tour-authentic wedge it had built to that point. It pared back offset and shrank the profile toward a classic blade shape better players prefer, and paired that with the sharpest Tour Zip grooves and most aggressive Rotex 4 face milling of the line so far, including angled grooves near the toe to hold spin on open-face shots. Cleveland's tour testing measured roughly an extra 250 rpm of spin with more shot-to-shot consistency versus the RTX-3. The headline change was moving to four sole grinds: Full (mid bounce), Mid (V-sole, all-around), Low (C-shape heel/toe relief), and an all-new XLow for tight lies and extreme open-face play. It stayed in the line until the RTX ZipCore replaced it in 2020.

Well-reviewed and 'tour-authentic,' but still a routine two-year refresh sold in volume and replaced on schedule by the RTX ZipCore. No scarcity, no tour-legend status, no collector premium; it is abundant and inexpensive used. A high-quality commodity spin wedge, which the marketing language does not change.

For skilled ball-strikers, low-to-mid handicaps, who want maximum spin, a compact blade look, and grind options (especially Mid for all-around, Low/XLow for opening the face) to shape greenside shots. Not for players needing mishit help; the reduced offset and small profile punish inconsistent contact. Those golfers should use the CBX.

• Retailed September 2018 at $139 per wedge, $10 above the RTX-3.
• Introduced four sole grinds including the all-new XLow, alongside Full, Mid (V-sole), and Low (C-shape).
• Rotex 4 milling was the most aggressive of the line to date, with toe-area angled grooves to hold spin on open-face shots; tour testing showed about +250 rpm vs RTX-3.
• Cleveland reduced offset and shrank the head for a more classic blade profile marketed as its 'most tour-authentic' wedge.
• Lofts spanned 46-64 degrees.

Competed with Titleist Vokey SM7 and TaylorMade Milled Grind 2 in 2018-2019, positioned as the spin-and-value tour option. It succeeded the RTX-3 and was replaced by the RTX ZipCore (2020), which added the low-density core for higher MOI. A modern equivalent is the RTX 6 ZipCore or Vokey SM10.

Private-party 2026 value is roughly $50-$75 for a clean single wedge, holding a touch better than the older RTX-3 given its later vintage and grind variety; premium/rare grinds and finishes (Black Satin, Tour Rack raw) nudge it up. Reconditioned-retail grades run higher and overstate private-seller reality. Groove wear is the main value killer.