Replacement Internal Spring for 64x38 Sterling RV Roller Shade

A replacement internal spring for the reported Sterling ISD21-30 shade is not yet confirmed. The 64×38 dimensions and failure to retract do not establish the manufacturer, mechanism, spring part number or cause of the fault. A spring repair may be possible, but we cannot promise that a particular spring will fit or that it will avoid replacement of the complete shade.

Record the shade label exactly and photograph the label, roller ends, brackets and mechanism. Confirm which measurement is the left-to-right shade width and which is the drop. Measure the exposed roller tube's outside diameter and record the existing spring assembly's length and end shape separately; those measurements are not interchangeable. Have the mechanism assessed before opening a tensioned spring assembly.

If the label confirms an Irvine shade, use Irvine's official replacement-parts guides, which distinguish Slow-Rise and Valu-Line mechanisms. The Slow-Rise chart uses shade width to choose a size only after the system is identified. Our current 1-1/4-inch Slow-Rise spring listing is a reference for the specified 2019-and-newer premium system, not a verified ISD21-30 replacement. Neither the word Sterling nor a 64-inch measurement establishes that application.

Send the identification, measurements and clear photos to our team for comparison before ordering. An exact manufacturer cross-reference for the reported ISD21-30 model has not been recovered, so availability of a matched spring and the appropriate repair remain unconfirmed.