Detail 01
Round core wire
The core is round rather than the modern hexagonal type.

Independent shopping perspective
Built around a .010–.046 regular-gauge layout, Fender’s Classic Core 155R electric guitar strings use nickel, ball ends, and round core wire. The round-core approach is intended to give the set a familiar, already-settled response after installation. Fender describes the result as fuller lows, softer highs, and extra give for expressive bending—useful when you want those traits from a regular-gauge set.

Strong match
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
The core is round rather than the modern hexagonal type.
Detail 02
The 155R is Fender’s regular-gauge Classic Core set.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
It is the regular set: .010, .013, .017, .026, .036, and .046.
The strings have ball ends.