How to Measure a Recurve Bow String
Quick answer: recurve bow string length is usually based on the bow’s AMO length. The string is usually shorter than the bow length so the bow reaches the right brace height. The safest starting point is the bow manufacturer’s string recommendation. If the bow has no marking, measure carefully and ask a bow shop if you are not sure.
Bow length vs string length
Bow length and string length are not the same. AMO bow length is a standardized reference, and the string length is shorter so the bow settles into the right brace height. A recurve marked as a 68-inch bow does not use a 68-inch string in the way a beginner might expect.
String length follows bow length and brace height
The correct string length should produce brace height in the maker’s recommended range.
Rule: manufacturer guidance beats generic formulas.
If you are still sorting out the bow size itself, check the bow length guide first:
How to find the correct string length
- Check the bow limb or riser markings.
- Check the manufacturer documentation.
- Measure AMO bow length if markings are missing.
- Measure the old string only if it was known to fit correctly.
- Confirm brace height after installing the string.
If you only have an old string, use it as a reference, not as proof. A stretched or worn string can mislead you.
How to measure an existing recurve string
- Remove the string safely with a bow stringer.
- Lay it flat without stretching it aggressively.
- Measure from loop end to loop end.
- Note the string type or material if you know it.
- Do not assume an old stretched string is the correct length.
Use the loop-to-loop measurement as a check, but still compare it with the bow maker’s guidance.
AMO string length basics
Many recurve strings are several inches shorter than the AMO bow length, but the exact difference depends on the bow design, the string material, and the maker. There is no universal exact formula that fits every recurve. Manufacturer guidance beats a generic rule.
Lancaster Archery notes that a 68-inch AMO string can measure a few inches shorter in practice depending on the bow and material. That is a useful reference point, not a rule to force onto every bow.
Brace height check
The correct string should give you a brace height that falls within the bow maker’s recommended range. Too short or too long a string can create brace-height and tuning problems. Do not shoot if the string does not seat properly in the grooves.
When to replace a recurve bow string
- Frayed strands
- Broken serving
- Damaged loops
- Unknown age or condition
- Poor fit
- String does not seat properly
- After long storage if the condition is questionable
Common mistakes
- Measuring bow tip to tip and buying a string from that number
- Using a string from another bow
- Ignoring brace height
- Using damaged loops
- Stretching a string hard while measuring
- Confusing compound bow strings with recurve strings
Safety notes
- Use a bow stringer for stringing and unstringing.
- Inspect limb tips and string grooves.
- Do not dry fire.
- Stop if the string slips, twists, or seats poorly.
- Ask a bow shop if you are unsure.
Related guides
References
- Lancaster Archery Supply: How to Choose the Right Recurve/Longbow String
- Lancaster Archery Supply: What size recurve bow is right for me?
- World Archery: Recurve equipment overview
- Archery360: How to Order a Recurve Bowstring
- Hoyt Traditional Recurve manual
Frequently asked questions
How do I know what string length my recurve bow needs?
Check the bow markings or the maker’s manual first. If the bow is unmarked, use the AMO bow length as the starting point and confirm with a shop if needed.
Is recurve bow string length the same as bow length?
No. The string is usually shorter than the AMO bow length.
What does AMO string length mean?
It is the standardized string length used to match a recurve or longbow to the correct string size.
Can I measure my old bow string?
Yes, if it was known to fit well. Measure loop to loop without stretching it hard, then compare it with the maker’s recommendation.
Why is my recurve string shorter than my bow?
The shorter string helps the bow reach the correct brace height and working shape.
What happens if the string is too short?
The brace height can be wrong, the bow can feel harsh, and fit or tuning problems can show up.
Should beginners ask a bow shop for string fitting?
Yes. A shop can confirm the string size, fit, and brace height before you waste time on the wrong part.