After one week of testing, I am back with my results!
Strings and yoyos used:
- Zipline Hulkenstein (green) on a YYF Shutter
- Homebrew string from @Kieran (pink) on a TP Houska Dry
- Buddha XL (red) on a Replay Pro
I usually pre-stretch my strings before tying a loop, but for the sake of the experiment I did not do this. As such, I did not hold the strings tight during the first measurement, but they are accurate within a 1/4 inch.
I played approx. 4 hours with each string/yoyo throughout the week. The pink and red strings are very similar in feel and thickness, whereas the blended color Zipline string is much thinner, and seemed to have less bounce to it right from the start. Noticing this, I hypothesized that the green Zipline string would be more resistant to stretching over time, being a generally longer lasting string than bulk poly.
To get a variation of results from my two similar strings, I played one exclusively indoors (pink) and the other I used exclusively at my work in a machine shop (red). I thought the dirt and oil likely to get on my string at work could potentially yield different results.
The red string, starting at approx 45 inches stretched almost 3 inches by the end of the week.
The pink string, also starting at approx 45 inches, stretched just over 2 inches by the end of the week.
And lastly the green string, starting at approx 44 inches, stretched only just over an inch by the end of the week. I feel it is also worth mentioning the green string could still be played longer, and could potentially stretch some more by the end of another week of play.
In conclusion, the Zipline string held up better throughout a week of play, and stretched the least distance. The bulk poly Buddha XL string would probably have gotten changed already if I wasn’t doing this little experiment, having stretched the most over the course of the week.