# Polycarbonate plastic help

**URL:** <https://forums.yoyoexpert.com/t/polycarbonate-plastic-help/43124>\
**Category:** Yo-Yo Mods and Maintenance\
**Created:** [September 23, 2012, 2:35pm UTC](https://forums.yoyoexpert.com/t/polycarbonate-plastic-help/43124 "2012-09-23T14:35:48Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![rasengan-00](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/rasengan-00/32/281_2.png) [@rasengan-00](https://forums.yoyoexpert.com/u/rasengan-00)\
**Post date:** [September 23, 2012, 2:35pm UTC](https://forums.yoyoexpert.com/t/polycarbonate-plastic-help/43124/1 "2012-09-23T14:35:48Z")

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Hey guys I just want to know if the polycarbonate plastic on most yoyojam yoyos (for example the DM2, Micro Mo) crack in cold weather when I say cold I mean -10°C cold maximum.

I really need your help with this thanks

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**Author:** ![anonyo](https://avatars.discourse-cdn.com/v4/letter/a/8baadc/32.png) [@anonyo](https://forums.yoyoexpert.com/u/anonyo)\
**Post date:** [September 23, 2012, 4:02pm UTC](https://forums.yoyoexpert.com/t/polycarbonate-plastic-help/43124/2 "2012-09-23T16:02:23Z")

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crack on their own? I doubt it. If you bang it on something them sure the cold can make it brittle.  
Nothing bad on YYJ’s part.

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**Author:** ![rasengan-00](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/rasengan-00/32/281_2.png) [@rasengan-00](https://forums.yoyoexpert.com/u/rasengan-00)\
**Post date:** [September 23, 2012, 4:15pm UTC](https://forums.yoyoexpert.com/t/polycarbonate-plastic-help/43124/3 "2012-09-23T16:15:46Z")

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But does the plastic crack after I go from an outdoor cold for example -5°C to a normal room temperature around 20°C ?

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**Author:** ![jhb8426](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jhb8426/32/631_2.png) [@jhb8426](https://forums.yoyoexpert.com/u/jhb8426)\
**Post date:** [September 23, 2012, 9:00pm UTC](https://forums.yoyoexpert.com/t/polycarbonate-plastic-help/43124/4 "2012-09-23T21:00:05Z")

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Probably not, as long as you let it come up to temperature gradually. I’ve carried mine in a foam case in the car, or in my briefcase and brought them into a warm building w/no problems. So transportation should not be an issue. I have never played them outside where they would get extremely cold, then bring them in a warm place.

BTW - I live in MN where the winter temps usually run 0 - 30 deg F., Some colder days run down to -25 to -30 deg F. (Too lazy to convert)