# Noob Question **URL:** \ **Category:** SON240sx Automotive\ **Created:** [January 2, 2005, 1:44pm UTC](https://forums.speedlife.net/t/noob-question/82757 "2005-01-02T13:44:57Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Stock240](https://avatars.discourse-cdn.com/v4/letter/s/a698b9/32.png) [@Stock240](https://forums.speedlife.net/u/Stock240)\ **Post date:** [January 2, 2005, 1:44pm UTC](https://forums.speedlife.net/t/noob-question/82757/1 "2005-01-02T13:44:57Z")
Don’t flame on me too bad. 205/55/16 What do they mean??? And what would a good wheel setup be for a 240??? ---
**Author:** ![blisterd\_nuts](https://avatars.discourse-cdn.com/v4/letter/b/f475e1/32.png) [@blisterd\_nuts](https://forums.speedlife.net/u/blisterd_nuts)\ **Post date:** [January 2, 2005, 2:02pm UTC](https://forums.speedlife.net/t/noob-question/82757/2 "2005-01-02T14:02:27Z")
205-width 55-thread size… ?? 16-rim size and if you would like to find good size of rims/offsets you may look at How too’s and FAQ in this forum. ---
**Author:** ![sidewaze](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sidewaze/32/5497_2.png) [@sidewaze](https://forums.speedlife.net/u/sidewaze)\ **Post date:** [January 2, 2005, 2:03pm UTC](https://forums.speedlife.net/t/noob-question/82757/3 "2005-01-02T14:03:37Z")
Hey man. The 55 is the height of the tire from the rim. Easy 8) ---
**Author:** ![blisterd\_nuts](https://avatars.discourse-cdn.com/v4/letter/b/f475e1/32.png) [@blisterd\_nuts](https://forums.speedlife.net/u/blisterd_nuts)\ **Post date:** [January 2, 2005, 2:04pm UTC](https://forums.speedlife.net/t/noob-question/82757/4 "2005-01-02T14:04:18Z")
^^^ what he said. i couldnt’ describe it. ---
**Author:** ![Uniac](https://avatars.discourse-cdn.com/v4/letter/u/34f0e0/32.png) [@Uniac](https://forums.speedlife.net/u/Uniac)\ **Post date:** [January 2, 2005, 2:04pm UTC](https://forums.speedlife.net/t/noob-question/82757/5 "2005-01-02T14:04:30Z")
first number, tread size in MM, second number, aspect raito of the tire in % of the tread size. so 55% of 205mm = side wall height…lower the % lower the sidewall height. 16 referes to rim size. anyone can explain this more clearly if they like ---
**Author:** ![BenG](https://avatars.discourse-cdn.com/v4/letter/b/b3f665/32.png) [@BenG](https://forums.speedlife.net/u/BenG)\ **Post date:** [January 3, 2005, 9:41am UTC](https://forums.speedlife.net/t/noob-question/82757/6 "2005-01-03T09:41:48Z")
205/55/16 is what they said… 205 is the WIDTH of the tread in millimetres 55 is the height of the sidewall of the tire expressed as a percentage of treadwidth (ie sidewall height is 55% of 205mm) 16 is the rim size. Don’t ask why there are different measurement units (mm and inches) used at the same time… i never figured out why it’s like that ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [January 3, 2005, 12:24pm UTC](https://forums.speedlife.net/t/noob-question/82757/7 "2005-01-03T12:24:46Z")
[http://www.tirerack.com/tires/tiretech/general/size\_information.jsp](http://www.tirerack.com/tires/tiretech/general/size_information.jsp) /thread