Knuckle Breaker is a Aero Mini 4WD car on the Super X and Super XX chassis. Tamiya has released it 4 times, from Standard Japan Cup Press model (8 Sep 1998) to Blue Special (item 19620, 18 Sep 2010). Every version is below with its box art, item number and release date, so you know which box you're looking at.


| Box · car | Item no. | Version | Released | |
|---|---|---|---|---|
![]() ![]() | — | Standard Japan Cup Press model white body · black frame · small wheels | 8 Sep 1998 | Price & detailsOpen |
![]() ![]() | 19604 | Standard white body · brown gray frame · small wheels | 8 Sep 1998 | Price & detailsOpen |
![]() ![]() | 19608 | Black Special black smoke body · black smoke frame · small wheels | 16 Mar 1999 | Price & detailsOpen |
![]() ![]() | 19620 | Blue Special clear blue body · dark blue frame · small wheels | 18 Sep 2010 | Price & detailsOpen |
Names, item numbers and dates: Tamiya's listings and the Mini 4WD Wiki, used under CC BY-SA 3.0, rearranged and extended by mini4izad. Product photos and box art are © Tamiya, shown as small previews and taken from the wiki, where they carry a fair-use tag; they are not covered by CC BY-SA. If you own an image here and want it removed, email hello@mini4izad.com and it comes down. The full-size photos, the price guide and your collection tracker are in the Kit Finder.
Tamiya and Mini 4WD product images are © Tamiya. Data from the Mini 4WD Wiki (CC BY-SA 3.0). Removal requests: hello@mini4izad.com.