I'm new to the forum, and I need the 4mm adapter for the wheels on the dagu wild thumper... I know they sell them with the adapters... but I need only the adapters...
Those Tamiya adapters won’t work without some modification. It would help if the 12mm hex is the same size as the WT hole but I can’t say. It looks like it would take some shenanigans to get the grub screw tightened onto the motor shaft even if it does fit.
As you are in Brazil, S&H is probably berserk, not to mention robotshop’s oh-so-kind $25 minimum order mandate. I’ve been told if you contact Claudia from Dagu, she can work wonders. I personally have no experience with her but I’m betting that will be the next thing you’ll hear if I don’t say it.