Originally Posted by IndyRC_Racer

Finding some Tamiya parts can be a challenge. Sometimes the parts are a 5 digit number and are easy to find/purchase. Other times they are a 7 digit number and can be found/purchased directly from Tamiya. Often you can find the parts listed for a model at the very end of the instruction manual that came with your car. Sometimes these parts may be listed with Japanese words which can make it more challenging for speakers of other languages.

When I'm having difficulty finding a Tamiya part for one of my cars, I will find the particular model on the TamiyaUsa.com website. When viewing that model you can select the option for spare parts or option parts and usually can find most everything available for the car. Although it can be hit or miss trying to find/buy the individual lettered metal parts bags.

Another good resource for finding parts for Tamiya cars is the tamiyabase.com website. I just used this website to look up the Tamiya TT02 R kit. From there I was able to determine that the black plastic wheel appears to be Tamiya Part# 9335728 or 19335728. I then went back to TamiyaUSA and typed that number into the search box on that website. Those particular plastic wheels(rims) appear to be available directly from TamiyaUSA. Here is a link...

https://www.tamiyausa.com/shop/7-dig...c-wheel-84409/

You can also trying searching through the Tamiya spare part section of their website, but I find that it can be time consuming for me. Maybe there is an easier way to find the 7 digit spares that only come with a few kits. I would be interested to hear if someone has any easier way to find those parts.

Either way, hope this information helps.