Sorry, thought you were asking about the tyres. The rims are from ebay.
Search: 1.9" Beadlock Wheels Rims for SCX10 II 90046 TRX4 HPI Redcat RC Crawler
They look nice but the hardware they supply is made of butter. The head of the screws snap off really easy.
Love it. Very capable. Enjoyed building it to. It was my very first build kit. Never did connect the dig servo or fitted the interior either. Holmes Hobbies motor and HW esc.
It's well scratched up now. Top photo is the high clearance links I fitted. I reformed the links to my liking. DIY drop...