You can purchase universal lawnmower wheels for replacement in 8 and 6-inch sizes.
The 8-inch wheels are UNIVERSAL 8″ REPLACEMENT LAWNMOWER WHEEL
The 6-inch wheels are UNIVERSAL 6″ REPLACEMENT LAWNMOWER WHEEL
There are various sizes available.
Please note all parts listed are personally picked and I have gone to the trouble of only selecting genuine parts where possible.
Leave me a comment on my Youtube channel if you can’t find a part. Just post your question in the comments section of any video and I will get back to you.
You can find my channel here https://www.youtube.com/c/MowerMan