Rear Wheel Weights for L2502 with R14's?

[Tonka]

On the L2502 with R14 rear tires, 15-19.5, the wheels have no provisions for mounting wheel weights. Is there a way to mount wheel weights on these wheels? Does anyone offer an adaptor or mounting system to add wheel weights?
Seems odd that the R1 wheels have provisions for wheel weights and the R14's do not.

 

[North Idaho Wolfman]

Fill the tires

 

[Tonka]

Fill the tires

75% filled with water. Doesn't really freeze here and its inside at night. Alittle more weight would be nice. Also has a 72" box scraper (404lbs) on it most of the time and all the time when there's heavy loader work to be done. Going to add 300ish lbs to the box scraper. Just thought I'd ask if there was a wheel weight option. Full buckets of AB are heavy. Then add some uneven terrain and more ballast would be appreciated.