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The best advice I got \\;on cleaning whitewalls, I learned on \\;another thread here. \\; Spray the whitewalls with Wesley's Bleech White (sp. maybe Bleach White). \\; Let soak for less than two minutes. \\; Take a Mr. Clean Magic Eraser (regular or extra \\;strength) and \\;rub sidewalls clean. \\;This works awesome! \\; I get lots of comments about my wide whitewalls on my RK Classic. \\;
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I have tried many other cleaners and brushes \\;in the past that are abrasive. \\; The tip above works much better and \\;requires less energy. \\;
I wash the wheels/tires on my RKC while it is up on my bike jack. That way I can spin the wheels freely and cut down on my cleaning time. I simply use Wesley's Bleach White along with a contoured tire cleaning brush. I do one side completely then flush it clean with cold water before moving to the other side or next wheel. When I am finished the whitewalls look as good as new.
Bleach White and a stiff brush. i clean first with a degreaser (mix a small amount of ammonia in it for heavy duty cleaning), then use the bleach white & brush - you're done.