Hi
@Nicksacco , congrats on that L35 restoration project!
Since you're separating the backhoe, you're right to be looking for ballast. Here is a brief comparison of your liquid options mentioned in this thread:
- Windshield Washer Fluid:
- Very light (just over 8 lbs/gal) and corrosive.
- It's mostly water and alcohol. Alcohol evaporates through the tube / tire over time, leaving water to rust your steel rims.
- RV Antifreeze:
- Very light (around 8 lbs/gal).
- It's not designed for tires, it's designed to not expand in RV pipes. It will turn into a thick slush around 15°F, which can unbalance your tires in relatively mild temperatures.
- Rim Guard:
- The only solution designed specifically tire ballast.
- Heaviest: 11 lbs/gallon, it's the heaviest liquid you can buy.
- Non-Corrosive: It is 100% non-corrosive and will not rust your rims.
- Freeze Proof: It stays fully liquid down to -35°F.
You're correct that you can fit about 29 gallons per tire.
- WW Fluid: 29 gal x 8.2 lbs/gal = ~238 lbs per tire
- Rim Guard: 29 gal x 11.0 lbs/gal = ~319 lbs per tire
By using Rim Guard, you get more than 160 pounds of ballast (both tires) than using a lighter DIY alternative.
You've spent 5 years restoring that tractor, saving a few dollars on a light, corrosive liquid puts your rims at risk. Rim Guard gives you the most weight, the best value per pound, and peace of mind.