Need front tires on an 08' E350 w/ Sport Package and was considering General RT43's as they are non-directional and can be rotated side-to-side. The sport package currently uses:
F245-40-18 Diameter 25.7"
R265-35-18 Diameter 25.3"

Will the diameter difference cause a problem with ABS or a vehicle speed sensor?

Can I use 245-40-18 on all four corners when the rear tires need to be replaced and use the current wider rear rims? The RT43's aren't made in the R265-35-18. The load index is the same on F & R @ 97 and the RT43's are offered in a V rating.

Thanks!!!

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