[AuburnRyan]

According to the internet (below) - but is anyone having issues with leaks etc. I'm not planning on yearly maintainence, but will do what's necessary to avoid issues. i.e. when tires are already off for any reason.

" Two & Three piece modular wheels require periodic maintenance. You'll want to work out your own maintenance schedule, but here's an example of what the manufacturer recommends.
Each Season disassemble, thoroughly inspect, clean, re-seal, and re-torque each wheel:
Replace wheel bolts each season
Wheel Bolt Torque:
1/4" bolts 15 ft/lbs. or 180 in./lbs
5/16" bolts 20 ft/lbs.
After thoroughly cleaning all mating surfaces with an appropriate cleaner, add a thin skim coat of silicone sealant to these surfaces, assemble wheel and torque bolts to recommended torque
Install a new valve stem
Add a thick coat of silicone sealant to the drop center area of the wheel and let it cure for 24 hours before initial use



Below is an example of cracking which can occur on wheels which don't support the back rim half with the center. This wheel happens to be a Dura-lite wheel.

Modular Wheel Leak Detection

So your tires keep going flat, before you blame those leaky slicks, check your wheels for leaks.
Inflate the tire/wheel combination to 40psi
Spray a solution of soapy water onto the wheel
Mark areas where bubbles appear with a tire crayon
If leaks in the wheel are found follow the maintenance procedure above to reseal the wheel

The most common cause for leaking modular wheels is; the tire changing person has stuck their tire spoon into the silicone seal and damaged it during a tire mount."