Clearance height for a 6" lift

[TXSUT]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by PhilD:
The angle of the road, bumps, etc, can also make a slight difference, so you should always add a couple of inches for margin.

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And don't forget incorrect clearance measurements, or like in my parking garage at work, failure to update the measurements after adding a new fire sprinkler system.