If they are the same as here in wa...
In wa you need to have mudflaps that go to the center point of your tire (your axle), and i beleive that you are not supposed to have any tire thread that is not covered by the fender.

I have not been bugged about either though. My tires stick out about an inch and a half, and 3 quaters of the height of my tires are exposed.

 

(7) Fenders: All wheels of a motor vehicle must be equipped with fenders designed to cover the entire tire tread width that comes in contact with the road surface. Coverage of the tire tread circumference must be from at least fifteen degrees in front and to at least seventy-five degrees to the rear of the vertical centerline at each wheel measured from the center of the wheel rotation. At no time can the tire come in contact with the body, fender, chassis, or suspension of the vehicle.

 

my only experience was finding the rust after they had been on there for a few years...than fixing the rust when I repainted the truck

similar to washington it sounds like:
from the ODOT website: http://www.oregon.gov/ODOT/TS/Veh_Equipment.shtml

FENDERS

5) Does my vehicle need mud flaps/mud guards?

Answer: Non commercial vehicles (under 8,000 lbs.) need fenders or mud guards (mud flaps) within 27 inches of the pavement behind all wheels. Commercial vehicles need fenders or mudguards (mud flaps) within 10 inches behind all wheels. (ORS 815.180)
Fenders and mud guards (mud flaps) must cover the entire tread width of the tire(s). (ORS 815.180)

6) How far can a vehicle sit off the ground before mud flaps are required?

Answer: For a vehicle that is less than 8,000 lbs the law states: "...fenders or mudguards must extend in full width from a point on the wheels that is above and forward of the center of the tire over a point at the rear of the wheel that is not more than 27 inches above the surface of the highway." ORS 815-180 (2) (c) The issue is not how far the truck can sit off the ground so much as making sure that fenders or mud flaps are in place not more than 27 inches from the surface of the highway.

7) Where do you measure that height from, lowest point of back bumper?

Answer: As stated above, you would measure the height from the ground and make sure it is not more than 27 inches.

8) How far are tires allowed to stick out from the side of a vehicle before you must get fender flares?

Answer: A fender or mudguard must cover the complete width of the tires tread. This is in ORS 815.180 (1) (a). The fender or mudguard must also be of sufficient size and constructed so that it is capable of deflecting or arresting any dirt, mud, water or other substance that may be picked up and carried on the wheels.

 

Where's the brief.

 

i got a way with just really big mud guards for the longest time on my first truck with 3" body,
6" suspension, and 35's......

4Crawler I beleive has a removeable mudflap cheap fix thread on his website......

 

...I do like'm...Very Nice Truck...
- Don't you also need these?

 

I like em, especially for the price. I just can't see paying the money for Bushwackers when they break so easily, a guy in the club broke 2 a few weeks ago. For a trail truck I'd go this route and think I will, mall crawler...Bushwacker!

 

Yep! Those are next on the list...

 

Bigbluepile has a write up on removable mudflaps as well.