There are various guidelines for how much tire clearance is necessary you dont want the tire to rub on anything as well as account for possible hazards. But move carefully here.
How To Add Tire Clearance To A Gm G Body Intermediate
How much clearance between tire and fender. I have 25 clearance between the inside wall of my tire and the fender. Some say they should have a reasonable amount of slack in them. A lift or leveling kit is one way to gain clearance. But its not the only way. If you decide to trim the inner fender lip to improve tire clearance it can be worth as much as 34 inch. It all depends on how much the suspension travels but i would say unloaded you would want at least an inch from the tops of the tires to the bottom of the fenders.
The question was is 12 enough room between the rear tires and the frame. And 325 clearance between the tread on my tires and the fender. For mountain biking youll want something larger. The last thing you want to have happen is pushing a car hard around a corner and have your fender lip slice a sidewall open on you. Modify the rear of the inner fender so theres enough tire clearance to run 2 to 3 inch taller tires without any clearance issue. With that in mind that 12 has become almost 0 clearance.
We prefer a far less expensive approach. From the joint below your fender clamp where the lower leg screws together on one it measured 2 and the other 134 from the joint to the bottom of your fender clamps. There are two schools of thought when mounting chains. How much clearance do i need between the fender and top of the tire fenders for 16 inch wheels on box trailer what size tires will fit with the 16 gauge steel single axle trailer fender f13x36 1r. With the body mounted most cars have inner fender panels hanging to the outside of the frame rails ane even below the frame rails. Keep in mind though that over time the springs will flatten out some as much as half an inch so keep that in mind years down the road.
Went out to the garage a bit ago and measured both my bikes. If you need to remove most of the lip area for clearance. I always like to have a good 38 to 12 inch clearance at a minimum. Never any issue with either bike between the tire and fender. Fender rolling for tire clearance a quick and dirty way to make more space for big tires. The bushings in your suspension allow for things to flex quite a bit during a hard corner.
On a road bike youll typically see recommendations for 3 5mm clearance in the front and rear. Our buddy blane came by the other day to grab some axles for a project.