Mounting Tire On

Before installing tube in tire, all dust and dirt, particularly hard particles which might chafe an inflated tube, must be removed. Wipe tube and inside of tire thoroughly with clean, dry cloth. If rim is dirty or rusty, clean with a stiff wire brush. Be sure to examine a used tire carefully for fabric injuries that may damage tube.

Before mounting tire, see that rubber rim strip is in place in rim-well, and that rim strip valve hole registers with valve hole in rim.

WARNING — Use correct inner tube for tire size. See "Tire Data" Section 1.

1. Insert tube in tire (placing valve at tire balance mark). Swab thoroughly all around base of tube, between the tube and side walls of tire with a heavy suds solution of tire mounting compound and water. Bead seat of tire should not be coated. Inflate tube just enough to round it out. With wheel lying flat, place tire on rim and align valve with hole in rim. Mount tire so that arrow on sidewall points in direction of wheel rotation. If applicable, balance mark on tire side-wall should be at valve stem.

2. Push bottom bead into rim well near valve and hold in well while forcing remaining portion of bead over rim flange with a tire tool.

3. Spread tire and insert valve through hole in rim.

4. Force upper bead over rim flange and into well at point opposite valve. Stand or kneel on this side of tire to hole it in well and pry remaining portion of tire over rim flange. While forcing bead over rim flange, keep as much bead as possible in rim well. Be careful not to damage beads or pinch tube. Inflate tire to recommended pressure and check valve for leak. See tire inflation pressures in "Tire Data," Section 1 A.

5. After inflating to recommended pressure, completely deflate to smooth out any wrinkles in tube and allow tube to find its place, free from strain or stress. Again inflate to recommended pressure and check valve for leak.


1. Check runout by turning wheel on axle, measuring amount of sideways displacement from a fixed point near the tire (see Figure 2-26).

2. Tire tread runout should be no more than 3/64 in. If tire tread runout is more than 3/64 in., remove tire from rim and check rim bead side runout to see if rim is at fault (see "Truing Wheel").

3. If rim side runout is less than 1/32", tire is at fault and should be replaced. If rim side runout is more than 1/32", correct by tightening selected spoke nipples as outlined previously, reinstall old tire and recheck tire tread lateral runout.

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