Dunlop MX Tires

7/29/2019 Dunlop MX Tires

1/8

Dunlop MX TiresHard Terrain

SIZE LOAD/SPEEDINDEX

SIDEWALL PART # APPLICABLERIMS

RECOMMENDEDRIM

OVERALLDIAMETER

OVERALLWIDTH

FULLTREADDEPTH

MAXIMUMLOAD @PSI

GEOMAX MX71 Front

70/100-17 40M 32HP18 1.40 22.83 3.31 12/32

70/100-19 42M 32HP20 1.40 24.84 3.27 12/32

80/100-21 51M 32HP26 1.60 27.72 3.66 14/32

90/100-21 57M 32HP10 1.60 27.99 3.82 14/32

GEOMAX MX71 Rear

90/100-14 49M 32HP27 1.60 21.38 4.13 16/32

90/100-16 52M 32HP28 1.85 23.46 4.21 16/32

110/90-18 61M 32HP30 1.85 26.10 4.88 20/32

120/90-18 65M 32HP06 2.15 26.81 5.20 20/32

100/90-19 57M 32HP32 1.85 26.89 4.69 20/32

110/80-19 59M 32HP55 2.15 27.44 5.08 20/32

100/90-19 62M 32HP36 2.15 27.44 5.08 20/32

120/80-19 63M 32HP77 2.15 27.13 5.31 20/32

Intermediate Terrain



RECOMMENDEDRIM

OVERALLDIAMETER

OVERALLWIDTH

FULLTREADDEPTH

MAXIMUMLOAD @PSI

GEOMAX MX51 FRONT

2.50-10 33J 32CS17 1.50 15.08 2.76 10/32

2.50-12 39J 32CS18 1.50 17.17 2.80 10/32

60/100-14 30M 32CS15 1.40 18.94 2.80 12/32

70/100-17 40M 32CS11 1.40 22.87 3.27 13/32

70/100-19 42M 32CS13 1.40 24.88 3.23 13/32

80/100-21 51M 32CS01 1.60 27.87 3.66 15/32

90/100-21 57M 32CS02 1.60 28.03 3.86 15/32

GEOMAX MX51 REAR

2.75-10 38J 32CS19 1.50 15.39 2.99 11/32

80/100-12 41M 32CS16 1.60 18.39 3.66 15/32

90/100-14 49M 32CS12 1.60 21.42 4.13 16/32

90/100-16 52M 32CS14 1.85 23.50 4.21 17/32

110/90-18 61M 32CS05 1.85 26.14 4.80 20/32

120/90-18 65M 32CS06 2.15 26.85 5.20 20/32

100/100-18 59M 32CS09 1.85 26.30 4.61 20/32

110/100-18 64M 32CS10 2.15 27.09 5.00 21/32

100/90-19 57M 32CS07 1.85 26.46 4.65 20/32

110/80-19 59M 32CS03 1.85 26.73 4.96 20/32

110/90-19 62M 32CS08 2.15 27.13 5.04 20/32

120/80-19 63M 32CS04 2.15 27.13 5.12 20/32


2/8

Soft/Mud Terrain



RECOMMENDEDRIM

OVERALLDIAMETER

OVERALLWIDTH

FULLTREADDEPTH

MAXIMUMLOAD @PSI

GEOMAX MX31 FRONT

2.50-10 33J 32SE66 1.50 15.35 2.80 10/32

2.50-12 39J 32SE67 1.50 17.20 2.83 10/32

60/100-14 30M 32SE64 1.40 19.06 2.80 12/32

70/100-17 40M 32SE60 1.40 22.91 3.27 14/32

70/100-19 42M 32SE62 1.40 24.88 3.27 14/32

80/100-21 51M 32SE55 1.60 27.91 3.70 15/32

GEOMAX MX31 REAR

2.75-10 38J 32SE68 1.50 15.39 2.95 12/32

80/100-12 41M 32SE65 1.60 18.46 3.66 16/32

90/100-14 49M 32SE61 1.60 21.61 4.09 17/32

90/100-16 52M 32SE63 1.85 23.46 4.13 17/32

110/90-18 61M 32SE58 1.85 26.14 4.84 21/32

120/90-18 65M 32SE59 2.15 26.77 5.24 21/32

110/80-19 59M 32SE56 1.85 26.77 5.00 21/32

120/80-19 63M 32SE57 2.15 27.36 5.31 21/32


3/8

Hard-to-Intermediate Terrain



RECOMMENDEDRIM

OVERALLDIAMETER

OVERALLWIDTH

FULLTREADDEPTH

MAXIMUMLOAD @PSI

D739 Front

70/100-17 40M BW 32SB-18 1.40 23.00 3.27 12/32

70/100-19 42M BW 32SB-20 1.40 25.10 3.31 12/32

D739 Rear

90/100-14 49M BW 32SB-27 1.60 21.20 4.13 16/32

90/100-16 52M BW 32SB-28 1.60 23.50 4.33 16/32

D739 A/T Rear

110/100-18 64M BW 32TM-38 2.15 27.00 5.00 21/32

120/90-19 66M BW 32TM-33 2.50 27.50 5.39 21/32

120/100-18 68M BW 32TM-42 2.50 27.40 5.19 21/32

D739FA-J Front (four stroke)

80/100-21 51M BW 32TP-26 1.60 27.80 3.60 14/32

Hard-to-Intermediate Terrain



RECOMMENDEDRIM

OVERALLDIAMETER

OVERALLWIDTH

FULLTREADDEPTH

MAXIMUMLOAD @PSI

D745F Front

80/100-21 51M BW 32RB-26 1.60 27.90 3.58 14/32

90/100-21 57M BW 32RB-10 1.60 28.00 3.70 14/32

D745 Rear

110/80-19 59M BW 32RB-55 1.85 26.70 4.84 20/32

120/80-19 63M BW 32RB-77 2.15 27.10 5.24 20/32

110/80-19 59M BW 32RB-55 1.85 26.70 4.84 20/32

120/80-19 63M BW 32RB-77 2.15 27.10 5.24 20/32

Intermediate-to-Soft Terrain



RECOMMENDEDRIM

OVERALLDIAMETER

OVERALLWIDTH

FULLTREADDEPTH

MAXIMUMLOAD @PSI

D756 Front

80/100-21 51M BW 32SC-26 1.60 27.80 3.60 15/32

D756 Rear

100/100-18 59M BW 32SC-34 1.85 26.60 4.90 20/32

110/100-18 64M BW 32SC-38 2.15 27.10 5.20 21/32

100/90-19 57M BW 32SC-32 1.85 26.90 4.80 20/32

110/90-19 62M BW 32SC-36 2.15 27.10 5.10 20/32


4/8

Changing Your TiresTire Removal:

1. Lay the rear wheel sprocket side down and the front wheel brake side up.2. Remove the valve core and loosen the rim locks.3. Stand the wheel up and use the flat side of a tire iron to push the rim locks down,

breaking them loose from the tire bead.

4. Lay the wheel down again and stand on the tire sidewalls with your feet pushing tobreak the beads loose from the rim. Sometimes a little soapy water at the tire/rimjunction helps loosen the beads.

5. With the brake side of the wheel up, use the spooned end of your tire irons and insertthem between the bead and rim. I suggest inserting them on one side of the valvestem or the other. Lever one at a time, working your way around the tire in smallincrements.

6. After the first side is removed, push the valve stem into the rim and pull the tube allthe way out.

7. If your wheel has rim locks, remove them before beginning removal of the secondbead.

8. Remove the second bead by inserting a tire iron under the bead of the brake side ofthe wheel, then lever the tire bead over the rim and push it off.

9. Clean the bead area of the rim. Check the rim locks, rubber rim strip or tape covering

the spoke nipples for damage.

Tire refitting:

1. Install one rim lock, lube one bead of the tire. Push down on the top of the tire andinsert one side of the wheel and the rim lock into the bottom part of the tire. Beginlevering the first bead on.

2. Insert the second rim lock if your wheel uses two. Before installing the tube, inflate itto make sure there was no damage done during removal. Check the nut at stem areafor tightness and look for cracks in the stem. Leave just enough air in the tube forinstalling so the tube holds its shape.

3. Apply baby powder to the outside of the tube and inside the tire. This prevents thetube from chafing while in use.

4. Install the tube in the tire carefully. Starting at the valve stem holes, evenly place the

tube inside. Be sure the tube is not bunched up in any area or caught under the rimlocks.

5. Lube the bead with a mild soap and water solution and push a small section of itunder the rim near the stem area. Insert one tire iron and start levering the tire beadon, taking very small bites with each iron. Stick the iron in just far enough past the rimedge being careful not to catch the tube.

6. With each bite, check that the bead of both sides of the tire is as far down in the wellof the rim as possible.

7. After the final bead area is installed, be sure the rim locks and valve stem movefreely.

8. Inflate the tire and seat both beads. Should the beads not seat properly, do not over-inflate. Relube the bead areas with soapy solution and reinflate until seated properly.

9. After the tire is fully inflated, let the air out again then reinflate. This allows the tube tosettle inside the tire.

10. Tighten the rim locks and adjust the tire pressure.


5/8

Choosing the Best Tires for BeginnersFor the beginning motocross rider, there are many difficult choices to make: from the bestcarburetion and suspension settings, what tire to use, etc. In this column, we'd like to helpmake your first tire choice the right one.

Where you ride is important. Before you select a tire, go look at a few large riding areas orracetracks in your district. The ground conditions where you practice may be completely

different from those in an area where many people ride or race. Pay close attention to theconditions in all parts of the track, especially the start line.

If the ground is very dryhard to the point where it doesn't break up when you kick ityoushould consider a rear tire with a hard track tread pattern like Dunlop's D739 or D903 pairedwith Dunlop's D739 or D606 front. These tires put more rubber on the ground for maximumgrip.

If the ground has a cushion on it and is rutted with deep berms, you probably need a softtrack tire that will dig in on loose soil. Dunlop's D756 front and rear tire make an excellentchoice.

Finally, if you live in an area where ground conditions vary from hard-packed to loose loam orsand, you'll want an intermediate terrain tire, like Dunlop's D739 paired with Dunlop's D756

front.

Remember to always maintain proper inflation pressure if you want the most from your tires.For hard conditions, 12-14 psi front and rear. For loose dirt with some hard areas, 12-14 psifront and rear. And for sand and mud, 14-18 psi front and rear.

Tires for Desert, Enduro and Hare Scrambles

Tires for use in desert, enduro and hare scrambles have three things in common: sizeapplication, a tread pattern that performs over a wide range of terrains, and a durable treadcompound that will stand up to severe punishment and distance.

Most desert events in the U.S. and Mexico are run under dry conditions. The courses containrock (large and small) with some tight, twisty trails, but most are hard-to-sandy open trails and

roads, and evenly paved section that can be taken at high speeds.

Desert events require a special type of tire:

The tread compound must resist knob tearing from rocks and provide minimal wearover long periods of time. And, since desert speeds are far greater than those inmotocross or enduro events, they must also be able to resist heat buildup.

The casing construction must resist punctures and optimize stability over a range ofspeeds.

The tread pattern must resist wear, provide maximum grip, and clean well under awide variety of conditions.


6/8

Desert inflation pressures vary, but generally 14 psi is the minimum and 18 psi is themaximum.

Dunlop offers two excellent desert tires: the D739 Desert A/T rear and the D606 front. Tiresfor enduro and hare scrambles are similar since both are primarily run in softer, wetter,muddier terrain with slippery rocks and areas with exposed tree roots. Since some areas ofthese courses can be hard and slippery, the tires must account for this as well.

The tread compound used in these tires must provide an optimum balance betweenwet and muddy terrain traction and long-wearing durability.

Casing constructions must flex readily for riding over slippery rocks and tree roots, yetprovide ample resistance to punctures.

The tread pattern should clean well, even under the worst conditions, yet offerpredictable handling in dry terrain.

Inflation pressures for enduro/hare scrambles vary, but generally 14 psi is a minimum and 18psi is a maximum.

Dunlop's D739 (Hard to Intermediate) will be a great choice for the courses that are a littlemore hard packed while the D756 (Soft to Intermediate) is an excellent choice for the muddiercourses.

How Are New Motocross Tires Developed?Developing a successful motocross tire requires a continuous schedule of race tire testingand development. Dunlop has race service teams on hand each week at motocross andsupercross events across the country.

In return, these pro riders provide continuous feedback on tire performance to our engineers.Their feedback helps Dunlop perfect new tire technology before it becomes available tocustomers.

Dunlop's D755 front is the perfect example. In early 1993, Dunlop set out to develop theultimate intermediate terrain front tire.

Hand-cut D755 prototypes were developed and privately tested for the next four months.

During this time, the tread pattern and dimensions were revised several times.

By January 1994, D755s were supplied to Dunlop riders for the AMA Supercross Series.During the series, many tests were conducted to fine-tune the tire's tread radius, profile anddimensions for final production specifications.

Today, the D755 is available for anyone who wants the best in motocross performance. And,it's the perfect example of why tire manufacturers concentrate on racing developmentprograms. It's just one more way Dunlop assures our customers of exceptional performanceand quality.


7/8

Tread Rubber CompoundsIn the early days of knobby tire development, quite often the same tread pattern was used forall track conditions. The primary difference in the tires was their rubber compounds, whichwere specialized for hard terrain or soft terrain. Generally, hard terrain tires had soft rubbercompounds and soft terrain tires had very hard rubber compounds.

The speed and punishment a tire must now endure during a race or moto are far greater than

in the past. As a result, yesterday's soft rubber tread compounds generally would wear toorapidly for today's racers.

Current tread compound development, however, is much more sophisticated. Tread patternsand compounds can be computer optimized and matched for specific track conditions. Thisnew compounding technology allows high grip levels to be achieved without making the treadtoo soft for durability. By matching this compound with a hard terrain tread pattern, the bestoverall performance can be achieved. Dunlop's D903 is an excellent example.

Even soft terrain tires can benefit from the use of similar hard terrain compoundingtechnology. The reason for this is that most soft tracks in the U.S. have a card base orcement start pad. Offering a tread pattern that cleans well on soft surfaces along with a highgrip compound gives the tire a much wider range of use. Dunlop's D756 is an example of thistype of tire.

Dunlop's intermediate tires use compound technology similar to that of our hard terrain tires.Because these tires are primarily used on dry surfaces, the emphasis is on high grip levels toachieve the best performance. Dunlop's D739 is a good example of this combination.

Whether it's for soft terrain, hard terrain or intermediate terrain, Dunlop offers the idealcombinations of performance characteristics for your requirements. Ask your Dunlop dealerwhat tire is best for you.


8/8

How To Install Dunlop's Crescent MousseBuy a Dunlop Crescent Mousse and you get:

1 mousse

1 innertube

1 tire tool

1 tube of lubricant

Installation Instructions:

1. Apply about 3/4 of the supplied tube of lubricant sparingly to the outside of themousse for a uniform, thin coating.

2. Insert lubed mousse into tire casing.3. Apply the remainder of the lubricant to the part of the innertube that contacts the

mousse.4. Insert the innertube into the mousse.5. Inflate the innertube slightly to help hold it in place.6. When orienting tire/mousse assembly on the rim, position the rim lock cutout area on

the mousse so that it lines up with the rim lock.7. Line up innertube value stem with valve stem hole in rim while holding mousse so

that rim lock cutout remains in place.8. Lubricate both sides of the tire bead with a soap/water solution.9. Pull innertube out slightly so that the valve stem can be positioned in the hole on the

rim and secure stem loosely with nut.10. Using tire iron, slip the first side of the tire over the rim.11. Once one side is in all the way on the rim, pull that same tire bead over the second

side of the rim only at rim lock area.12. Push rim lock up and release tire lever to allow bead to slip back over rim and under

the rim lock.13. Make sure to push edge of mousse down inside rim to protect it from the tire irons

when positioning remainder of bead.14. Starting between the valve stem and the rim lock, begin levering the second bead

over the rim working toward the rim lock.15. Position the supplied Dunlop tire hold tool between tire and rim and push down over

spoke and slide to hold in place.16. Push the rim lock up and the lever bead over the rim.17. Begin levering the bead on the rim continuing back toward the valve stem.18. Place a tire lever between rim and tire and push down. This will keep tire in rim

center.19. Slowly continue to lever the tire onto the rim in small increments.20. For ease of mounting, push as much of the bead down to the center of the rim as

possible.21. Once both beads are on, remove the tire tool and levers and inflate tire until beads

are seated fully (up to maximum 40 psi).22. Release air to allow the innertube to relax and center itself.23. Inflate to 16 psi operating pressure.

NOTE: If tire beads do not seat properly, release air, relubricate beads and reinflate. Never

exceed a pressure of 40 psi to seat tire beads. Before using, be sure to reduce pressure to 16psi operating pressure.

Dunlop MX Tires

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