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Hummer Knowledge Base

The Hummer Knowledge Base

Cross-Country Tire Pressures:

Extract from US Army Tech Bulletin on recommended cross-country tyre pressures:

M998, M998A1, and M998A2 Series HMMWV

Cross-Country Tire Pressures

The vehicle operator´s manual does not include cross-country tire pressures.

The recommended cross-country tire pressures with the vehicle at Gross Vehicle Weight (GVW) are listed in the following chart:

M998 and M998A1 series(except M1097 and M1097A1)
Bias and Radial:
Front Tire 15 psi (103 kPa)
Rear Tire 20 psi (138 kPa)

M998A2 series (and M1097 and M1097A1)
Front Tire 20 psi (138 kPa)
Rear Tire 30 psi (207 kPa)


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