This MFE 99 Explorer is a tube-type DOT-approved front tire with a load and speed rating of 51T.

The MEFO Explorer is the long distance professional dual-sport tire. Customers have reported to us that a set of Explorers can routinely take about 7,000-9,000 miles of use under the harsh adventure-touring conditions of Alaska. With secure, stable handling on dirt or wet pavement and high mileage performance, the Explorer has excellent all around versatility. Recommended for 50% street and 50% dirt riding. A great tire that will go anywhere and get you home again! DOT-approved.

Fits:
Honda CRF230F
Honda CRF230X
Honda CRF450X
Honda XR650R
Kawasaki KLX250S
Kawasaki KLX450R
Suzuki DR-Z400S
Yamaha WR250R
Yamaha WR450F

How to choose the right motorcycle tire for your riding style:

How to choose the right tire size for your motorcycle:

RI to South America on Mefo Explorer tires - A Twisted Throttle interview with MotoAdventureGal