The Pirelli MT 21 Rallycross rear tire is a dual-sport tire designed for riders who demand dependable off-road performance over extended distances. Its 120/90-17 size, 64R load and speed rating, and rear-wheel fitment make it a suitable replacement for compatible adventure, enduro, and dual-sport motorcycles. The tire is engineered primarily for off-road riding while maintaining on-road capability for connecting trails and paved routes.
Manufactured by Pirelli and supplied under vendor part number 3988400, the MT 21 Rallycross is recognized as a popular dual-sport choice in the United States. Its tread design supports traction across dirt, gravel, rocky paths, and other challenging off-road surfaces. With a 90% off-road and 10% on-road application, it is best suited for riders who prioritize trail performance while retaining limited street versatility.
Confirm motorcycle fitment, wheel position, load requirements, and manufacturer recommendations before installation. This Pirelli rear tire is intended for compatible motorcycles using a 17-inch rear wheel and the specified 120/90-17 sizing. Professional mounting and balancing are recommended for safe, reliable operation.
Features:
- Size: 120/90-17
- Model: MT 21 Rallycross
- Position: Rear
- Brand: Pirelli
- Manufacturer: Pirelli
- Vendor Part Number: 3988400
- Load and Speed Rating: 64R
- Application: Dual-sport tire with a 90% off-road and 10% on-road focus
- Performance: Designed for dependable off-road traction over long distances
- Fitment: Compatible with motorcycles specified for a 120/90-17 rear tire