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Get absolute urban agility, confident wet-weather performance, and balanced daily mileage with the high-performance Dunlop Sportmax GPR-300 Rear Motorcycle Tire [MPN: 45067903]. Engineered as the definitive choice for entry-to-mid level sportbikes, lightweight naked commuters, and small-displacement trainers, this premium radial tire bridges the gap between affordable economy and aggressive sport handling. Featuring an advanced, computer-optimized tread matrix, it ensures exceptional tracking stability, responsive turn-in capabilities, and long, uniform wear characteristics throughout the lifespan of the casing.
Part number 45067903 is manufactured in the highly popular lightweight metric sport rear configuration. Meticulously cross-referenced against factory powersports vehicle blueprints, this 140/70R17 rear tire is a verified direct replacement fit for a wide variety of small-to-mid displacement sport and naked machines, including:
CRITICAL TUBELESS MAG ASSEMBLY, RADIAL GEOMETRY, AND BREAK-IN WARNINGS:
**Strict Radial Casing Framework Warning:** The Sportmax GPR-300 is a dedicated high-performance **Radial (R)** construction tire. It should **never** be mixed on a motorcycle with a front bias-ply tire, and it cannot be used on legacy sub-compact cruisers designed strictly for flat bias-ply footprint mechanics. Mixing casing technologies will induce severe geometric misalignment and trigger dangerous high-speed chassis weave.
**Tubeless Alloy Rim Assembly Logic:** This tire features a standard Tubeless (TL) radial bead design construction. **It is engineered to be safely run completely tubeless on factory aluminum alloy or mag wheels** standard on modern entry-sport motorcycles. Always ensure a fresh rubber or metal valve stem is installed along with clean bead seats to guarantee a secure pneumatic lock.
**Critical 100-Mile Tire Break-In Protocol:** Brand new street tires feature a slick mold-release sheen on the outer tread surface straight from the manufacturing assembly plant. **Riders must exercise extreme caution during the first 100 miles of operation**. Avoid sudden heavy acceleration, hard braking, or aggressive lean angles until the tread compound has been scuffed cleanly against raw pavement to establish full friction traits.
| Attribute | Specification |
|---|---|
| Tire Size Metric Designation | 140/70R17 (Width: 140mm / Aspect Ratio: 70% / 17" Radial) |
| Wheel Rim Diameter Suitability | 17 Inch Rear Rim Fitting |
| Load Index Rating | 66 Index (Supports up to 661 lbs / 300 kg Maximum Weight) |
| Speed Symbol Rating | H Rating (Safety-Certified up to 130 MPH / 210 km/h) |
| Carcass Structural Engineering | Radial Ply Frame with Jointless Belt (JLB) Rear Reinforcement Matrix |
| Tire Application Class | Tubeless (TL) - Specialized for lightweight factory alloy/mag rims |
| Sidewall Styling Configuration | Blackwall (BW) with Sportmax GPR-300 Layout Stamp |
| Primary Application Position | Rear Wheel Only |
| Manufacturer Part Number | 45067903 |
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