Alpina STS2 & Forging Technology: Why Forged Wheel Rims are the Gold Standard

Whether on the racetrack with a supermoto, in tough off-road use with the KTM Super Adventure, or on long tours with the BMW R1300GS – the demands on modern spoked wheels are enormous.

With its patented STS2 system and consistent use of forging technology, Alpina has set a standard that goes far beyond traditional racing. In this article, we explain why forged wheel rims are the best choice for any motorcycle – from adventure bikes to street racers.

1. The Secret of Forging Technology: 14% More Load Capacity

A forged wheel rim differs fundamentally physically from a conventional rim. The extreme pressure during forging compacts and optimally aligns the structure of the aluminum (7075).

• The Advantage: An impressive increase of 14% in maximum load capacity compared to standard rims.
• Why This Is Important: Whether during hard landings off-road or fully loaded on the highway with a BMW R1300GS – the higher breaking strength provides the necessary safety reserves that are crucial in extreme situations.

2. No Weak Points Due to the Absence of Welds

Most standard rims are pressed (extruded) from a single strand, bent, and then welded.

• The Problem: Every weld is a physical weak point. The heat during welding makes the material more brittle and can lead to minimal imperfections.
• The Alpina Solution: Forged Alpina rims are manufactured without a weld seam. This guarantees 100% perfect concentricity and absolute material homogeneity. The result is extremely smooth running, which is particularly noticeable on adventure touring bikes at high speeds.

3. Superior Shock Absorption and Resilience

In tough use, deformations due to impacts (e.g., potholes or stones) pose the greatest risk. Forged rims have significantly higher resilience. This means they can absorb energy and are more likely to return to their original shape without permanent deformation. This makes them the ideal partner for demanding adventure tours and off-road trips.

4. STS2: Double Security Through Twin O-Ring Sealing

Forging technology allows Alpina to selectively reinforce the wall thickness in the rim bed area (center). This additional material thickness enables the use of the latest STS nipple generation:

• Double Sealing: Thanks to two sealing O-rings per nipple, the system is even more durable and less susceptible to pressure fluctuations.
• Maintenance-Free: As with all Alpina STS2 wheels, unreliable rim tapes or sealants are eliminated. The system remains mechanically sealed.

5. Noticeable Improvement in Riding Characteristics

No matter what bike you ride, the advantages of Alpina forged wheels are immediately noticeable:

• More Precise Handling: Less weight and perfect balance make changes of direction easier.
• Higher Riding Comfort: Perfect roundness eliminates vibrations.
• Maximum Stability: Targeted material reinforcement where the load is greatest.

Conclusion: An Upgrade for Every Terrain

The combination of forged rim rings and the STS2 tubeless system is, not without reason, the gold standard for models such as the KTM Super Adventure, BMW R1250/1300GS, or professional supermotos. It is the symbiosis of lightweight construction, extreme stability, and maintenance-free tubeless technology.

Discover the world of Alpina wheels at hartl-racing.de and configure the suitable wheel set for your bike.