SPORTS PARTS INC 4428-S264697-18 Spi Suspension Spring Rear Left

( Brand: Sports Parts Inc ), ( Manufacturer Part Number: 4428-S264697-18 ), ( Part Type: Spring Suspension )

Review SPORTS PARTS INC Spi Suspension Spring Polaris Snowmobile Rear Left fits APOLLO 340 1979–1980

The **SPI (Sports Performance International) Suspension Spring (Part #4428-S264697-18)** is a precision-engineered, high-performance replacement spring designed specifically for the rear left suspension of the **1979 1980 Polaris Apollo 340**, a legendary off-road and trail-bike known for its rugged durability and adventurous spirit. Crafted from high-grade, heat-treated alloy steel, this spring is built to withstand the demands of aggressive riding, rough terrain, and repeated impacts without compromising on performance or longevity. Unlike standard OEM springs, which may soften or fatigue over time, the SPI spring features a **tuned rate and progressive action** to enhance ride comfort while maintaining optimal handling and traction. Its **customized coil design** ensures a smoother, more controlled suspension response, reducing bottoming out on rough trails and improving overall stability during sharp turns or sudden weight shifts. Whether tackling steep climbs, rocky descents, or fast-paced jumps, this spring delivers a **balanced blend of stiffness and flexibility**, allowing riders to push the limits of their Apollo 340 with confidence. The SPI spring is a direct-fit replacement, ensuring compatibility with the original suspension mounting points and linkages, and is backed by the brand s reputation for quality and reliability in the off-road and ATV performance industry. Ideal for riders seeking a noticeable upgrade in suspension performance, this spring is a must-have for those who demand both comfort and control on every adventure.

### **Pros and Cons of buying a Sports 4428-S264697-18 SPI Suspension Spring for a 1979-1980 Polaris Apollo 340 (Rear Left)**

1. **Improved Ride Comfort** The SPI (Spring Isolated Platform) suspension system is designed to reduce vibration and road shock, making the ride smoother compared to stock suspension. This can be particularly beneficial for off-road use where rough terrain is common.

2. **Enhanced Handling** The upgraded spring may provide better weight distribution and stability, leading to improved cornering and control, especially on uneven surfaces.

3. **Durability** SPI suspension components are often built to withstand higher stresses than stock parts, potentially extending the lifespan of your suspension system if properly maintained.

4. **Compatibility** This part is specifically designed for the 1979-1980 Polaris Apollo 340, ensuring a proper fit without modification. This reduces the risk of installation issues or premature wear due to incompatibility.

5. **Performance Benefits** Some riders report improved traction and reduced body roll, which can enhance overall performance in both on-road and off-road conditions.

6. **Resale Value** Upgrading to a reputable aftermarket suspension part like SPI may make your Apollo more appealing to collectors or enthusiasts, potentially increasing its resale value.

7. **Ease of Installation** Since it s a direct replacement, installation should be relatively straightforward for someone with basic mechanical skills, though professional help may be advisable for those unfamiliar with suspension work.

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1. **Cost** Aftermarket suspension springs are typically more expensive than OEM (Original Equipment Manufacturer) parts. Depending on availability, this spring could be a significant investment, especially if purchased from a specialty supplier.

2. **Potential for Overkill** If you primarily use your Apollo for light trail riding or casual off-roading, the performance gains from this spring may not justify the cost. Stock suspension may suffice for such applications.

3. **Maintenance Requirements** Upgraded suspension systems often require more frequent inspections for wear, lubrication, or adjustments. Neglecting maintenance could lead to premature failure or reduced performance.

4. **Weight Considerations** While SPI suspension is designed to be efficient, some aftermarket parts may add slight weight compared to stock components. This could marginally affect acceleration or fuel efficiency, though the impact is usually negligible.

5. **Availability and Lead Times** Specialty parts like this may not be readily available at local dealers. You might need to order online, which could result in longer wait times or shipping costs.

6. **Learning Curve** If you re not familiar with suspension tuning, installing or adjusting this spring might require research or professional guidance to ensure optimal performance.

7. **Risk of Mismatch** While the part is designed for your specific model, there s always a slight risk of compatibility issues if the suspension system has been previously modified or if other components (e.g., shocks, linkages) are worn or incompatible.

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The **Sports 4428-S264697-18 SPI suspension spring** is a high-quality upgrade for your 1979-1980 Polaris Apollo 340, offering noticeable improvements in ride comfort, handling, and durability. It is particularly worthwhile if you frequently ride on rough terrain, prioritize performance, or plan to keep the bike long-term. However, if your usage is minimal or you re on a tight budget, the stock suspension may be adequate.

For most serious riders who want to enhance their Apollo s performance and longevity, this upgrade is a **strong recommendation**. Just ensure you factor in the cost, maintenance needs, and potential lead times when making your decision.

**Buy the SPI suspension spring** if you value a smoother, more responsive ride and are willing to invest in a quality upgrade. Pair it with a professional installation or thorough inspection of your existing suspension to maximize benefits. If you re unsure, consult with a Polaris specialist or suspension expert to confirm compatibility and expected performance gains.

Details:

Parts without fitment are to be assumed universal and may require vehicle modification. This is helpful if you are buying multiple items. I need to exchange an item.: Brand: Sports Parts Inc, model Number: 4428-S264697-18.

SPI Suspension Spring for 1979 1980 Polaris Apollo 340 Snowmobile Rear Left: Application: Left. Compatibility: Years: Make: model: Application: Notes: 1979 - 1980 Polaris Gemini 250Rear Left, 1981 Polaris Gemini 244Rear 1980 Polaris Apollo 340Rear Left.

part #: 4428s26469718 price

• $21.09

specifications snowmobileshocksoi:

• for models: 340, Apollo
• for makes: Polaris
• for years: 1979-1980
• brand: Sports Parts Inc
• mpn: 4428-s264697-18
• part type: Spring Suspension

returns snowmobileshocksoi:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

payments snowmobileshocksoi:

• other
• wallet: Google-pay
• credit card: Diners-club

offer snowmobileshocksoi:

• options: Ship-to-home
• quantity: 9
• started: February 3, 2026
• availability: In Stock
• sold: 0

general snowmobileshocksoi:

• condition: New
• Parts Accessories > Snowmobile Parts > Shocks Suspension

seller snowmobileshocksoi:

• rating: 99.8%
• # reviews: 76757
• city: Indiana, US

shipping snowmobileshocksoi:

• cost: $0.00
• transit: 2-6 Days
• class: Standard
• type: Fixed
• service: Standard

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