CST CM-A4II Motorcycle Tyre - 90/90-21
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Product Information
Full details
The CST CM-A4II 90/90-21 motorcycle tyre is engineered for dual-sport riders who navigate both paved roads and unpaved trails. Its primary strength lies in its hybrid tread design, providing a stable contact patch for commuting while maintaining aggressive biting edges for off-road versatility; however, riders primarily focused on extreme mud or high-performance track racing may find its middle-ground design less specialized than dedicated competition tyres.
All features
| Model Part Number | TM00555400 |
|---|---|
| Brand | CST |
Extended Product Information
FAQs
Is this a tubeless or tube-type tyre?
The CST CM-A4II is generally designed for standard applications; however, always verify the specific rim requirements of your motorcycle, as it may require a tube depending on your wheel type.
Can I use this for track days?
This is a dual-sport tyre designed for street and light trail use. It is not intended for high-speed sportbike track performance.
How long will the tread last?
Tread life varies significantly based on riding style, road surface, and maintenance, but the nano-silica compound is specifically formulated for improved longevity.
Does this tyre work well in sand?
It provides moderate performance on packed dirt and gravel, but for deep sand, a more specialized, aggressive knobby tyre is recommended.
Should I adjust pressure for off-road use?
Some riders prefer slightly lower pressures on dirt for more compliance, but you must stay within the manufacturer's safe operating limits for the tyre and rim.
Troubleshooting
Excessive vibration at highway speeds
Ensure the tyre is correctly balanced. Check for uneven wear patterns or improper tyre pressure.
Reduced traction in wet conditions
Check tread depth. If the wear indicators are flush with the tread, the tyre has reached its service life and should be replaced.
Pros and Cons
Pros
- Excellent versatility for mixed terrain riding
- Enhanced grip in wet conditions due to nano-silica compound
- Stable and predictable handling at higher highway speeds
- Durable construction for long-distance mileage
Cons
- Not a dedicated tyre for heavy mud or deep sand
- Road noise may be slightly higher than pure street tyres
- Requires professional mounting for balancing
Setup, Compatibility & Care
Ensure your motorcycle wheel is compatible with the 90/90-21 size specification before installation. It is highly recommended to have this tyre mounted by a professional using a dedicated tyre changing machine to prevent damage to the bead.
Maintenance Tips:
- Check Pressure Regularly: Always maintain the manufacturer's recommended tyre pressure for the specific bike model to ensure optimal contact patch performance.
- Run-in Period: Treat new tyres with caution for the first 50-100 miles, as the surface may be slippery until the mold-release agents are worn off.
- Visual Inspection: Regularly inspect the grooves for embedded rocks or debris that could lead to premature wear or punctures.