What effects does updating the front tire from 100/90-18 to 110/80-18 have?

Changing the tire size from 100/90-18 to 110/80-18 can impact the handling and performance:

Tire Width (100 mm to 110 mm)

• Increased Stability: A wider tire (110 mm) provides a larger contact patch with the road, enhancing stability, especially during cornering and at high speeds.
• Improved Traction: The larger surface area can improve traction, which is beneficial in both dry and wet conditions.
• Steering Effort: The increased width may make the steering slightly heavier, requiring more effort to turn the handlebars.

*Aspect Ratio (90% to 80%)*

• Lower Profile: The 80% aspect ratio means the sidewall height is lower than that of the original tire. This can lead to quicker steering response, as the tire has less flex.
• Ride Comfort: A lower profile tire can result in a firmer ride, as less cushioning is provided by the tire's sidewall.

Handling Characteristics

• Cornering: A wider and lower-profile tire might make the bike feel more planted in corners, offering better grip and stability.
• Turn-In: The turn-in might be sharper with the lower profile tire, allowing for more precise and responsive handling.
• Ride Height: The overall diameter change (if significant) can alter the ride height slightly, impacting the bike’s geometry and possibly its center of gravity.

Speedometer and Odometer Accuracy

• Calibration: The change in tire size may affect the accuracy of the speedometer and odometer. These instruments could read incorrectly if the new tire has a different overall diameter.

Clearance and Fitment

• Compatibility: Ensure the wider tire fits within the swingarm and doesn’t interfere with the fender or other components. Adequate clearance is essential to avoid rubbing or other issues.

Load and Pressure Adjustments

• Tire Pressure: The new tire may require different pressure settings for optimal performance. Always follow the tire manufacturer’s recommendations.
• Load Rating: Ensure that the new tire maintains or exceeds the load rating of the original tire to support the bike and rider safely.

Summary
Switching from a 100/90-18 tire to a 110/80-18 tire can enhance stability, traction, and handling precision while making the ride firmer and steering heavier. Verifying fitment and making necessary adjustments to maintain the bike's performance and safety is crucial.