| 仕様 |
Detail |
| タイヤサイズ |
120/90-18 |
| Construction Type |
Bias Ply (Diagonal) |
| Load Index / Speed Rating |
65S (290 kg / 180 km/h) |
| Ply Rating |
6PR (Standard) / 8PR (Reinforced Option) |
| Tread Depth |
8.5 mm (New) |
| Inflation Pressure (Max) |
290 kPa (42 PSI) |
| Overall Diameter |
Approx. 668 mm |
| Section Width |
Approx. 124 mm |
| Recommended Rim Width |
2.50 – 3.00 inches |
| Compound Type |
Silica-Infused High-Density Rubber |
FAQs: Troubleshooting and Maintenance for 120/90-18 Bias Tires
1. Why does my bias-ply tire wear faster in the center?
Center wear is typical for bias tires used primarily for highway cruising due to the crown shape. To mitigate this, ensure you maintain the manufacturer-recommended pressure (usually around 36-40 PSI for rear tires). Under-inflation exacerbates center wear significantly.
2. Can I mix a radial front tire with this bias-ply rear tire?
While technically possible on some motorcycles, it is generally not recommended. Mixing constructions can alter the handling geometry and stability of the motorcycle. For the 120/90-18 size, sticking to a bias-ply front (if applicable) or following the motorcycle manufacturer’s strict guidelines is safest.
3. What causes “cupping” or scalloped wear patterns on this tire size?
Cupping is often caused by mechanical issues rather than the tire itself. Check your motorcycle’s wheel balance, swingarm bushings, and shock absorbers. Worn suspension components cause the tire to bounce slightly, creating high and low spots on the tread.
4. How do I know if the tire is directional?
The 120/90-18 Motobike Más tire features a directional tread pattern designed for optimal water evacuation. Look for the rotation arrow on the sidewall; it must point in the direction of forward travel. Installing it backward will drastically reduce wet grip and increase noise.
5. Is this tire suitable for off-road use?
This bias-ply model is designed 90% for on-road and 10% for light gravel/dirt paths. It lacks the aggressive knobby spacing required for deep mud or sand. Using it for hardcore off-roading may damage the casing integrity.
6. My tire feels “squishy” in corners. Is this normal?
Bias-ply tires inherently have more sidewall flex than radials. However, if the squishiness feels excessive, check your load. If you are carrying a passenger and luggage, ensure you adjust the tire pressure according to the load chart to stiffen the sidewall response.
7. How long can I store these tires before they degrade?
With our anti-aging compound, the tires can be stored for up to 3 years without significant degradation, provided they are kept in a cool, dry, dark place away from ozone sources (like electric motors). Always check the DOT date code on the sidewall upon purchase.
8. What is the break-in period for this tire?
New tires have a release agent from the molding process that makes them slippery. You need approximately 100 km (60 miles) of moderate riding to scrub off this layer and allow the rubber to reach its optimal operating temperature and grip level.
9. Can I repair a puncture in this bias-ply tire?
Small punctures (less than 6mm) in the tread area can usually be repaired with a plug-patch combination. However, never repair a puncture in the sidewall of a bias-ply tire, as the structural integrity of the plies is compromised.
10. Why is the load index important for my cruiser?
Cruisers are heavy machines. The Load Index 65 indicates the tire can support 290 kg. Ignoring this rating and using a lower-rated tire can lead to catastrophic overheating and structural failure, especially during long-distance touring.
モトバイク・マスについて
Motobike Más focuses on delivering no-compromise touring tires at honest prices. By focusing on proven bias-ply construction and long-wearing compounds rather than marketing flash, they give riders a reliable option for the miles that matter most.
Every Motobike Más tire is manufactured in facilities that meet ISO 9001 quality management standards, with batch-level traceability from raw compound mixing through final vulcanization. Each tire is inspected for dimensional accuracy, balance, and visual defects before leaving the factory floor.
For the touring and cruising rider who values substance over branding, Motobike Más represents a straightforward proposition: a properly engineered bias tire that does its job, mile after mile.
✅
Quality Manufactured
ISO 9001-certified facilities with batch traceability and individual tire inspection.
💰
Fair Pricing
Touring-grade performance without the premium markup of legacy brand marketing.
🛠️
Rider-Focused Design
Built for real-world touring conditions — not racetrack marketing specs.
https://motobikemas.com/product/120-90-18-enduro-motorcycle-mousse-insert/
