Motorcycle Tire Size Chart
Last updated on February 26th, 2026
Choosing the right tire starts with understanding the numbers on the sidewall. A motorcycle tire size chart is a simple reference table that helps you match those numbers to the correct wheel size and recommended fit. Instead of guessing what fits your bike, the chart gives you a clear starting point.
Knowing your tire size matters more than most riders think. The wrong size can affect handling, braking, and overall safety. Even a small change in width or profile can alter how your bike feels in corners or at higher speeds. Getting the size right protects both your performance and your peace of mind.
In this chart-focused guide, you’ll find easy-to-read front and rear tire size tables, clear explanations of what the numbers mean, and practical tips to help you confirm compatibility. Everything is laid out so you can quickly check your size and move forward with confidence.
If you’re here to get the exact size you need — no guesswork — you’re in the right place.
How to Read the Tire Size Numbers
The numbers on a motorcycle tire can look confusing at first. I remember staring at mine the first time and wondering what all of it meant. Once you break it down, though, it’s actually simple.
Let’s use this example: 180/55ZR17
Each part tells you something specific about the tire.
- 180 – This is the tire’s width, measured in millimeters. It tells you how wide the tire is from one side to the other.
- 55 – This is the aspect ratio. It shows how tall the side of the tire is compared to its width. In this case, the side height is 55% of 180 mm. Lower numbers usually mean a shorter, sportier tire.
- Z – This relates to the speed rating. It tells you the maximum speed the tire is designed to handle safely. You don’t need to memorize the letters — just make sure it matches or exceeds what your bike requires.
- R – This means the tire is radial construction. Most modern street bikes use radial tires.
- 17 – This is the rim diameter in inches. It tells you the wheel size the tire fits. This number must match your wheel exactly.
Motorcycle Tire Size Chart
Motorcycle Front Tire Size Chart
Below is a clean, chart-focused reference of common front motorcycle tire sizes, their rim diameters, approximate recommended rim width ranges, and typical bike types where you’ll see them. Use this as a quick lookup — always verify with your bike’s owner manual, the tire sidewall, and the tire manufacturer’s fitment chart before buying or fitting a different size.
⚠️ Note: the rim diameter is part of the tire size (e.g., 120/70-17 → 17″ rim). Rim width ranges shown are typical approximate ranges; check ETRTO/manufacturer specs for exact compatibility.
Front Tire Size Chart (Common Sizes)
| Tire Size | Rim Diameter | Typical Rim Width (in) | Typical Bike Type / Notes |
| 80/90-21 | 21″ | 1.85 – 2.50 | Off-road / adventure (large front wheel for handling) |
| 90/90-21 | 21″ | 1.85 – 2.50 | Off-road / adventure / dirt |
| 100/90-19 | 19″ | 1.85 – 2.50 | Dual sport / adventure / some cruisers |
| 110/80-19 | 19″ | 2.15 – 3.00 | Adventure / some touring models |
| 100/90-18 | 18″ | 1.85 – 2.50 | Sport touring / standard / small cruisers |
| 110/80-18 | 18″ | 2.15 – 3.00 | Sport touring / adventure |
| 120/70-17 | 17″ | 2.50 – 3.50 | Sportbikes / supersport — very common OEM front size |
| 110/70-17 | 17″ | 2.15 – 3.00 | Sport / naked / entry sportbikes |
| 100/70-17 | 17″ | 2.15 – 2.75 | Small sport / commuter bikes |
| 90/90-17 | 17″ | 1.85 – 2.50 | Commuters / small-displacement bikes |
| 80/90-17 | 17″ | 1.85 – 2.25 | Small commuters / scooters (larger rim) |
| 120/80-16 | 16″ | 2.50 – 3.50 | Some cruisers / older sportbikes |
| 100/90-16 | 16″ | 1.85 – 2.50 | Classic cruisers / scooters |
| 110/70-16 | 16″ | 2.15 – 3.00 | Scooters / small sport scooters |
| 130/70-15 | 15″ | 3.00 – 4.00 | Some sport scooters / maxi scooters |
| 120/70-15 | 15″ | 3.00 – 3.50 | Maxi scooters / select sport scooters |
Motorcycle Rear Tire Size Chart
Below is a chart-focused reference of common rear motorcycle tire sizes, including rim diameter, typical rim width ranges, and common applications. This is designed as a quick lookup tool — always confirm with your owner’s manual and the tire manufacturer’s fitment chart before installing a different size.
⚠️ Note: Rim width ranges below are general industry ranges. Always verify exact compatibility using the specific tire manufacturer’s technical specifications.
Rear Tire Size Chart (Common Sizes)
| Tire Size | Rim Diameter | Typical Rim Width (in) | Common Bike Type / Notes |
| 110/90-18 | 18″ | 2.15 – 3.00 | Small standards / vintage bikes |
| 120/90-18 | 18″ | 2.50 – 3.50 | Classic / dual sport |
| 130/80-17 | 17″ | 2.75 – 3.50 | Small sport / commuter |
| 130/70-17 | 17″ | 3.00 – 4.00 | Entry-level sport / naked bikes |
| 140/70-17 | 17″ | 3.50 – 4.50 | Common mid-size sport / naked |
| 150/60-17 | 17″ | 4.00 – 4.50 | Sport bikes |
| 150/70-17 | 17″ | 4.00 – 4.50 | Adventure / sport touring |
| 160/60-17 | 17″ | 4.50 – 5.00 | Sport / naked bikes |
| 170/60-17 | 17″ | 4.50 – 5.50 | Adventure / sport touring |
| 180/55-17 | 17″ | 5.00 – 6.00 | Very common sportbike OEM rear |
| 190/50-17 | 17″ | 5.50 – 6.00 | Supersport / liter bikes |
| 190/55-17 | 17″ | 5.50 – 6.00 | Modern sport / track setups |
| 200/55-17 | 17″ | 6.00 – 6.25 | High-performance sport / superbike |
| 150/80-16 | 16″ | 3.50 – 4.25 | Cruiser / touring |
| 160/80-16 | 16″ | 3.50 – 4.50 | Cruiser |
| 170/80-15 | 15″ | 4.00 – 5.00 | Cruiser / V-twin |
| 180/65-16 | 16″ | 5.00 – 6.00 | Touring / baggers |
| 200/50-18 | 18″ | 5.50 – 6.25 | Custom / performance cruisers |
How to Use This Chart (Step-by-Step)
Follow these four simple steps to use the chart correctly. Each step is short and practical so you can check sizes quickly.
- Find your bike’s factory size.
Look at the numbers stamped on the tire’s side or open your owner’s manual. That exact size is the starting point — write it down so you don’t mix it up. - Locate that size in the chart and check the rim diameter.
The chart shows which wheel diameter the tire fits. The tire and wheel diameter must match — if they don’t, the tire won’t fit. - Compare rim width with the chart’s recommended range.
The chart gives a rim-width range for each tire size. Make sure your wheel’s width falls inside that range; if it doesn’t, the tire may seat poorly or affect handling. - Use the conversion table if the formats differ.
If your bike lists sizes in inches but the chart uses millimeters (or vice versa), convert the numbers so you’re comparing the same formats.
Quick, important note: the chart is a helpful guide but not the final rule. Always double-check the tire maker’s fitment info and look for clearance, speed, and load rating issues before you buy or install. If anything seems uncertain, ask a mechanic — it’s safer than guessing.
Conclusion
Using a clear motorcycle tire size chart removes the guesswork. It helps you match sidewall numbers to the correct wheel, check rim compatibility, and spot possible fit or safety issues before you buy — so you spend less time worrying and more time riding.
Save this chart where you can get to it fast: print it, save a PDF to your phone, or bookmark this page before you shop. Having the chart handy makes comparing options and verifying fitment much quicker at the store or online.
Have a specific bike? Drop your make, model, and year (and current tire sizes if you can) in the comments and I’ll help confirm the right sizes or suggest safe alternatives. If you want, I can also make a printable PDF of the chart for you — tell me which format you prefer.
Frequently Asked Questions
Can I put a wider rear tire on my motorcycle?
Sometimes, but not always. A wider tire must fit your wheel and clear the swingarm and chain. Even if it fits physically, it can change how the bike handles. Always check your rim width and the tire maker’s recommendations before switching.
Can I use a different tire size than what’s listed in the manual?
It’s possible in some cases, but you should be careful. Small changes may work if they stay within the recommended rim range. Larger changes can affect stability, speedometer accuracy, and safety. When in doubt, stick to the original size.
Does tire size affect speedometer readings?
Yes, it can. If the new tire is taller or shorter than your original one, it can slightly change your speed reading. The difference is usually small, but it’s something to be aware of if you change aspect ratio or overall height.
What happens if I choose the wrong tire size?
Best case, the bike feels “off.” Worst case, the tire doesn’t fit safely. You might notice slower steering, reduced grip, rubbing against parts of the bike, or poor balance. It’s not worth guessing — double-check before buying.
Where can I find my current tire size?
Look at the sidewall of your tire. The size is printed as a series of numbers and letters, like 180/55ZR17. You can also find it in your owner’s manual.
Do front and rear tires use the same size?
Almost never. Most motorcycles use different sizes for the front and rear. Always check each tire separately before ordering replacements.
What do the letters in the tire size mean?
Letters usually show speed rating and construction type. For most riders, the key point is simple: make sure the new tire meets or exceeds your bike’s recommended rating. If you’re unsure, check the manufacturer’s specifications.
Is the tire size chart enough to guarantee fitment?
It’s a helpful guide, but it’s not the final word. Always confirm with your motorcycle manual and the tire manufacturer’s fitment chart. The chart helps you narrow it down — final verification keeps you safe.
