Yamaha YZ85 Tire Size
GarageDex's powersports data shows the Yamaha YZ85 runs a 70/100-17 front tire and a 90/100-14 rear tire. Tire sizes vary by year - see the table for each range.
Tire fitment by year
| Years | Front tire | Rear tire |
|---|---|---|
| 2012-2023 | 70/100-17 | 90/100-14 |
| 2011 | 70/100-M17 | 90/100-M14 |
| 2010 | 70/100-M17 | 90/90-M14 |
| 2008-2009 | 70/80-M17 | 90/90-M14 |
85cc. Tire sizes read as width / aspect ratio - rim diameter. Match all three numbers to the rim.
Tires for your Yamaha YZ85
This bike runs a 70/100-17 up front and a 90/100-14 at the rear. Match the size stamped on the sidewall (or shown in the table) - powersports tires are size-specific, so the numbers matter more than the brand.
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Frequently asked
What tire size does a Yamaha YZ85 use?
GarageDex's powersports data shows the Yamaha YZ85 runs a 70/100-17 front tire and a 90/100-14 rear tire. Tire sizes vary by year - see the table for each range.
What do the tire numbers mean?
A size like 70/100-17 reads as tread width (mm) / aspect ratio (% of width) - rim diameter (in). Match all three so the tire fits the rim and clears the swingarm and fender.
Do the Yamaha YZ85 tire sizes change by year?
Yes - fitment differs across the years we cover: 2012-2023 runs 70/100-17 front / 90/100-14 rear; 2011 runs 70/100-M17 front / 90/100-M14 rear; 2010 runs 70/100-M17 front / 90/90-M14 rear; 2008-2009 runs 70/80-M17 front / 90/90-M14 rear. Match your exact year in the table.
Can I fit a different tire size?
Stick to the stock size - it's matched to the rim width, speedometer, and handling. A wider tire can rub the swingarm or fender and throws off the speedo, so only deviate on a shop's advice.