TM Racing MX 85 Junior Tire Size
GarageDex's powersports data shows the TM Racing MX 85 Junior 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 |
|---|---|---|
| 2019 | 70/100-17 | 90/100-14 |
| 2011 | 70/100-17 | 90/100-14 |
| 2008 | 70/90-x17 | 90/90-x14 |
| 2007 | 70/100-17 | 90/100-14 |
| 2005 | 70/100-17 | 90/100-14 |
85cc. Tire sizes read as width / aspect ratio - rim diameter. Match all three numbers to the rim.
Tires for your TM Racing MX 85 Junior
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 TM Racing MX 85 Junior use?
GarageDex's powersports data shows the TM Racing MX 85 Junior 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 TM Racing MX 85 Junior tire sizes change by year?
Yes - fitment differs across the years we cover: 2019 runs 70/100-17 front / 90/100-14 rear; 2011 runs 70/100-17 front / 90/100-14 rear; 2008 runs 70/90-x17 front / 90/90-x14 rear; 2007 runs 70/100-17 front / 90/100-14 rear; 2005 runs 70/100-17 front / 90/100-14 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.