Harley-Davidson FLSTF Softail Fat Boy Tire Size
GarageDex's powersports data shows the Harley-Davidson FLSTF Softail Fat Boy runs a 140/75-R17 front tire and a 200/55-R17 rear tire. Tire sizes vary by year - see the table for each range.
Tire fitment by year
| Years | Front tire | Rear tire |
|---|---|---|
| 2012 | 140/75-R17 | 200/55-R17 |
| 2010 | - | 200/55-R17 |
| 2007-2008 | 140/75-R17 | 200/55-R17 |
1688cc. Tire sizes read as width / aspect ratio - rim diameter. Match all three numbers to the rim.
Tires for your Harley-Davidson FLSTF Softail Fat Boy
This bike runs a 140/75-R17 up front and a 200/55-R17 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 Harley-Davidson FLSTF Softail Fat Boy use?
GarageDex's powersports data shows the Harley-Davidson FLSTF Softail Fat Boy runs a 140/75-R17 front tire and a 200/55-R17 rear tire. Tire sizes vary by year - see the table for each range.
What do the tire numbers mean?
A size like 140/75-R17 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 Harley-Davidson FLSTF Softail Fat Boy tire sizes change by year?
Yes - fitment differs across the years we cover: 2012 runs 140/75-R17 front / 200/55-R17 rear; 2010 runs 200/55-R17 rear; 2007-2008 runs 140/75-R17 front / 200/55-R17 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.