Hello pljones1k,

Unfortunately the tire for the Ryobi BS902 and BS903 cannot be used on the BS901. The old part number for the BS901 tire is BS90104200 maybe someone out there has some or a suitable replacement.

Good luck,
-WJA

I too tried to find these parts, and had no luck. I came up with an idea to use rubber bands. I came across a rubber band that had the thickness I needed, and finally got it streched out to fit. It was orginally 1and1/2 inch wide and 7 inches long. I carefully cut it in half and made 2 bands. So after reading that others were having the same problem, I googled rubber bands and I found one that might work for everyone else. It is 7"x5/8'"x1/16" thick. You can get a box of 50 for $9.00.
link removed

I too tried to find these parts, and had no luck. I came up with an idea to use rubber bands. I came across a rubber band that had the thickness I needed, and finally got it streched out to fit. It was orginally 1and1/2 inch wide and 7 inches long. I carefully cut it in half and made 2 bands. So after reading that others were having the same problem, I googled rubber bands and I found one that might work for everyone else. It is 7"x5/8'"x1/16" thick. You can get a box of 50 for $9.00.
link removed