Just out of curiosity spurred on by this thread and cbergeron's new set of tires, I've been searching the net for the skinniest set of wheels and tires around.
DOT approved (legal):
Firestone F560 125/?/15
Classic tire from www.cokertire.com
Width ~4.92"
Max PSI unknown (~35?)
Temporary (illegal)
Continental 105/95 r17
Width ~4.13"
Max PSI unknown
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As far as I've found, the skinniest tire (in mm) per rim size is:
Legal
13" - 155
14" - 117 (?)
15" - 135
16" - ?
17" - ?
Illegal
13" - ?
14" - 117 (?)
15" - 115
16" - 115
17" - 105
If anyone is aware of smaller sizes, feel free to post.
- LostCause