It "should" be ok, I've done it in a pinch on supermoto track bikes even using a 160 tire. Then again, those are much lighter, and i didn't ride them on the road where would I crash into a guard railing or get under a truck if they failed....
I wouldn't go blasting the highway with them to avoid excessive heat build up, but if you take it easy you should be fine.
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12 690 Enduro-R, 12 Husaberg FE570, 09 KTM XC-F/ 450 RFS hybrid, 07 KTM 450 SMR, 09 BMW F650GS twin/F800GS hybrid, 03+05 YZF-R6