Avon Rear AM42 Venom 170/80H15 BLK AV-338
Avon Front AM42 Venom 100/90H18 BLK AV-324

Stock Front is 110/80

A 100/90 is the same as 100mm x 90%= 90mm sidewall height,
while the 110/80 is 88mm in height,
so only 2mm height difference.

Blowing gravel off rural roads