I want a matching set.

[rlong74]

After my last ride my IRC durotour is shagged. It's size is 110/90-17. I have a Avon RoadRider on the front and would like to match the rear. Unfortunately the closest Avon makes is a 120/80-17.
Anyone foresee any problems? It looks like it will fit but I wanted to check here first.
Or should I say. Has anyone done this?
It's only 5mm on either side right? and a slightly lower profile.
Thanks.

[Dibber]

My 81 GS450T had a 130/80-17 on the back and it fit. I didn't like it much as it was really close to touching the sides of the swing arm and the chain guard. So close the previous owner didn't even out tire during chain adjustment causing the tire to wear uneven and caused a high speed wobble. The 120 should work, just don't go any bigger.

[Steve]

The problem is not so much how much clearance there is to the sidewalls, it's how wide is the rim that is supporting the tire?

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[rlong74]

Thanks guys.

[rlong74]

My 81 GS450T had a 130/80-17 on the back and it fit. I didn't like it much as it was really close to touching the sides of the swing arm and the chain guard. So close the previous owner didn't even out tire during chain adjustment causing the tire to wear uneven and caused a high speed wobble. The 120 should work, just don't go any bigger.

was the difference in profile that noticeable front to back? between the 90 and 80. assuming you had the 90/90-19 up front.