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Is it ok for a different sized front tire?

4 posts Started 29 May 2025 Last recovered post 3 Jul 2025 Wayback Machine snapshot 15 May 2026

#1

I got some tires coming from mail order and I messed up on the sku for them.  Stock the 90 vfr takes a 120/70-17 tire.  I have a 120/60-17 tfront tire coming.   Did I screw myself or is this an OK substitution for the front.  It is a Sportmax Q5A and the rear will be a Q5A  180/55-17.  I've run the 180 rear for years on this bike.

Thanks for any input from the group.

Nick

#2

While I prefer the 120/70, a 120/60 is acceptable.  Less sidewall, smaller diameter when comparing the same brand/model.

180/55 is perfectly suited for a 5.5" rear rim.    It is rider preference between that and a 170/60.  

You might actually be restoring some geometry with that 120/60 front used in conjunction with the 180/55 rear.  But losing some ground clearance.

#3

Thanks Captain...

#4

I ran that profile years ago, and under deceleration around 40~30 mph the 3rd Gen got a little bit of speed wobble type headshake, every time and got worse as the tire wore. The problem went away when I went to a 70 series tire. This was the original Dunlop Sportmax tire from 1992, maybe could have just been a bad tire as I'm sure there are bikes that run that tire without issue, hence why they make them...

End of thread · 4 posts recovered Wayback Machine snapshot 15 May 2026