I just had some Avon Roadriders installed this weekend and daddy likey.  I went with the 110/80 and the 140/70.  Maybe it is because my stock rear tire was worn into a square, but the bike is riding 1 or 2 inches higher now in the rear.  Anyway, so far so good with these tires.  I'm taking my time getting to the edges but the grip and the ride quality are a vast improvment over my 10-year-old stock Excedras.

I put the roadriders on last fall. I went with the 110/70 for the front, and so far I'm extremely happy with it.

I used the 140/70 rear because it is now sized for a 3.75" wheel so it's an equally good fit on the 3.5" and 4.0" wheels.  The 140/70 previously had a preferred rim width of 4.0".

I use the 110/80 front now mostly because my local supplier has the 110/70 tires when something new comes out and then drops that size the next year from stock.  Besides the 110/80 gives a more accurate speedo reading on the GS than the 110/70 does and I really don't notice the difference in handling.  My Lasertec fronts were 110/80 too.

Son JP put on the oem 110/70 and 130/70 size Roadriders on his GS, not really that much different.  The 140/70 looks a tad better too, not a good reason for choosing a different size though.   

The 140/70 AM26 is only 1/4" taller than the 130/70 so allowing for another 1/4 difference in tread depth from worn out to new, the bike should only be 1/2 taller at best.

I frequently read IMs late at night and wait till morning to answer and completely forget them, another senior moment, sorry Jerka.   

Quote from: gsJack on April 21, 2008, 08:31:45 AM
I frequently read IMs late at night and wait till morning to answer and completely forget them, another senior moment, sorry Jerka.   

No Problem.  My grandparents do that kinda stuff all the time.   

It might only be 1/2" more height on the rear, but the bike feels like it is a lot more than that.  I like it either way.

i have em as well  Love em 

Thanks again GSJack 

Quote from: Jerka on April 21, 2008, 07:26:03 AM
I just had some Avon Roadriders installed this weekend and daddy likey.  I went with the 110/80 and the 140/70.  Maybe it is because my stock rear tire was worn into a square, but the bike is riding 1 or 2 inches higher now in the rear.  Anyway, so far so good with these tires.  I'm taking my time getting to the edges but the grip and the ride quality are a vast improvment over my 10-year-old stock Excedras.

pics ? more than one view ?

For the Roadriders, the recommended sizes are for front 110/80-17 and for rear 140/70-17. Is that correct?

Quote from: Topnikko on May 20, 2008, 12:52:38 PM
For the Roadriders, the recommended sizes are for front 110/80-17 and for rear 140/70-17. Is that correct?

I put a 110/70-17 on the front, but that was just because it was the stock size. An 80 would be slightly taller, correct?

Quote from: gsJack on May 19, 2008, 04:59:25 PM
Theoretically,

A 110/70 tire is 110 x 70% = 77 mm tall
A 110/80 tire is 110 x 80% = 88 mm tall
A 120/70 tire is 120 x 70% = 84 mm tall
A 120/60 tire is 120 x 60% = 72 mm tall

A 120 mm tire on a 3.00" rim is 115 mm wide, preferred rim is 3.50"
A 110 mm tire on a 3.00" rim is 115 mm wide, preferred rim is 2.50"

So theoretically a 110/80 is same width and a little taller than the 120/70 when mounted on the 3.00" GS front rim.  Actual dimensions vary a little for different makes and models of tires. 

First 110/80 I put on my 97 GS rubbed the acorn nuts on the 2 screws that held the mudguard on the fender.  I turned the screws around putting their flat button heads on the inside and the acorn nuts on the outside and had no further problems with 110/80 tires on the 97.  My 02 GS doesn't have the mudguard and has clearance for the 110/80 tires I've run.

I prefer the 110/80 tires to the 120/70/65/60 tires on the GS, makes the speedo more accurate.     But the 120's should fit mounted on the GS 3.00" rim.  Don't forget a tire is 5 mm or .2" wider or narrower when mounted on a rim that is 1/2" wider or narrower than the preferred or measuring rim specified by the tires maker.

This may explain your question.