I put 11k on a set a while back and wore out the sides before the center. The 180-70 will correct the spedo error. Avon will have a new model comming out shortly that's made specifically for the GL1800
Are their any safety issues with this tire on a Gl1800?
Did the tire change the seat height?
I know that this tire corrects the spedo error but I have been reluctant to use this size because Honda says to use the 180-60 and I am not tire smart enough to make a decision regarding the change.
Any motorcycle manufacturer will tell you not to use a different tire size, it is potentially dangerous, now whether it really makes any difference or not...I don't really know. There is a possiblility that other size tire might require a slightly different size wheel.
If I recall correctly, MC tires are listed as width-sidewall ratio. So, a 180-60 is 180mm wide and the sidewall is 60% of that, making it 108mm. A 180-70 would give the a sidewall of 126mm. That would make a difference in seat height since the tire is taller, which is why the speedo is corrected. Hope this helps.
Since this is Friday and I have nothing to do, the following calculations were done to assist. Disclaimer: I have had only two cups of coffee and there may be some inconsistencies.
The overall width of the 180/70 is 180mm and the 180/60 is 178mm. The overall diameter of the 180/70 is 658mm while the 180/60 is 635mm. The 180/70 travels 824 revolutions per mile while the 180/60 travels 842 revolutions.
This means the 180/70 tire is .0787401574 inches wider and .9055118101 inches taller than the 180/60. It also means that at the same revolutions you get 2,793.60890413 feet or .52909259547 miles farther down the road with each mile on a 180/70.
Doesn't have a tire out for the wing yet, that I've heared of . They are supposed to have one sometime this year or early next. I wont put a tire not specficly for the ( WING)!!! To much riding on 2 tires for safety!!!!!!!!
to answer some of the questions about the venom.
i did not notice any difference in height of the bike.
it did seem to correct the speed o meter,and i should get better gas milage
its a much softer ride than the dunlop and seems to corner much better.
the sidewalls are suppose to be thicker. with the weight of the bike i like that
the reason i went to the venom. i spoke to a honda machanic and he recommended the tire.
i love my goldwing. 03 with 12000 miles