So my F3 has a 150/60 on it right now and I can barely touch my feet to the ground. What will the height difference be when I get a 170/60?

 

it will be 9mm taller.

total OD of the 150 is 620mm while the 170 is 637mm. they do vary by manufacturer, but since it was not specified which, i'm using bridgestone specifications as a reference.

 

The second number is a percetage of the first number. So 150/60, 150mm wide 60% of that is the sidewall height= 90mm. So 170mm wide, 60% of that is 102mm sidewall height. 12mm higher than what you are now. 74Demon makes sense but I think his math is a little angle bo jangle.

 

you are correct in explaining what the aspect ratio is and means. it will be wider and have a larger sidewall, but that does not take into account the outer tread. the outside diameter is how big the tire actually is. you can put 2 tires that are the same size next to each other, and there can be a good difference in the actual size.

in this case, the difference is 17mm total. divide that by 2 (to account for only the bottom), you get 8.5mm. the bike will sit 8.5mm higher +or- a little for air pressure. if we can get what model tire he has and which he is getting, we can be more accurate.

 

I understand what you're saying now. Very well explained. Wasnt trying to step on you toes.

 

i know frank. i wasn't thinking you were. i should have explained myself better in the first place instead of just answering the question.

 

Thanks guys! So the difference shouldn't be that much. I will be getting either a Q2 or a shinko 006, 009. Also I should clarify that my feet are flat to the ground but just barely. Not on my toes at all lol.

 

just be aware that the 170 is "supposed" to be on a wider rim.

 

Well if the F2's tire is a 160 and is on a 4.5 inch rim, shouldn't the 170 be on the F3's 5 inch rim?

 

yes. according to dunlop, the q2 in a 170/60-17 fits 4.5 to 5.5 rims.

strange that a bridgestone bt-016 150/60 fits 4-4.5 (4.5 rec) while the 170/60 fits 5-5.5 (5.5 rec). doesnt matter because youre not using bridgestone, but they list specifications for the different tire sizes.