How did britains geography affects its industrial revolution?(1) proximity to France made it vulnerable to invasions during the reign of Napoleon. (2) its northern location minimized the effects of the little ice age. (3) coal and iron ore deposits were abundant and close to each other (4) trees covered most of the country, providing a renewable source of energy
2 comments: 1 what size is the rim, not the tire 2 you go bigger on back tires not front tires, you will change your ability to turn in and you already have a big heavy machine there.
Dimo J is correct.there are only 2 STANDARD 21' tire sizes, (narrow glide 21)80/90-21 (wide glide 21)90/90-21. Your 1.85 rim will take the 80/90 and the 2.15 will take the 90/90. Also just a simple correction21 is the rim DIAMETER not circumferencecircumference is the lenght AROUND the rim, radius x pi(3.14)
For the best performance I'd suggest you stay with the OEM tire size. The engineers who designed it know what's best for that bike. If you want to change the make of the tire there shouldn't be a problem as long as they're the same OEM size.
looks like you've answered your own question. good going, buddy
(3) coal and iron ore deposits were abundant and close to each other
