advantage of smaller wheels?
Posted June 29, 2004 - 05:32 PM
i want to switch to a 20" front and 18" rear for better traction off road, and hopefully a slightly lower seat height. would that drop the seat height much at all? these bikes are pretty tall. thanx for any info
Posted June 29, 2004 - 06:02 PM
So for 18" or 20' fronts the theory follows-
Plus side-The taller side wall allows less pinching of the tubes and dinks to the wheel.
Minus side- Because the side wall is taller it allows more flex when cornering, this equates to less precise steering.
Some of the pros played with a 20 inch front in MX but it has all but gone away. I think that speaks to it's effectiveness.
Posted June 30, 2004 - 04:01 AM
I would have thought that a larger wheel (tyre OD)
This is correct but the measurements here is the rim to outside of the tire measurements. The foot print measurement, distance accross the tire is what your looking for. On Dunlops it's the first number on the tire 110/100x18. So a 120/100x18 has a bigger foot print.
Now if you go bigger for traction you give up some too. The minus is clearance issues, cornering won't be as quick, and you will be carrying more weight on the end of the swing arm.
Posted June 30, 2004 - 04:23 AM
seems to me a 18" rear have more air volume than a 19", allowing a lower tire pressure
Posted June 30, 2004 - 04:22 PM
Then if the sidewalls of a 18'' makes the outside diameter the same as an 19. Then they are both the same in traction if the width is the same.
The 18'' rim is tougher than the 19. The larger the circle is, the easier it is to deform.
Then, I agree with endurodog on everything he said.
Posted June 30, 2004 - 05:10 PM
The minus of that is lower pressure can equal more flats. Wider tires, 120's or higher, are heavier and will be somewhat harder to turn.