Posted 1/13/2016 10:10 PM (#87486) Subject: Going from a 21" to a 19" front tire, bad idea?????
Have been thinking about this and wanted to get thoughts, comments and feedback from the collective wisdom here.
Have a KLR650 rig with three different size tires: 17" on the rear, 21" on the front and a 19" on the sidecar. Am carrying a fully mounted spare 17" rear tire. That leaves the front and sidecar with no backup, two different sizes and no way to swap back and forth to get the most mileage out of each.
The OEM front tire is a 90/90-21. The sidecar tire is a 110/90-19.
What would be the pros and cons of having the front tire relaced with a 19" rim, and run a 110/90-19 tire up front, same as the sidecar tire?
Would this reduce trail and make steering easier? Not that steering is stiff now, but....
Could I go with a fatter front tire? What benefits would that have?
If this makes sense to do, who do recommend to do the lacing and any particular size/width rim?
I don't believe you will be able to feel a 2.5% drop in diameter, but I am no expert. Jay or Lonnie would be the guys to ask.
It should take some trail away and improve the handling if anything being a slightly smaller diameter.
Posted 1/15/2016 3:21 AM (#87502 - in reply to #87486) Subject: Re: Going from a 21" to a 19" front tire, bad idea?????
Location: Northern Germany
It is like Lonnie says.Not much different but in the favourable direction.
As long as your rig has the same hubs and brakedisc on front- and sidecarwheel it really would be an option if you like to carry a spare wheel.
Posted 2/14/2016 3:56 PM (#87906 - in reply to #87486) Subject: Re: Going from a 21" to a 19" front tire, bad idea?????
So I'm a little late to the party...just signed up today.
IMO, you will need a spare wheel that you can attach either the front OR sidecar rotor to. Typically the front brake will be the biggest, and the one to the side will be smallest, unless you're using a proportioning valve and a shared master cylinder (I speculate). This is what Ural is doing with their "universal spare" on the 3-disc '14 and newer rigs. You bolt on the disc from the wheel being replaced.
I'm considering going with 18" wheels all the way around on my F800GSA, and it's going to take some head scratching and cash to make it happen.