21 inch front and 17 inch rear

I'll give that a try.
Not too worried about a different rear tire right now, I only wanted the 21 for gravel running and some light off road.
I used to have a 650 dakar and it handled gravel very well with road tires.

I may even try a knobby on the 17" front and see how well that does.

Plenty have done that with good success too!

manybikes wrote:

Probably a dumb question but I have been unable to find a definitive answer.

I have the 250X and I also have a set of 21/18 inch rims and tires for dirt.

Can I skip swapping out the rear and ride off road with a 21" front and 17 " rear?

Thanks

Finally did the swap along with raising the front forks to compensate. I bought a 250x rotor to mount on the 21" rim so swapping will be very easy.


I raised the front forks 17.5 mm, so far this feels better than leaving the forks in the stock position. So far the X handles gravel much better with this setup, does not feel as planted as the 17" on the highway though.


Leaving the 17" rear on with a IRC 140/70 - 17, not exactly an adventure rated tire but it will do for now.Not easy finding a 140 wide aggressive tire, will a 150/70-17 fit ? like a Heideneau K73 ?


Here is a photo of the new tire for my 17" front, Heideneau K73 super rain 120/70 - 17. I have not ridden on it yet but I am hoping that because it is a 120 I will not have any rubbing issues. It measures the same width as my old 110. I am hoping that the 150/70-17 version of this tire will fit the rear without rubbing.

You could try a Mitas tyre assuming they are available there. I have a narrower 17" rear rim now but run an e09 dakar or a Dunlop 606.
The E09 according to the website is available in 120, 130,140 widths in 17". You should get around 10,000km out of them too with normal riding unless you flog and cook them.

Thanks for all the info Gany..very helpful.

Cheers