Pirelli MT21 Rear on '14 350 XCF-W?

[MrHix]

Has anyone tried to put a 140/80 18 MT21 rear tire on a '14 350 XCF-W? I would like to know if it will fit in the swingarm, length and width.

I am running a 4.00x18 MT43 now and it fits well. It looks like the MT21 is about the same diameter and about 1/2" wider than the MT43.

Thanks,

[Savage]

If it fits I'm almost positive it will rub the muffler.

[MrHix]

If my ghetto engineering measurement by laying a 1 x 2 along the sidewall of the MT43 is accurate, I have 3/4" + 1/4" clearance to the silencer right now.

I only have about 1/2" clearance on the swingarm mud flap with the MT43, but I don't know how much the MT21 will expand at speed (if any) with 10 - 12 psi. The MT43 is OK with 8 psi.

Cheers,

[Ed M]

Mr Hix are we talking about a Michelin Tire or the Pirelli MT21 tire? The reason I ask is that Michelin has odd sizing for their off-road tires (copied from Rocky Mountain ATV website)

Michelin tire size 120/80x19 = 100/90x19 Conventional sizing
Michelin tire size 120/90x18 = 100/100x18 Conventional sizing
Michelin tire size 130/70x19 = 110/90x19 Conventional sizing
Michelin tire size 130/80x18 = 110/100x18 Conventional sizing
Michelin tire size 140/80x18 = 120/100x18 Conventional sizing
Michelin tire size 90/90x21 = 80/100x21 Conventional sizing
I have a set of Michelin S-12's that I have mounted on my spare wheel set for my 13 350XCF-W for mud riding. Rear tire I use is a 130/80-18, plenty of clearance.

Did a google search and found that some euro model EXCs came stock with a Maxxis 140/80-18 tire but couldn't pinpoint the exact year and model to verify rim size - clearance.

[MrHix]

Sorry, I am talking about the Pirellis.

[MrHix]

It fits fine.

Cheers,

[Ed M]

Thanks for posting this, I am also considering the MT21's for my 13' 350XCF-W for dual sporting in the future

[Savage]

Front MT21's work great everywhere and last well. Once it wears down you can flip it. I've never tried the rear.

[MrHix]

I was down at St Joe Park yesterday and the MT21 seemed to work pretty good in all conditions: sand, mud, hardpack, rocky. I ran 12 psi and will try 10 psi later to see if there is a little more sidewall flex left in the tire. Jumping a few logs made the rear end kick more than I like.

Cheers,