I had a damaged hub on my R. (2006)
Changed rear bearings twice this winter before retiring the XT from off road duties. It really is not up to more than light trails to be honest.
Discovered the hub damage while prepping the bike for European touring.
Friend of mine who damaged a hub doing off roading like me took 18 months to find a wheel for his R.
I thought I'd found one but when it arrived it was for an X. (2004 model)
I thought I'd see if it would fit; it does.
Turns out the X has the same swinging arm as the R until 2007.
Therefore all X wheels will fit an R up until 2007.
Looking at part numbers I think the X rim (& hub) is the same after 2007 despite the swing arm change so any X rear wheel should fit any R.
Anyway; here is my question.
I can squeeze a 130 tyre onto the X rim; it looks fine; 130 is the smallest tyre you should fit to a 4.25 rim though.
I have a good 10mm clearance either side so I think i can go to a 140.
Has anyone tried a 150 on the R rear wheel?
This would be too big for the R rim I know but fine for the X rim.

Grateful for any information before I buy any tyres
I'm planning on a K60.

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XT660R 2006