Originally Posted by Blue&Yellow
Thanks! Is it worth it going to a 18 rear wheel as well in your opinion? Or is there good 17 rear tires with the right profile available? I'm worried about the chassi being tilted too far backward so to speak
Or just drop the forks and be done with it?
If it was me, I'd do the 18/21 combo. One reason being as you said the 21 front with the 17 rear will raise the front more than the 18/21 would. You could drop the forks, but that seems to be counter productive if the height of the bike isn't an issue for you.
Also, my DR650 has 17/21 and there just isn't as good as tires available in the 17" rear size. I really wish it had an 18" rear. Plus most of the small DS bikes that use a 100 or 110 rear tire also are in the 18" size. XT225, XT255, WR250R, KL250 (Sherpa), KLX250, CRF230L, CRF250L, etc all use an 18" rear. Not sure what you will find in the 17" dirt size tires.
Isn't the 17" rear SM wheel wider than the 18" dirt bike wheel too? That might cause issues with clearance going to a larger 17" knobby tire on the rear?