MountainBikeDude
Well-Known Member
21's don't have a lot of tire options, so 20" would be the most compatible across a wider variety of tire variants.
This was a huge issue for early R1 deliveries that opted for the 21" range wheel and tire option. Only Pirelli supported it.
Exactly.Until tire industry catches up, there is only one tire option in 225/55R21. The stock tire.
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