Smaller wheels are lighter and easier to maneuver, larger wheels are faster and more stable.
A higher durometer means a harder wheel (97-103a) slides more and is better for tricks. Lower durometer (78-87a) is softer and more suited for cruising.
Please note that Bones STF and SPF wheels use a "B" durometer scale and are all on the harder side, and 81-84b Bones wheels are similar to 99-103a durometer.
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