Kona bicycle Owner's Manual page 17

• A hollow axle with a shaft ("skewer") running through
it which has a nut on one end and a fitting for a hex key,
lock lever or other tightening device on the other (through
bolt, fig. 9)
• Hex nuts or hex key bolts which are threaded on to or
into the hub axle (bolt-on wheel, fig. 10)
Your bicycle may be equipped with a different securing
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method for the front wheel than for the rear wheel.
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