Chris Nolte
Well-Known Member
That's correct, it is a standard covered nut on the axle for the ST1 and you do need to cut the zip ties to remove and replace after, although you could get by without them for a bit in a pinch as it's covered by neoprene.I don't know if I see it correctly but the ST1 (I think) has a regular lug nut to hold rear wheel. In order to remove the rear wheel you need a regular wrench and you need something to cut the zip ties holding the wiring and you need new zip ties to fasten the wiring after a flat tire has been repaired.
In the ST2 photo it appears at least from this side that you'd need a hex...perhaps it even has an improved drop wheel solution.
It appears from this image the ST2 uses a thru-axle design similar to the Specialized Turbo. This is very common on higher end mountain bikes and motorcycles.