Five sided pentagon nut?

[Bradporter30]

Hi

can anyone help me with a Trek 7.0 fx hybrid bike. The wheel axles and seat height have seem to need a pentagon tool and all the bike tools I have are hexagon or Allen key? I can’t find anything on the internet. Am I missing something very obvious here?
Thanks

 

[rogerzilla]

Pic? Might have been replaced with a TranzX or similar security skewer set. Just buy one, as they are cheap.

 

[Drago]

Yes, you can freeky buy Pentagon sockets. Some car makers - particularly Vauxhall - use them insteadmof Torx as an anti-tamper fastener.

 

[Bradporter30]

Yes, you can freeky buy Pentagon sockets. Some car makers - particularly Vauxhall - use them insteadmof Torx as an anti-tamper fastener.

Thanks. I’ll try to buy one.