What is the black plastic circle on wheel axle nut?










16















I have been seeing a black plastic part on the nuts of the wheels. My bike also has this. I think I have seen this only on old bikes. Does it have a name and purpose?



old bicycle with black nut cover



Some close up:



black plastic nut cover 1black plastic nut cover 2










share|improve this question



















  • 1





    Perhaps to be able to unscrew the nuts without having to use a wrench? I'm curious to see some other answers. They also kind of look like the covers that are use when shipping wheels so the axles don't punch through the box but you wouldn't leave those on, and they look a little different. Do you have an up-close picture of them as well?

    – Nate W
    Aug 27 '18 at 15:27












  • @NateW if they're plastic I wouldn't think they're durable enough to repeatedly unscrew the nut

    – Swifty
    Aug 27 '18 at 21:53











  • @Swifty a valid point

    – Nate W
    Aug 28 '18 at 14:54















16















I have been seeing a black plastic part on the nuts of the wheels. My bike also has this. I think I have seen this only on old bikes. Does it have a name and purpose?



old bicycle with black nut cover



Some close up:



black plastic nut cover 1black plastic nut cover 2










share|improve this question



















  • 1





    Perhaps to be able to unscrew the nuts without having to use a wrench? I'm curious to see some other answers. They also kind of look like the covers that are use when shipping wheels so the axles don't punch through the box but you wouldn't leave those on, and they look a little different. Do you have an up-close picture of them as well?

    – Nate W
    Aug 27 '18 at 15:27












  • @NateW if they're plastic I wouldn't think they're durable enough to repeatedly unscrew the nut

    – Swifty
    Aug 27 '18 at 21:53











  • @Swifty a valid point

    – Nate W
    Aug 28 '18 at 14:54













16












16








16








I have been seeing a black plastic part on the nuts of the wheels. My bike also has this. I think I have seen this only on old bikes. Does it have a name and purpose?



old bicycle with black nut cover



Some close up:



black plastic nut cover 1black plastic nut cover 2










share|improve this question
















I have been seeing a black plastic part on the nuts of the wheels. My bike also has this. I think I have seen this only on old bikes. Does it have a name and purpose?



old bicycle with black nut cover



Some close up:



black plastic nut cover 1black plastic nut cover 2







wheels






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Aug 30 '18 at 7:48







nimcap

















asked Aug 27 '18 at 14:59









nimcapnimcap

2277




2277







  • 1





    Perhaps to be able to unscrew the nuts without having to use a wrench? I'm curious to see some other answers. They also kind of look like the covers that are use when shipping wheels so the axles don't punch through the box but you wouldn't leave those on, and they look a little different. Do you have an up-close picture of them as well?

    – Nate W
    Aug 27 '18 at 15:27












  • @NateW if they're plastic I wouldn't think they're durable enough to repeatedly unscrew the nut

    – Swifty
    Aug 27 '18 at 21:53











  • @Swifty a valid point

    – Nate W
    Aug 28 '18 at 14:54












  • 1





    Perhaps to be able to unscrew the nuts without having to use a wrench? I'm curious to see some other answers. They also kind of look like the covers that are use when shipping wheels so the axles don't punch through the box but you wouldn't leave those on, and they look a little different. Do you have an up-close picture of them as well?

    – Nate W
    Aug 27 '18 at 15:27












  • @NateW if they're plastic I wouldn't think they're durable enough to repeatedly unscrew the nut

    – Swifty
    Aug 27 '18 at 21:53











  • @Swifty a valid point

    – Nate W
    Aug 28 '18 at 14:54







1




1





Perhaps to be able to unscrew the nuts without having to use a wrench? I'm curious to see some other answers. They also kind of look like the covers that are use when shipping wheels so the axles don't punch through the box but you wouldn't leave those on, and they look a little different. Do you have an up-close picture of them as well?

– Nate W
Aug 27 '18 at 15:27






Perhaps to be able to unscrew the nuts without having to use a wrench? I'm curious to see some other answers. They also kind of look like the covers that are use when shipping wheels so the axles don't punch through the box but you wouldn't leave those on, and they look a little different. Do you have an up-close picture of them as well?

– Nate W
Aug 27 '18 at 15:27














@NateW if they're plastic I wouldn't think they're durable enough to repeatedly unscrew the nut

– Swifty
Aug 27 '18 at 21:53





@NateW if they're plastic I wouldn't think they're durable enough to repeatedly unscrew the nut

– Swifty
Aug 27 '18 at 21:53













@Swifty a valid point

– Nate W
Aug 28 '18 at 14:54





@Swifty a valid point

– Nate W
Aug 28 '18 at 14:54










2 Answers
2






active

oldest

votes


















28














Those look like packing pieces used to stop the axle ends from punching through the cardboard box partially assembled bikes are delivered in.



I'd imaging they are being used to stop the axle nuts getting scuffed or scratched.






share|improve this answer


















  • 1





    That's exactly what they are. They can be removed and discarded, or they can be saved in case the bike needs to be shipped in the future.

    – Carey Gregory
    Aug 27 '18 at 17:57











  • Packing protections. Some might leave them on as a kind of protection, scratching of objects or cuts from edges.

    – Carel
    Aug 27 '18 at 17:58











  • Note that some of them replace the quick release skewer so you need to put that skewer back on.

    – RoboKaren
    Aug 27 '18 at 21:08






  • 1





    I am kind of disappointed by the truth, I was expecting it to be so much more after seeing it on many bikes :)

    – nimcap
    Aug 31 '18 at 13:22


















10














The flattened black plastic disks are packing covers as the other answer attests. You see these on low-end bikes in a box because ... well.. they come flatpacked in a box.



But some bikes come with decorative nut covers — especially for through-hole, bolted axles. This helps hide the exposed bolt and makes it less likely you’ll scrape your leg against the exposed threads. I see this on ”mom bikes” in Japan where there are hardly any quick releases.






share|improve this answer




















  • 1





    Do you have a close up shot of the decorative type? I’m apprehensive of googling decorative nut covers ;)

    – Swifty
    Aug 31 '18 at 17:56










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2 Answers
2






active

oldest

votes








2 Answers
2






active

oldest

votes









active

oldest

votes






active

oldest

votes









28














Those look like packing pieces used to stop the axle ends from punching through the cardboard box partially assembled bikes are delivered in.



I'd imaging they are being used to stop the axle nuts getting scuffed or scratched.






share|improve this answer


















  • 1





    That's exactly what they are. They can be removed and discarded, or they can be saved in case the bike needs to be shipped in the future.

    – Carey Gregory
    Aug 27 '18 at 17:57











  • Packing protections. Some might leave them on as a kind of protection, scratching of objects or cuts from edges.

    – Carel
    Aug 27 '18 at 17:58











  • Note that some of them replace the quick release skewer so you need to put that skewer back on.

    – RoboKaren
    Aug 27 '18 at 21:08






  • 1





    I am kind of disappointed by the truth, I was expecting it to be so much more after seeing it on many bikes :)

    – nimcap
    Aug 31 '18 at 13:22















28














Those look like packing pieces used to stop the axle ends from punching through the cardboard box partially assembled bikes are delivered in.



I'd imaging they are being used to stop the axle nuts getting scuffed or scratched.






share|improve this answer


















  • 1





    That's exactly what they are. They can be removed and discarded, or they can be saved in case the bike needs to be shipped in the future.

    – Carey Gregory
    Aug 27 '18 at 17:57











  • Packing protections. Some might leave them on as a kind of protection, scratching of objects or cuts from edges.

    – Carel
    Aug 27 '18 at 17:58











  • Note that some of them replace the quick release skewer so you need to put that skewer back on.

    – RoboKaren
    Aug 27 '18 at 21:08






  • 1





    I am kind of disappointed by the truth, I was expecting it to be so much more after seeing it on many bikes :)

    – nimcap
    Aug 31 '18 at 13:22













28












28








28







Those look like packing pieces used to stop the axle ends from punching through the cardboard box partially assembled bikes are delivered in.



I'd imaging they are being used to stop the axle nuts getting scuffed or scratched.






share|improve this answer













Those look like packing pieces used to stop the axle ends from punching through the cardboard box partially assembled bikes are delivered in.



I'd imaging they are being used to stop the axle nuts getting scuffed or scratched.







share|improve this answer












share|improve this answer



share|improve this answer










answered Aug 27 '18 at 15:46









Argenti ApparatusArgenti Apparatus

35.8k23891




35.8k23891







  • 1





    That's exactly what they are. They can be removed and discarded, or they can be saved in case the bike needs to be shipped in the future.

    – Carey Gregory
    Aug 27 '18 at 17:57











  • Packing protections. Some might leave them on as a kind of protection, scratching of objects or cuts from edges.

    – Carel
    Aug 27 '18 at 17:58











  • Note that some of them replace the quick release skewer so you need to put that skewer back on.

    – RoboKaren
    Aug 27 '18 at 21:08






  • 1





    I am kind of disappointed by the truth, I was expecting it to be so much more after seeing it on many bikes :)

    – nimcap
    Aug 31 '18 at 13:22












  • 1





    That's exactly what they are. They can be removed and discarded, or they can be saved in case the bike needs to be shipped in the future.

    – Carey Gregory
    Aug 27 '18 at 17:57











  • Packing protections. Some might leave them on as a kind of protection, scratching of objects or cuts from edges.

    – Carel
    Aug 27 '18 at 17:58











  • Note that some of them replace the quick release skewer so you need to put that skewer back on.

    – RoboKaren
    Aug 27 '18 at 21:08






  • 1





    I am kind of disappointed by the truth, I was expecting it to be so much more after seeing it on many bikes :)

    – nimcap
    Aug 31 '18 at 13:22







1




1





That's exactly what they are. They can be removed and discarded, or they can be saved in case the bike needs to be shipped in the future.

– Carey Gregory
Aug 27 '18 at 17:57





That's exactly what they are. They can be removed and discarded, or they can be saved in case the bike needs to be shipped in the future.

– Carey Gregory
Aug 27 '18 at 17:57













Packing protections. Some might leave them on as a kind of protection, scratching of objects or cuts from edges.

– Carel
Aug 27 '18 at 17:58





Packing protections. Some might leave them on as a kind of protection, scratching of objects or cuts from edges.

– Carel
Aug 27 '18 at 17:58













Note that some of them replace the quick release skewer so you need to put that skewer back on.

– RoboKaren
Aug 27 '18 at 21:08





Note that some of them replace the quick release skewer so you need to put that skewer back on.

– RoboKaren
Aug 27 '18 at 21:08




1




1





I am kind of disappointed by the truth, I was expecting it to be so much more after seeing it on many bikes :)

– nimcap
Aug 31 '18 at 13:22





I am kind of disappointed by the truth, I was expecting it to be so much more after seeing it on many bikes :)

– nimcap
Aug 31 '18 at 13:22











10














The flattened black plastic disks are packing covers as the other answer attests. You see these on low-end bikes in a box because ... well.. they come flatpacked in a box.



But some bikes come with decorative nut covers — especially for through-hole, bolted axles. This helps hide the exposed bolt and makes it less likely you’ll scrape your leg against the exposed threads. I see this on ”mom bikes” in Japan where there are hardly any quick releases.






share|improve this answer




















  • 1





    Do you have a close up shot of the decorative type? I’m apprehensive of googling decorative nut covers ;)

    – Swifty
    Aug 31 '18 at 17:56















10














The flattened black plastic disks are packing covers as the other answer attests. You see these on low-end bikes in a box because ... well.. they come flatpacked in a box.



But some bikes come with decorative nut covers — especially for through-hole, bolted axles. This helps hide the exposed bolt and makes it less likely you’ll scrape your leg against the exposed threads. I see this on ”mom bikes” in Japan where there are hardly any quick releases.






share|improve this answer




















  • 1





    Do you have a close up shot of the decorative type? I’m apprehensive of googling decorative nut covers ;)

    – Swifty
    Aug 31 '18 at 17:56













10












10








10







The flattened black plastic disks are packing covers as the other answer attests. You see these on low-end bikes in a box because ... well.. they come flatpacked in a box.



But some bikes come with decorative nut covers — especially for through-hole, bolted axles. This helps hide the exposed bolt and makes it less likely you’ll scrape your leg against the exposed threads. I see this on ”mom bikes” in Japan where there are hardly any quick releases.






share|improve this answer















The flattened black plastic disks are packing covers as the other answer attests. You see these on low-end bikes in a box because ... well.. they come flatpacked in a box.



But some bikes come with decorative nut covers — especially for through-hole, bolted axles. This helps hide the exposed bolt and makes it less likely you’ll scrape your leg against the exposed threads. I see this on ”mom bikes” in Japan where there are hardly any quick releases.







share|improve this answer














share|improve this answer



share|improve this answer








edited Aug 31 '18 at 16:04

























answered Aug 27 '18 at 20:59









RoboKarenRoboKaren

23.4k856133




23.4k856133







  • 1





    Do you have a close up shot of the decorative type? I’m apprehensive of googling decorative nut covers ;)

    – Swifty
    Aug 31 '18 at 17:56












  • 1





    Do you have a close up shot of the decorative type? I’m apprehensive of googling decorative nut covers ;)

    – Swifty
    Aug 31 '18 at 17:56







1




1





Do you have a close up shot of the decorative type? I’m apprehensive of googling decorative nut covers ;)

– Swifty
Aug 31 '18 at 17:56





Do you have a close up shot of the decorative type? I’m apprehensive of googling decorative nut covers ;)

– Swifty
Aug 31 '18 at 17:56

















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