Any have hints on how to get these on smoothly? SR crank and hard plastic screw in cap.

Thanks
Shawn

nope can't help .. leave it off, if you cannot figure it out..

maybe using these bolts will work better..

but if the simple act of putting a dust cap on, is puzzling..

hire a bike shop to do it for you ..


bolt,washer and covering the extractor thread all in one..
8mm hex , tightened with a long L wrench,
or a socket and ratchet handle..





..

Maybe some photos of what you have. Usually I start things like that by hand, then use tools for the final tightening. Be careful not to over-tighten.

These have a slot in them, right? I have always used the butt end of my Sugino chainring bolt tool to remove and install this type of cap, but any thin tool that fits the slot would work. Generally they should be no trouble screwing in, but since they are plastic it is easy for the ham-handed to cross thread the caps. If this is your problem, you may be able to clean the threads but if no success, just leave them off.

I like to place a drop of TriFlow in my crank arm threads before caps. I've had to remove too many stuck caps to risk more. I also find a quarter of a cone wrench make good cap screw drivers. Andy

The old Park CCW combo tool had both a screwdriver blade and a 5mm Allen in addition to the 14-15-16mm sockets to put everything you need in a single tool.

Plus one on using a quartet. Fits mine like it was made for it.
Just go slow and easy so you don't cross-thread the caps. Don't force them.
Jon

Chainring bolt remover tool fits them perfectly. Put some vasoline on the threads before re-installation.

Thank you all for your tips, except fietsbob.