Clever tool to bail out if you do press the pin too far out. Some chain tools (Park's CT-3 for example) have a travel limit stop to keep you from pressing a pin all the way out of the chain's sideplate for chains with reusable pins.
Also, all modern 7/8-speed and above derailleur chains must not have an original pin reinstalled whether it's pressed partially or all the way out. The old pin must be removed and replaced with a specific joining pin or a master link.
Originally Posted by HillRider
Good input. I should have mentioned master links and replacement pins as well. Sometimes sitting on the side of the road you have to do what you can to get underway, and to a bike shop. Shortening your chain a link and avoiding the big ring will get you moving at least, or if your rear derailleur fails maybe a lot of links to make it a one speed. Or walking L
This chain sample shown was actually off a 9 speed cassette and for sure don’t reuse any pins against recommended practice for long term usage. Without some lineup means it is virtually impossible to re-insert that pin on the road.
modern 9 and 10 speed chains are fussy you may get away with more on 7 speed chains.
but the riveting of the pins keeps them from blowing out.
you stretch the side plate pressing it out. then realistically,
the head has to be expanded further
If you don't force shifts, after this field fix, it should get you back to a town..
on the road cures are temporary, replace the chain ASAP.
with practice , you learn how to press the pin so as to remain in the last plate,
ideally leaving it just a scosh proud, so the inner link would snap over that nub.
and stay there while you press the pin back in.
Last edited by fietsbob; 08-23-11 at 10:58 AM.
Low car diet
Nice idea, but I'd rather carry a master link with my chain tool. Like others have said, modern chains shouldn't be re-connected with the same pin, so drive it and the adjacent pin on the outer link completely out, and install a master-link for a permanent fix.
Originally Posted by slopvehicle