motorapido

I will be installing an IGH on a vintage frame with horizontal dropouts. My existing cassette-hub wheel axle sits entirely at the back of the dropouts, which gives me room to run a 38mm tire. When switching to an IGH, I would like to retain my clearance for a 38mm tire. This means pulling the axle to the far back of the dropouts. This seems to indicate that I will have to run a chain tensioner, unless I am able to get lucky enough to achieve sufficient chain tension when the axle is pulled to the back of the dropouts. As a first-timer to setting up an IGH, I have been searching for information on the ideal chain tension, and have not done too well. What is the rule of thumb for measuring adequate chain tension?

Also, if I go a little slack on the tension, but have a bash guard outboard of the chainring and a drop-stopper inboard, and the Shimano cog on the hub with the dual chain guards, am I OK without a chain tensioner if the chain does not end up with the ideal minimum tension?

Forgive my ignorance on all-things-chain-tension, since I have been a derailleur man for all but my first few years of bicycle riding.

fietsbob

why double post?

motorapido

This seems to happen to me when I post using an Android tablet. Dunno why. Never happens on other forums.

JohnDThompson 

If you have at least 12mm of adjustment in the dropout slot, you should be able to use a half-link to get the proper chain length without a tensioner.

FBinNY 

I know you can delete posts, but I don't believe that it's possible to delete your own original post starting a thread. What you can do is flag the original post and use the comments box to tell the mods it's a duplicate thread and ask it to be closed or deleted.

Otherwise you can add a redirect link to the original thread to keep everything in one place. I'll do it here, but you might want to edit the original to say it's a dup and redirect people.

DUPLICATE THREAD, PLEASE GO TO THE ORIGINAL