IRD Defiant quesion \ confusion...
 

Description taken off of retro-gression:

• fits JIS square taper bottom brackets (110mm for most set-ups)

The "most set-ups" part has me scratching my head. I'm buying them to use on my 1st build. It'll be used on the Leader 722 I just bought from retro-gression. Should I be looking for a different size BB or am I lumped into the "most set-ups" category?

It has nothing at all to do with what frame you have.

As long as you'll be using a rear hub that will give you a 42mm (ish) chainline, you should use a 68mm English-threaded JIS square taper BB with 110mm spindle.

Thx. I should be good then since I'll be using a Formula hub or something rebranded.

Just picked up a Shimano UN55 to go along with my Defiants. Think I bought the right type but still second guessing myself. Please put me and ease experts.

If it's 68x110mm, you're good.

Yes it is. Gracias Scrod.

I was more confused about the tapering.

No prob.

When you install them, don't grease the spindle before you put on the arms. You should only grease a splined spindle.

Free knowledge. I love it.

Oh right on. Yeah, the UN55 has a JIS taper so you're all set.

How does one figure out what chainline you'll have based on your hubs?

Oh crap, this is a TIL for me. I definitely greased mine lol. D'oh.

Because of variances from one brand of cog to another, there is no actual standard - which is why I said 42(ish).

Clean it off. Greasing a square-taper makes over-torquing the crank arms much easier, which can cause the interface to slide too far onto the spindle and become misshapen.

What is the proper torque?

I'm fairly certain crank arm bolts on Shimano BBs should be somewhere between 310-390 in-lb. Did your cranks or BB come with a tech sheet?

The BB did. I'll check it when I get home. All these questions should go into the Ask Scrod post.

proper torque force for the part is useless without a torquimeter amiright?

My mind is a torquemeter.

Torque = 485 - 608 in lbs

I used this BB with my new Def crankset:

http://www.interlocracing.com/bbs.html

It came with a nice tech sheet with all the numbers you need to know...

And the price was right, too. That's a nice looking crankset.

That seems a bit high. I use 33 ft-lbs (400 in-lbs) on all my square taper cranks.

More like sub-forum Torquemada:

http://www.texemarrs.com/images/torquemada1.jpg

The grimace is similar, but the hair's a bit off. Scrod, you gonna rock the tonsure any time soon?

hahaha

I always followed greasing square tapers. Jobst Brandt is in favor of it and his reasons seems to make more sense than the reasons used by those in favor of dry installations.

http://sheldonbrown.com/brandt/installing-cranks.html