[Spunger]

I was lookin through an old copy of MBA and saw that on a Turner test bike, a DHR, the truvativ cranks had self extracting crank bolts.

I have the holzfellers, same cranks, but normal bolts. Just wondering if there's any advantages to running self extracting crank bolts? Do they hold the arms onto the bottom bracket better?

Just a curious question. If all they allow you to do is remove the crank arms without the use of a tool then no biggy, but if they serve some other purpose that I dunno about it'd be good knowledge

 

[dexterq20]

They serve 2 purposes: 1) They eliminate the need for a crank puller. 2) They give you another piece on your bike that will inevitably fall out while riding, therefore negating the fact that you don't need a crank puller.

 

[Brian HCM#1]

They suck don't waste your time with them. I installed them because I love the way Shimano's work. Well when I when to pull the crank arm off the aluminum shell that holds the bolt ripped out of the crank arm almost destroying the threads on my Middleburn cranks. I quickly disposed of the other side and reinstalled the original crank bolts.

 

[Spunger]

lol ok ok, note to self...

NO SELF EXTRACTING CRANK BOLTS

I thought it was kinda odd. It was a MBA article on Colin Bailey's 2003 Turner DHR. I was lookin at his bike and was like, WTF, why'd they use those bolts on the crank? I thought something was fishy so I figured I'd ask.

And please don't ask what I was doing looking at 2003 issues of MBA, I can read the same issue over and over again, as old ones become TRM (toliet reading material)

 

[-dustin]

i've only seen self-extracting bolts in lower end cranks. is there a reason behind that?