Steels comparison

[marin man]

My v brake bolts are ally and no probs.....also cable pinch bolts are alloy and mech mountig bolts and jockey bolts are alloy.....

ti stem bolts though and ti seatclamp bolt and seat securing bolt etc etc....

All holding out well

 

[raymondluxuryyacht]

Curious about the bottle bosses. What would you expect the time to failure of aluminium bolts to be in that kind of situation ? I had been riding with alu bolts there for years ! ...just switched them to titanium last week, but only because I had a couple of spares knocking about. I left the alloy ones in the second set of bosses that aren't holding a cage though.

p.s. worth moving this thread to retro mtb chat ??

 

[hydorah]

My v brake bolts are ally and no probs.....also cable pinch bolts are alloy and mech mountig bolts and jockey bolts are alloy.....

ti stem bolts though and ti seatclamp bolt and seat securing bolt etc etc....

All holding out well

Yeah it's a risk thing, not guaranteed imminent death!

Sadly with failures, you will often not get any warning and you can't really look out for signs of stress/fatigue cos it's inside the brake assembly where this stuff would happen

Ti bolts are now available in pretty colours from people like tastynuts

BTW: I was only mucking about with the bottle cages bolts comment

 

[WD Pro]

Rear canti / v brake mounting bolts would be fine - very little stress on them, unless you ride backwards a lot

I wouldn't entertain them on the front - maybe if the brake was mounted on the back of the fork :?

Lots of other considerations in specing a bolt, how the load is applied etc

WD

 

[Xesh]

My Syncros stem bolt is aluminium alloy and that seems OK after all this time.

 

[mikee]

i wouldnt use alloy for cable clamp bolts
aluminium fails catastrophically
also the torque required to clamp a cable properly
is higher than other applications
it also wont fail in the garage but on that reall fast down hill

 

[marin man]

Most cable pinch bolts thread into alloy though mikee..... :?

And the cable pinch bolt on my pauls mech is alloy and original to it and still ok :?

 

[WD Pro]

Quite a big difference in force and hence required clamping load between a mech and brakes though :? And a big difference in consequence if they fail ... :shock:

WD

 

[marin man]

Suppose so....good job we never ride our bikes then wd.......

 

[WD Pro]

I don't really like editing posts so as an addition to the above - what bolt material do pauls cantis / v's use ? Could be a good guide i.e. The mainline manufactures are run by accountants but a niche / boutique manufacturer like Paul probably would fit one if they could, knowing the type of customer they have would be prepared to pay for the nice touches 'out of the box' rather than upgrading later

WD