Disc rotors - is it ok to use aluminium bolts?

[jonboy]

What are people views on using aluminium bolts on disc rotors? It's a Sram/Avid set up with 180/160mm rotors.

For context, this is for a kids bike (a 10yr old) not on a full on DH bike.

Your opinions and advice appreciated

 

[mdvineng]

Use steel or Ti if you are weight worried. never use Alloy bolts for high stress items.

 

[madjh]

No, it is no Ok. Use Ti bolts but never aluminium in stressed points.

 

[mattr]

You'd be better off with 3 steel or Ti than 6 aluminium.

 

[hamster]

The force is multiplied 3-4x compared to the brake calliper force - or something like 20x of the force from the tyre.
Do not do it.

 

[dyna-ti]

Its down to shear forces as those are the forces acting on the bolt as the rotor pulls against them.
Ti and steel are more than 4x the shear strength of alloy, which is quite soft really when you think about it.

 

[Supratada]

I wanted little red bolts for the discs on me San An so was being tempted by all the anodised alu ones. However, I knew Alu brake disc bolts was a bad idea, but did find some red steel ones.
Which was nice.

Also, when I was 10-ish, I was riding quite hard and fast on road. I was probably only 12 when I start breaking rear spokes (at the bend, non-countersunk cheap hubs) through pedalling effort uphill. Don't underestimate the power of a 10-year old.
Also, much like running out of bog roll or printer ink, brakes and brake parts never ever fail until you really need them.