Scott Spark shock bolts

Tank-slapper

The bolt holding the rear of my shock snapped recently, probably as a result of some play in the linkage (see other recent post). I am planning to replace it with titanium.

The stock bolt that snapped was a 12.9 grade steel M6 x 35mm with 25mm of thread. It snapped right in the middle, where it passes through the eye of the shock. Because it is threaded in this section, the bolt is only 4.5mm thick instead of the 6mm it would be if it wasn't threaded.

So, the plan is to replace it with a bolt that only has 10mm of thread. After much internet searching, the only practical way of doing this is to cut down an M6 x 50mm bolt. I have 2 on order from Tastynuts and will report back if it works, or if I die on the first bump.

nicklouse

dont bother.

Ti is not as strong as steel.

and 12.9 grade bolts are strong.

Tank-slapper

Yes.

I would prefer to cut down a 12.9 grade steel bolt, but that would leave an end open to corrosion. Titanium is roughly, nearly, about as strong as 10.9 steel, which isn't too bad. With the bolts being fully 6mm thick through the eye of the shock as well, I am hoping it will be strong enough. It will be much better than stainless anyway, which is like butter.

nicklouse

to quote a supplier of Ti bolts

X titanium bolts are no substitute for bolts above 8.8 strength - recognizable through stampings of “10.9” or “12.9” on the screw head. If in doubt you have to assume that titanium bolts are NOT suited for the application to ensure your own safety.

I would put up with a little corrosion.

Tank-slapper

Yes, I read that. It is off the Tibolts site isn't it?

The bolts are on order now, so I will give it a go anyway and report back. I have ordered some 12.9 steel bolts for backup.