Stem Torx Bolts - Size?

[Heisenberg71]

I hate Torx bolts! Over time the small and fiddly stem bolts (Zipp) are rounding and I want to replace with new ones before they let me down. Does anyone know what size bolts I need to buy, M5/M6 etc plus length? I assume they are pretty standard but I can't find the answer anywhere.

Any help greatly appreciated.

Looks like these:

 

[S-Express]

The easiest, most accurate (and most obvious) way would be to take one of the existing bolts out and measure it - is there any reason why you can't do that?

They will be either m5 or m6, probably around 15-18mm length. 10 seconds with a ruler will confirm which.

 

[Heisenberg71]

The easiest, most accurate (and most obvious) way would be to take one of the existing bolts out and measure it - is there any reason why you can't do that?

They will be either m5 or m6, probably around 15-18mm length. 10 seconds with a ruler will confirm which.

Yes, I am just unsure whether the length is just the threaded shaft? I also don't have anything accurate enough to measure diameter to +/- 1mm. Just wondered if anyone had prior knowledge to help me get it right first time.

 

[S-Express]

Yes, I am just unsure whether the length is just the threaded shaft?

It is.

I also don't have anything accurate enough to measure diameter to +/- 1mm.

A tape measure or a ruler is all you need. Surely you have one or the other? According to Zipp's own web site, the bolts are M5, so that's one question answered - now you just need to get the length.

 

[Heisenberg71]

Thanks for the clarity, appreciate the help.

 

[Pale Rider]

If you can't get on with Torx, there's nothing to stop you replacing with allen head bolts of the same length.

 

[Heisenberg71]

If you can't get on with Torx, there's nothing to stop you replacing with allen head bolts of the same length.

Great minds.....ordered just that tonight

 

[Heisenberg71]

Fitted Allen bolts. Super sorted!
No more Torx, YAY!