[samh]

I have a threaded Cinelli Grammo stem. Do I tighten to same or less torque as a non-titanium bolt for the expander bolt?

 

[Kerry Irons]

Same

I have a threaded Cinelli Grammo stem. Do I tighten to same or less torque as a non-titanium bolt for the expander bolt?

If the only difference is the bolt, then it's the same torque. If the bolt is a different size or the stem is a different design, then all bets are off and you need to get the manufacturer's recommendation.

 

[Eric_H]

Bolt is aluminum

I have a threaded Cinelli Grammo stem. Do I tighten to same or less torque as a non-titanium bolt for the expander bolt?

I had a couple of Cinelli Grammo Ti stems "back in the day". I am pretty sure the expander wedge bolt is Zicral alloy (aluminum). I just torqued it down like any other expander bolt, which for me means without a torque wrench. I just used my trusty Bondhus 6mm allen wrench, that has a handle of ~ 15 cm.

A Grammo-related tip: be sure to use a lot of grease/anti-seize on the handlebar clamp bolt with this stem. The bolt tends to gall in the Ti threads and Ti collar that houses it. This will give you a false sense of tightness and then the bars will slip.

If the stem is new to you, be aware that there were 26.4 and 26.0 bar clamp versions out there. The clamp diameter should be stamped on the quill.

 

[Mark McM]

Aluminum and anti-seize

If the only difference is the bolt, then it's the same torque. If the bolt is a different size or the stem is a different design, then all bets are off and you need to get the manufacturer's recommendation.

Like Kerry says, it is the same application, so it is the same torque. But keep in mind that properly lubrication/anti-seize is even more important with aluminum fasteners than with other metals. Unlubricated aluminim is prone to galling, so slather a lot of anti-seize on all the contact points before torquing it up.