As an Amazon Associate I earn from qualifying purchases @AMAZON
Shimano PRO Vibe 7S OS Alloy Road Bicycle Stem
The Shimano PRO Vibe 7S OS Alloy Road Bicycle Stem is very strong and stifff.
At 137 grams for the 120mm length (as weighed), it offered the stiffness I wanted for my LOOK 595 Ultra road racing bike and the Shimano PRO Vibe carbon handlebar. Really an excellent combination— plenty stiff due to its two-bolt design that wraps around the bar
At about $99 @AMAZON, it won’t break the bank.
Shimano also has a carbon version, but it’s significantly more expensive, and the weight is little different.
See also the Shimano PRO Vibe Sprint 'Mark Cavendish' stem.
The 137 grams is actual weight on my lab scale, for the 120mm stem.