Any recommendations for a bolt upgrade that uses a large Allen key size?
Whats wrong with the current size, should avoid over tightening (owner of that stem, fly a lot an have to remove the bars a lot still on the existing bolts)
The bolt heads are designed that small on a Thomson X4 to prevent over-tightening which might compromise the strength of the stem.
I've thought about it too haviong both undertightened & also snapped one due to overtightening... the 3mm ones that came with my last X2 are worse, an allen key almost snaps before you get anywhere near tight enough, got a shot of a mate's torque wrench that uses bits instead & it's never moved since. Unless you really want new bolts i'd get hold of a torque wrench & do it that way as the flex in a small allen key makes it feel like you're overtightening.
If you do really want new shiny bolts, these'll do [url= https://www.uberbikecomponents.com/category/363/Titanium-Stem-Bolt-Kits ]shiny[/url]
an allen key almost snaps before you get anywhere near tight enough, got a shot of a mate's torque wrench that uses bits instead & it's never moved since.
Sounds like a cheap crap Allen key?
Well, maybe near snappage was a slight exaggeration but the park one I have flexes enough below 5nm that it's pretty difficult to gauge how tight the bolt is - when I tried a mini torque wrench with a 3mm bit I was surprised how much tighter it should have been, and explained why my bars used to creep forward over a few days commuting leaving me stem-gazing Alla Froome 😆