Hi,

Purchased a 70mm Thomson stem this week and it came with 3mm, rounded bolts? Every other Thomson I’ve ever bought over the years has been square bolts that take a 4mm allen key.

Anyone else? or just me?

Thanks,

Mark

Yes, middle of last year:

http://bikethomson.com/2011/06/30/changing-stem-bolts/

Interesting reasoning on their site there.

Excellent. Good find. Was a little worried mine wasn’t kosha 🙂
Thanks
Mark

No checked the link but wasn’t it to stop ham fisted over tightening?

From their site:

A few reasons:
1. We think they look nicer.
2. Serrations have been removed to lessen corrosion.
3. Most importantly, the Allen socket has been dropped from 4 to 3mm. This will act as a torque limiter as in most cases you cannot get the bolts tighter than 55 inch pounds. The 4mm socket bolts could get as high as 150 inch pounds. This should help riders without torque This should help riders without torque wrenches avoid damage to stem, bar and steerer.

This will act as a torque limiter as in most cases you cannot get the bolts tighter than 55 inch pounds.

Which will be fine until one seizes and you cannot get enough torque on it to undo it

Treble Coppaslip all round please 🙂

Treble Coppaslip all round please

Good shout! They do look fragile compared to the old ones.