Just heavy, nothing more. I had some when I built my first bike.. and I
soon regretted the purchase.
With "normal" tubes you can easily save ~500 grams of rotating
weight what is a lot more effective than e.g. getting a frame that weighs
1kg less.
The chain tensioner looks pretty btw.
I am just getting some new parts for my city bike at the moment.. cranks,
rear wheel, cassette etc
I don't understand why people bitch about small weight increases,
I sure won't feel a differnce if my bike weights 13kg or
13.5kg.
The chain tensioner is supposed to work good with quick release, well
see :).
Oh yeah and I'm going to buy a new brake cable, so I can do
x-ups, barspins and tailwhips.. Well at least I could do those tricks
but it's for x-up mainly.