Sparky
Joined: 08 Dec 2003
Posts: 19083
Location: PDX4/25/17 11:20 AM |
No, but not crazy heavy on the high end either. I mean if you can get a 10-11lb Emonda, a 13lb Disc bike is doable with the right coin. And if you are not Clyde, or in fact especially light yourself, wheels can be light enough as to close the gaps in weight considerably IMO.
But especially with the road disc frames taking on thru axle designs leaning heavier...
And the stays in the frame need to be more stout for the forces of hub brake, thus frames tend to be beefier as it should be.
More material for the caliper mounts, usually in the form of longer aluminum dropout parts etc. Post mounts save on adapters weight at the calipers, extra weight in the form of bolts and adapters eliminated.
Hubs weigh more, disc weight, low spoke wheel not practical generally, thus more spokes weigh more, etc. King ISO hubs are pretty competitive in the weight dept, as are other high end big bucks stuff.
Super light carbon rim with no added brake track material needed, and that is rotational as well some respite?
But with carbon frames being so light at the higher end, and the parts getting lighter and lighter, a smaller gap for overall weight toward the high end. With King figure hub set weight 1/4 or more heavier than non disc example. Shimano hub weight gaps bigger I think.
Example Shimano: Calipers are 98g, finned IceTech brake pads are 20g and a 160mm Centerlock rotor is 116g.
I'd say on the STI, approx 100 grams more at the high end??
The Spyre carbon cable actuated are under 300gr VS 6800 Calipers in the 330gr.
Non hydr lighter STIs with the cable actuated and the math there is evident. Those work great too IMO.
I digress...
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