"26.8lbs that my heckler weighs in at is pretty damn good considering – brakes, forks, wheels"
Is it though? Heckler frames aren't light? You could have something like an ibis Mojo with Lopes Link and it'd be lighter and be similar (eg same HA)?
Air/Coil U-turn Pikes are heavy. 2.2(ish)-2.4+kg. RS RVL Air U-turn (20mm) are 1750g. Magura Thor (20mm) are a touch less. I think manitou minutes (20mm axle also) are less again?
M4s? Could you not 'make do' with Marta SLs, perhaps with ventidiscs?
I can't remember but I thought XT wheels weren't super light?
Some good suggestions buddy – but as I said I am happy with the weight vs. capability of the bike for what I use it for….I still like the bigger stuff and can be seen taking this one down Les Gets/ Morzine without issue, i.e. brakes over heating or the bike being rattled apart – I suppose it is simply a question of whether the rider is happy with the weight of the bike, its capability and its intended use – which I am.
Some of the parts that you mentioned don't really give me that much gain when I take certain things into consideration, i.e. spring weights….if I run RS Rev's I only lose 18g (I'm a heavy old man!) and the weight with correct spring for me is 2095g for the Rev's and the pikes are 2113g.
With the wheels it is completely subjective, but I have to again go for something a bit more sturdy due to my weight and discipline (AM) – yeah I could save some weight here, but will they stand up to the hammering I put them through? (experience in the past says no – split rims & flat spots).
As for the brakes Marta SL's come in at about 330g with 183mm rotors & the tech M4's come in at 410g with floating rotors (I have matchmaker clamps too, thus cutting weight from shifter mounts) – so the saving is 80g, but how much do the shifter clamps weight? But I know which I would prefer in terms of both performance and replacement parts.
I totally agree with the IBIS Mojo and I did look at them….but unfortunately I am not a millionaire!! 😯 and the price is somewhat restrictive!! 🙁