Crux is quiet heavy frame, even s-works so not best example
. Are lighter frames.
Canti over disc saves 400-500g. For lighter guys a lot, for heavier not so significant.
Question is will "light" canti fork chatter ? Yes, it will. Cannondale never figured out how to make non chattering fork for cross... Other brands did, even without support hanger ( vide Specialized, Trek ).
From my experience, lightest RELIABLE cross bike which can take anything seen at race , under 80-90kg rider has to be at minimum around 7.5kg in 1x11, 7.7-7.8kg for 2x11 . Below that you play in very dangerous game.
Pro's setups ( money is not a concern ) are around that weight / demanded reliability level : 2-3km minimum ( from pit to pit )... I mean canti frames, disc braked are naturally heavier. That's why you (usually ) won't see GCN guys weighting disc bikes, canti only ( and even here are scams / WvA Colnago @ 6.8kg without showing scale.... good joke
Places which would be last on my "going light" list : skewers, amount of spokes in wheel, seatpost+clamp, stem+bar .
BTW I'd like to see specs of Marin 7 kg bike build on 1500g frame and zero weenie parts (naturally with pictures
) or it didn't happened. I know it didn't, but just checking
1100g frame, 450g fork, 1480g wheelset, Sram Red 22 + TRP Spyre SL, rest reasonably light ( even if alu parts -> weight close to light carbon ) will set weight around 8-8.5kg+ in "ready to ride" mode : pedals, 1 bottle cage, garmin sensors etc .
if memory serves well Felt 1X on DA Di2, rest really light , size M was 8.9kg on scale with pedals.
Can you build 6.8kg bike : yes. will it be reliable ? No. Not for you. For pro guy ? ...perhaps, however their bikes weight shows, that they want to add some weight to gain some strength/ reliability.
Go to Heaven for the climate, Hell for the company.Mark Twain
I can be wrong, and have plenty of examples for that