Wow that is light, what’s the spec?
My 16yo specced and built it with my support last year as he couldn't race due to cancellations. I gave him a £600 budget without wheels and he spent £900 overall:
- PlanetX Nanolight 54cm frame,
- Dura-Ace 9000 RH and 9070 Di2 LH shifters - the LH acts as a brake only,
- Dura-Ace 9000 rear derailleur with titanium jockey wheels, SRAM Red 11-28 11 speed cassette, KMC X11SL chain,
- Aerozine bottom bracket, Rotor crank with single carbon chainring (he can run 36-44 chainrings) and Dura-Ace 9000 pedals,
- 1100g carbon tubular 50mm wheels and Vittoria Evo CS front plus Continental Pro-LTD rear tyres and Aerozine titanium skewers,
- Specialized Ruby bars, Chinese seatpost, Chinese 80g saddle, Relic stem, Aerozine seatpost clamp,
- PlanetX Nanolight brakes with lightweight pads and pad holders, Clarks lightweight cable outer gear/brake cables with lightweight inners,
- Tape strips rather than handlebar tape, Lightweight bottle cage, RSP front chain catcher which has been drilled.
Last year it was 5.5kg with a Dura-Ace 9000 cassette and it's been swapped to a SRAM Red one to save 60g. We've also cured the habit it had of wheelie-ing off the line on a hillclimb. The brake hoods are coming off as well for heat-shrink plastic, which will save a further 30g. We
could sand the lacquer and decals off, which would save about 150g, but that leaves unprotected carbon or a thin lacquer coat needed - he decided against it.
The downside? It's got a
really low rider weight limit - at our guess it's 60kg. But he's 53 kg so we're fine.
The aim is to replace it with a Ridley Helium SL frame as Ridley are his team sponsor, but that'll depend on finding one in XS/S at a very low price.