Which Groupset?

I still think that the 7800 DA with the exposed gear cable is the crispest rear shift, and remains so over time. The hidden cable run is a step back IMHO. 7800 gives the second most idiot-proof shifting (taking into account the 2 paddle system AND shift performance) under pressure (not relevant here I know- few of us ride a road bike in anger). Most idiot proof under pressure would be the Di2 I think. My 2p.

Old post, but you are the first person I've come across who agrees with me on this. The exposed shifter cable design is far superior in lightness/crispness of shifting. I regularly service older Tiagra 9-speed rental bikes and every time I dial the shifting in I think, why did Shimano ever abandon this design?

The tight turn the shift cable has to make in the 'new' design shifters accounts for a lot of extra friction/ loss of crispness. Also changing cables has become much more of a pita, not because the shift cables are under the tape, but because threading an inner wire through the shifter was meant to be done by Japanese midgets only.

DI2 shifting is super crisp and precise but there is still a fair weight penalty on that system compared to their cable setup. I guess it depends if you think the lag in shift from cables is holding you back? With me its just my legs!

The new red will likely be lighter than DA and record and still be pro level shifting. My guess is its only a matter of time before the UCI's 6.8 limit is revised as its original mandate of preserving safety is slightly obsolete as the tech has developed to make even large framed builds sail under safely. Groupset weight at the moment is less critical so folk don't mind the extra servo weight, but it could all change...

It's very, very unlikely the UCI will do anything as sensible as reduce the minimum weight

hasn't it been static for over a decade? Its pretty achievable on the top 3 frames in most manufacturers lineups these days with minimal effort and without the need for hypermachined WW parts... lose that and the groupset race gets interesting.

As if the UCI care

The pressure will mount surely... funding comes from sponsorship and its already a bit silly seeing the top flight frames with lead bungs in the bb spindles to bulk up. seems like it may be in the pipeline as they are moving towards approved safety testing

http://road.cc/content/news/38079-uci-may-scrap-68kg-weight-limit-race-bikes

Functionality > Durability > Looks > Weight > lfgss opinions
:)

Still want Di2 on the TT bike just to lose some cables.. Want, it's NEED damn it!!!

Old post, but you are the first person I've come across who agrees with me on this.

Huh? Lots of people agree with it. Exposed cables are better. 7800 shifting is better.

there is still a fair weight penalty on that system compared to their cable setup.

50g? If you're that concerned about weight you'd already be at the 6.8kg limit and be gluing spanners to your bikes.

hasn't it been static for over a decade? Its pretty achievable on the top 3 frames in most manufacturers lineups these days with minimal effort and without the need for hypermachined WW parts... lose that and the groupset race gets interesting.

I remember looking at the pro Wilier bikes. With integrated BB, intergrated seatpost, intergrated headset etc. But still just over 1Kg. The team just add a SR groupset, saddle, stem+bars, pedals, and wheels. Considering you'd want the lightest wheels possible. If it wasnt for the weight of the mechanical doping. They'd all be breaking the regs.

And go round corners and not fall off.

Di2 will not help you here. Madskillz might but you need to get them - I hear there's some bloke in Clerkenwell who will sell them to you but the price is very steep.

Cancellara should drop in and see him after gifitng a silver medal to Wiggo

Cancellara should drop in and see him after gifitng a silver medal to Wiggo

A lighter groupset, would have allowed for more powerful mechanical doping.

trufacts.

That is true.

[/spartacus doesn't cheat]

That is true.

[/as much as Tony Martin]

50g? If you're that concerned about weight you'd already be at the 6.8kg limit and be gluing spanners to your bikes.

better to be under it... help get my pies to the top of the hills.

http://www.totalcycling.com/index.php/component-weights.html

Shimanos 50g is a bit optimistic... this is good for comparison.

Still only talking 250 grams.

"Short version- It works. Recommendation: Sell everything you own to make it happen. (I sold framesets, a Super Record 11sp grouppo, a Chorus 11 mini grouppo, multiple Campagnolo wheels and cassettes to make it happen on 2 bikes for me. That’s saying something for a lifelong Campaphile.)"

http://weightweenies.starbike.com/forum/viewtopic.php?f=3&t=70101

"The Di2 system requires a battery and electrical cables which cannot be cut shorter."

That total cycling link also measures the medium and claims the cables can't be cut whereas the bloke I linked to has customised his setup by cutting cables AND internally mounting the battery.

Would Di2 cope with immersion in French canal water?

Would Campy?

I read that DI2 was tested under 30ft of water.

Would Di2 cope with immersion in French canal water?

You buy me the groupset, I'll test it for you.

I read that DI2 was tested under 3000ft of water.

I read that Di2 was tested under the pacific ocean

it was on mtbr i read the comment

http://www.bicyclestore.fr/10000614-3295-thickbox/cinelli-mash-golden-leaf-bicycle-store-customs.jpg

though he could well be talking shite