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PostPosted: Thu Mar 14, 2013 8:42 pm 
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Joined: Tue Nov 11, 2003 9:47 pm
Posts: 1804
Location: Santa Cruz, California, USA
I wonder if Sony will be suing for trademark infrigement? RCA is a popular trademark.

I like it, but raw carbon and relatively skinny tubes just look good to me. If it was merely expensive rather than insanely expensive I'd get one.


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PostPosted: Thu Mar 14, 2013 9:52 pm 
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Location: Santa Cruz, California, USA
It's only 13mm higher than the R3SL head tube. I could still fit that without going to a -17 stem. But I have long legs for my height so my seat's relatively high for the frame size. On my R3SL I have a +6 degree stem and 5mm of spacer. On the Rca I'd need the stem flipped down and 7mm of spacer.
(that's not adjusting for headset stack height)

But for someone the opposite of me with short legs for their height it may not go low enough.


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Posted: Thu Mar 14, 2013 9:52 pm 


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PostPosted: Thu Mar 14, 2013 10:02 pm 
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Posts: 2013
Location: San Francisco Peninsula
Damn, my Cento1SR is -26mm of stack for a similar reach. Using a -6, 130mm stem right now.

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PostPosted: Thu Mar 14, 2013 10:06 pm 
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Joined: Tue Nov 24, 2009 10:26 pm
Posts: 163
Looks like a nice bike, but I'm not sure why anyone would pay 10k for this frame when you can get a lighter EVO frame for less than half the price. I paid less than the cost of this frame for a full bike di2 9070 evo.


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PostPosted: Thu Mar 14, 2013 10:42 pm 
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Location: Austin, TX
asv wrote:
Looks like a nice bike, but I'm not sure why anyone would pay 10k for this frame when you can get a lighter EVO frame for less than half the price. I paid less than the cost of this frame for a full bike di2 9070 evo.


Lighter EVO frame?

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PostPosted: Thu Mar 14, 2013 10:50 pm 
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rmerka wrote:
Lighter EVO frame?


Evo Nano.


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PostPosted: Thu Mar 14, 2013 11:08 pm 
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Posts: 1976
Location: NoVA/DC
Djconnel,
the r5ca had a 72degree seat tube angle. None of their seat tubes truly bisect the bb on any of their bikes, although I haven't stared at the latest ones to doublecheck. Either way, that wasn't a design feature of the r5ca. The slacker seat tube was purely to better accommodate a lighter, inline seat post.

As far as the cable entry points, I'm glad they decided to NOT enter the cables at the head tube. Doing so is easy and light, but not convenient. especially for all you guys that like to slamthatstem. Leads to tighter radius bends, kinked housings at the entry point. I also like that the rear derailleur cable exit point is not on the very back of the dropout but in front of the axle. Again, it gives more room for gentle bends.
Bikerumor has some pics that show the min/max/median weights of the frames for each size. Also, their weight is supposed to include Der hanger, cable guide, frame stops, etc. Basically all the dedicated, required parts.
not being able to take a seatpost battery kinda blows, though.


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PostPosted: Fri Mar 15, 2013 2:03 am 
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Joined: Mon Apr 03, 2006 8:53 am
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thisisatest,

The user guide/manual says that it can take a seat battery.... it on the cervelo web site
C


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PostPosted: Fri Mar 15, 2013 8:30 am 
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Joined: Fri Apr 04, 2008 2:49 am
Posts: 1276
Location: Europe
I was looking into this one and I'm officially impressed! The Cervélo RCA definitely upped the ante over every other production frame. Apart from the BB standard, it's probably the most awesome frames at the moment. It's light with an aerodynamical advantage and probably rides like a dream. The RCA white paper shows a photo on a scale on page 18. Man is 667g LIGHT!!

Also, there are some interesting (seemingly unlisted) videos on their channel:
http://www.youtube.com/watch?v=04vdDyhkBLE
http://www.youtube.com/watch?v=iIlNlEWLIWY
http://www.youtube.com/watch?v=gzI5Vj2arcA
http://www.youtube.com/watch?v=rEjVjDefRkk

One caveat about the RCA: it's BBright. It seems we can't have it all after all. Any weight savings made with the frame is paid back in crankset weight due to the limited selection of compatible cranks, although the THM Clavicula is available with BBright solution, but it won't be the lightest. For a truly light build, I would've liked to have seen it BB30 with a Hollowgram SiSL2 SpiderRing option. Maybe a THM M3 with custom spider-less integrated chainring combo instead? If you go with a frame this light, you might as well go with the lightest components, especially since it isn't about the money anymore.

I wonder if a custom Crumpton could be the lighter now that he has a new tubeset.

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Last edited by mythical on Fri Mar 15, 2013 8:31 am, edited 1 time in total.

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PostPosted: Fri Mar 15, 2013 8:31 am 
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Joined: Thu Jan 03, 2008 6:14 am
Posts: 1229
Location: by Crystal Springs (Sawyer Creek Trail)
thisisatest wrote:
Djconnel,
the r5ca had a 72degree seat tube angle. None of their seat tubes truly bisect the bb on any of their bikes, although I haven't stared at the latest ones to doublecheck. Either way, that wasn't a design feature of the r5ca. The slacker seat tube was purely to better accommodate a lighter, inline seat post.

As far as the cable entry points, I'm glad they decided to NOT enter the cables at the head tube. Doing so is easy and light, but not convenient. especially for all you guys that like to slamthatstem. Leads to tighter radius bends, kinked housings at the entry point. I also like that the rear derailleur cable exit point is not on the very back of the dropout but in front of the axle. Again, it gives more room for gentle bends.
Bikerumor has some pics that show the min/max/median weights of the frames for each size. Also, their weight is supposed to include Der hanger, cable guide, frame stops, etc. Basically all the dedicated, required parts.
not being able to take a seatpost battery kinda blows, though.


I haven't seen a Cannondale Evo in the real world at the weights that Cannondale advertised. On top of that the Cervelo gets that weight with Kamm aero tubing. Very impressive (especially if you also consider that on top of that, their claimed weight is with hardware [seatpost clamp, front and rear derailleur hangers, water bottle screws, grommets for Di2?] and an integrated magnet)


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PostPosted: Fri Mar 15, 2013 9:45 am 
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Joined: Fri Jan 18, 2013 12:37 am
Posts: 84
uraqt wrote:
thisisatest,

The user guide/manual says that it can take a seat battery.... it on the cervelo web site
C


About time they sorted out their Di2 story on the R series. I found a great deal on a R5 VWD but decided not to do it because of the problems with doing internal Di2.


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PostPosted: Fri Mar 15, 2013 10:58 am 
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Joined: Mon Jun 23, 2008 8:52 am
Posts: 604
Interesting is that 667grams includes paint (30grams) and hardware (43grams). Bare frame in size 54 is 594grams.
CRAZY! :thumbup:


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PostPosted: Fri Mar 15, 2013 1:05 pm 
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Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7371
Location: San Francisco, CA
thisisatest wrote:
Djconnel,
the r5ca had a 72degree seat tube angle. None of their seat tubes truly bisect the bb on any of their bikes, although I haven't stared at the latest ones to doublecheck. Either way, that wasn't a design feature of the r5ca. The slacker seat tube was purely to better accommodate a lighter, inline seat post.


A slacker seat tube + forward tube displacement puts the seat in a similar place at one particular seat height. Lower, further forward. Higher, further back.

Image

This one intercepts the center of the BB, but is steeper:
Image

Granted, the high BB requires more head tube relative to a lower BB, but that head tube is huge. Reminds me of:

Image

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PostPosted: Fri Mar 15, 2013 1:17 pm 
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Joined: Mon Sep 07, 2009 3:10 am
Posts: 372
Just so that we are all on the same page. It looks like they changed the seatpost angle to 73 degrees, the original R5ca was 72 degrees. But this has nothing to do with stack or reach. This change should not change your fit at all. All that it will change is possibly what seatpost you use and where on the seatpost rails you place your saddle. Your saddle should be in the identical position, saddle position is not determined by seat tube angle.


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PostPosted: Fri Mar 15, 2013 2:38 pm 
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Joined: Wed Jan 10, 2007 10:56 pm
Posts: 664
Location: Canada
The best part of the white paper is the bar chart that shows the actual weight of the Pinarello................oink, oink!


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Posted: Fri Mar 15, 2013 2:38 pm 


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