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Slowtwitch Forums: Triathlon Forum:
Official Speed Concept Owners Thread

 

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Carl

Aug 3, 14 19:16

Post #7026 of 7038 (694 views)
Re: Official Speed Concept Owners Thread [bobknox] [In reply to] Quote | Reply

It varies...a lot. We do our own BB bearing testing to assist the product managers in OE spec decisions, and ceramics have been included in those efforts, but those results and how we rank them (cost vs life, etc) aren't necessarily applicable to an aftermarket-oriented question like I'm guessing yours is. More to the point, within "ceramic" bearings there's a lot of variation to begin with and we certainly haven't tested everything that's available on the market...so it's hard to give a definitive answer.

This article (and the ceramics portion in particular) is a great introduction to the topic. The frictionfacts guys don't go after the lifetime question, but their BB bearing results are still useful for those who want to come up with their own (short term?) value calculations. (yes, you have to pay to get the brand names associated with the results)


Carl Matson
Trek Bicycles
Design Engineer - Speed


bobknox

Aug 4, 14 4:28

Post #7027 of 7038 (680 views)
Re: Official Speed Concept Owners Thread [Carl] [In reply to] Quote | Reply

Thanks Carl,

The ceramic bearing bottom bracket was an option on the SC 9 series P1 order. I don't remember the exact cost but $150 sounds familiar. I had assumed that it was a shimano part but maybe it is after market and installed by Trek. Would you know what ceramic part is being used?

Regards,

Bob Knox


Carl

Aug 4, 14 4:56

Post #7028 of 7038 (671 views)
Re: Official Speed Concept Owners Thread [bobknox] [In reply to] Quote | Reply

Off the top of my head, no. I think they're made by Enduro, but which of their many offerings I don't know. You or the shop could always look for identifying info on the bearing seals when the bike arrives and try to track down any additional info that way.


Carl Matson
Trek Bicycles
Design Engineer - Speed


meerkite

Aug 5, 14 6:51

Post #7029 of 7038 (607 views)
Re: Official Speed Concept Owners Thread [Carl] [In reply to] Quote | Reply

Hi Carl,
I have a 2014 Trek SC 7.5, I am wishing to upgrade it to shimano Di2, Do you have parts lists or is it possible?

Any information appreciated.


Carl

Aug 5, 14 6:55

Post #7030 of 7038 (603 views)
Re: Official Speed Concept Owners Thread [meerkite] [In reply to] Quote | Reply

here's a thread on the subject


Carl Matson
Trek Bicycles
Design Engineer - Speed

(This post was edited by Carl on Aug 5, 14 6:55)


Jorge M

Aug 5, 14 12:21

Post #7031 of 7038 (574 views)
Re: Official Speed Concept Owners Thread [Carl] [In reply to] Quote | Reply

I fixed this. Thanks for the advice!

Jorge Martinez
Head Coach - Sports Science
E3 Training Solutions, LLC
@CoachJorgeM


nebeachbum

Aug 9, 14 11:12

Post #7032 of 7038 (459 views)
Re: Official Speed Concept Owners Thread [Zev] [In reply to] Quote | Reply

is
Zev wrote:
Had to share with the family as it just arrived tonight:[/q
uote]

Is that "lime green"?!!! Looks way better then the paint chips they have at LBS. Anyone know.
_________________
if it looks fast it is fast


Zev

Aug 9, 14 11:45

Post #7033 of 7038 (449 views)
Re: Official Speed Concept Owners Thread [nebeachbum] [In reply to] Quote | Reply

Yup, it is.

"No matter how hard you train, Somebody will train harder. No matter how hard you run, Somebody will run harder. No matter how hard you want it, Somebody will want it more, I am Somebody"~ST Post


Nords

Aug 18, 14 8:50

Post #7034 of 7038 (264 views)
Re: Official Speed Concept Owners Thread [Mr.Bump] [In reply to] Quote | Reply

Hi Carl,

Firstly, apologies if this has come up before, but I've spent the last few days trying to search the forum with no luck - and I'm not sure if that's because I don't know how to search correctly or if the topic hasn't been covered before.

I have recently purchased a second hand 2011 SC 9. I am extremely happy with my choice and already setting some new segment PB's! However, the current groupset on the bike has a mismatch of 10 speed parts with a Dura Ace 7800 chainset. In order to be able to chop and change wheels between my road bike and my SC, I thought I would change the groupset to Ultegra 6800 11 speed (mechanical), but in doing so, I have the following questions:
  1. Do I need to replace the chainset when moving from a 10 speed to 11 speed? I have spoken to two LBS's on this and the one said that you could probably get away with using a 10speed chainset and an 11speed chain. What are your thoughts on this? (ignoring the fact that I will end up with a mismatched groupset if I do this).
  2. On a similar topic, would I need a specific 11spd front derailleur or would the Dura Ace 7800 work with 11spd?
  3. Lastly, assuming that I do purchase the new chainset, do I need to purchase a new bottom bracket component or will the 11spd fit into the existing component on the bike?

Depending on your answers, my shopping list is thus:
  • Ultegra 6800 11 spd chainset (tbc)
  • Ultegra 6800 11spd braze on front derailleur (tbc)
  • Ultegra 6800 11spd rear derailler
  • Dura Ace 9000 11 spd bar end shifters
  • Ultegra 6800 11spd chain

Ignoring the cassette which I already have.

Many thanks for your thoughts on this!

Regards,
Ian


Carl

Aug 18, 14 11:01

Post #7035 of 7038 (235 views)
Re: Official Speed Concept Owners Thread [Nords] [In reply to] Quote | Reply

You'd probably be better off going to your LBS or Shimano for the answers...seriously...but here goes:

-cranks are pretty insensitive to the switch
-FD cable pull ratio changed when they went to 11spd, so you probably need to match the product "age" to ensure compatibility...i.e. a 5800, 6800, or 9000 FD with your 9000 shifters...I did try matching up a 9000 FD with my older 10spd DA TT shifters and it's not a happy combo.
-they didn't change their Hollowtech2 BB design with the 11spd cranks so yes you'd be able to drop an 11spd Shimano crankset right in if you bought one


Carl Matson
Trek Bicycles
Design Engineer - Speed


Nords

Aug 18, 14 11:43

Post #7036 of 7038 (219 views)
Re: Official Speed Concept Owners Thread [Carl] [In reply to] Quote | Reply

Responses very much appreciated - thanks Carl.


Neoryan7

Aug 21, 14 8:47

Post #7037 of 7038 (73 views)
Re: Official Speed Concept Owners Thread [Carl] [In reply to] Quote | Reply

Hi, I am reassembling the Speed Concept with Di2 components. I noticed there is a pink plastic tube "noodle" attached to the rear brake guide. How important is this piece? Mine is split and frayed. Could I substitute it with shimano's bc-9000 brake ferrule?

http://www.cyclistno1.co.uk/...Cabling/P1010707.JPG

Or could this be left out? Thanks


Carl

Aug 21, 14 9:06

Post #7038 of 7038 (65 views)
Re: Official Speed Concept Owners Thread [Neoryan7] [In reply to] Quote | Reply

it's not critical, but it does improve the feel of the rear brake. if the bc-9000 fits in there you could certainly use it instead.


Carl Matson
Trek Bicycles
Design Engineer - Speed

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Ironman run shoe weight
When you race an Ironman, what weight class do you think is most appropriate for you? A sub-6-ounce shoe is a pure racing flat. A 7.5 - 8oz shoe would be a Saucony Kinvara or Hoka Clifton. A 10-11oz shoe is a lightweight trainer.
5.5-6.0oz
7.5-8.0oz
9.5-11.0oz
12oz+
I never thought about it
I don't do 140.6
I'm boycotting this poll