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Old September 20th 19, 08:56 PM posted to rec.bicycles.tech
Tom Kunich[_5_]
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Default Article about SRAM in Forbes

On Thursday, September 19, 2019 at 7:58:25 PM UTC-7, Frank Krygowski wrote:
On 9/19/2019 5:32 PM, Tom Kunich wrote:
On Wednesday, September 18, 2019 at 8:15:22 PM UTC-7, Frank Krygowski wrote:
On 9/18/2019 3:58 PM, Tom Kunich wrote:
On Tuesday, September 17, 2019 at 2:35:03 PM UTC-7, AMuzi wrote:
On 9/17/2019 2:21 PM, wrote:


OK. As long as you know you are doing the change for completely aesthetic reasons. For performance, there ain't no difference. I have Record, Chorus, Centaur, Veloce, and a Mirage part or two on 9 and 10 speed bikes. No difference in performance.


+1


Record and Chorus are MILES ahead of the rest of the line in performance. The throw is less and the motions of the components are such that you don't have to mess about nearly do much to stop noises.

I absolutely would have kept Centaur or below if there weren't these differences because the price difference is so substantial. Even the Record cassettes shift cleaner. The Record cable set and the chains are better.

Though I am presently testing one of those Connex super-chains and so far it seems to be the best I've used. No noises and shifts great after 400+ miles. I think that you're the one that recommended that and if so you're seem to be 100% correct.

OK: Since I have worked on only a few Campy components and owned even
fewer, can someone detail the mechanical and/or material differences
between the different levels of Campy equipment? To keep it simple,
let's discuss just the rear derailleurs. I'm just curious.


--
- Frank Krygowski


Frank, are you saying that there's no difference between Shimano Tiagra and DuraAce? Please mak3e that clear.


No, Tom. And damn, I'm trying to ask a serious technical question! Don't
ascribe evil intent to a question about mechanical design!

At least some people say there is a difference in feel or performance
between different levels of Campy equipment. Ditto for top levels of
Shimano equipment. I'm a mechanical engineer. I'm curious about the
mechanical reasons for the differences.

--
- Frank Krygowski


Frank, whatever you were trying to do certainly didn't look serious. The top line components aren't just polished more. Their entire interior components are not just built to more accurate standards and better materials but often use entirely different bearings or bearing material.

Unlike what Jay seems to believe, Ultegra is not last year's DuraAce And next year's Ultegra won't weigh almost half of today's Ultegra group as DuraAce does today.

It is a choice of building to a price point and what is necessary to do so.
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