Shimano Components - What's the Difference?

[Angelfishsolo]

S/A is still used on Trike's (for both both gears and hub brakes). I was playing about with single and double seat models today.

 

[alecstilleyedye]

but for drops? and derailleurs?

i've seen a 5 speed sturmey gear lever (style?) derailleur bike. belonged to a danish friend of mine.

 

[bonj2]

how does sram work?

I don't know technically how it does it, but it's basically what's the upshift lever on shimano and campag, if you push it a bit then release it it releases tension (changes to smaller cog), if you push it further, then it increases tension, and shifts to a bigger cog.
You might well say "when you're downshifting, why doesn't it upshift first!?" - the answer is it just doesn't! i can only assume it must be the release which actually does the changing but it's lightning fast anyhow. I think it might be the release rather than the press which does the shift on shimano and campag anyway.

 

[Angelfishsolo]

In other words it is 'black box' technology.

I don't know technically how it does it, but it's basically what's the upshift lever on shimano and campag, if you push it a bit then release it it releases tension (changes to smaller cog), if you push it further, then it increases tension, and shifts to a bigger cog.
You might well say "when you're downshifting, why doesn't it upshift first!?" - the answer is it just doesn't! i can only assume it must be the release which actually does the changing but it's lightning fast anyhow. I think it might be the release rather than the press which does the shift on shimano and campag anyway.

 

[PpPete]

In other words it is 'black box' technology.

And as such justifies my decision to stick with down-tube levers.....


he says (smirking) and, having lit blue touch paper retires to a safe distance

 

[trsleigh]

no one uses sturmey archer these days, they're old hat. Even you shouldknow that. Only for three-speed hub gears oldwomen's 1960's shopping bikes. No real place in the 21st century (debatable as to whether they've even got one inthe 20th.)

Damn cheek, suggest pistols at dawn. Have you never heard of Brompton sir?

 

[Mortiroloboy]

well, yes, but it is a correct opinion.

I thought you had resigned your position?

 

[fossyant]

I can see the SRAM double tap system being good - I can 'visualise' how it works... BUT...

This is an Shimano thread......

The further up the groupset you go, the better the kit gets and the better it is able to deal with poor weather..... they all need servicing about the same..... (or blooming not as most people see bikes)..........

Weight drops etc....... Tiagra and 105 are pretty good these days........ TBH.... if you look after your kit it will last.

Spend more on bearings . e.g. hubs, Bottom brackets, headsets etc..saves a load of hassle...

I have 15 plus year old parts from Shimano Ultergra and Dura Ace running like new......