Upgrade from 10 speed to 11 Giant Defy Adv 2 2012

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Steague86
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Joined: 8 May 2018, 12:56pm

Upgrade from 10 speed to 11 Giant Defy Adv 2 2012

Postby Steague86 » 8 May 2018, 1:00pm

Hi all, new to cycling and the forum. Looking at changing the cassette on my Giant Defy Adv 2 2012 from the 10 speed ultegra I have (12-25 I think) to an 11 speed 11-32. Is there any reason this bike wouldn’t take the straight swap to the 11 speed? Any other consideration I should make before ordering the new cassette?

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Graham
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Re: Upgrade from 10 speed to 11 Giant Defy Adv 2 2012

Postby Graham » 8 May 2018, 2:03pm

Steague86 wrote:Looking at changing the cassette on my Giant Defy Adv 2 2012 from the 10 speed ultegra I have (12-25 I think) to an 11 speed 11-32.

Is there any reason this bike wouldn’t take the straight swap to the 11 speed?

10-speed Ultegra will have controls with TEN positions.
Unless you are currently using downtube shifters WITHOUT indexing, how are you going to get ELEVEN positions ?

? Have you costed new controls to get eleven positions ? . . . and all the other equipment requirements to get eleven-speeds ?

? Is the total cost to get eleven-speed - a single extra gear - really worth that much ?


Steague86 wrote: Any other consideration I should make before ordering the new cassette?

What you seem to really be after is some lower gears ( hence 32 teeth ).

The current rear derailleur may be your only constraint for maximum sprocket size.
Why not stick with ten-speed and get a new 10sp sprocket ( and if necessary a new rear derailleur to cope with it ) ?

PeterBL
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Joined: 26 Oct 2010, 1:04pm

Re: Upgrade from 10 speed to 11 Giant Defy Adv 2 2012

Postby PeterBL » 8 May 2018, 2:41pm

As graham says, the shifter needs to be indexed for the correct number of gears. So you need to change the most expensive component of your bike (except frame).

Also, an 11 speed cassette will not fit an 8, 9, 10-speed freehub. So you need a new freehub, maybe new wheels.

Look for the gearing you seek in 10 speed instead, would be my advice.

Steague86
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Joined: 8 May 2018, 12:56pm

Re: Upgrade from 10 speed to 11 Giant Defy Adv 2 2012

Postby Steague86 » 8 May 2018, 4:27pm

Thanks all. So best option and most cost efficient just sticking with a 10 speed then. I did get the bike for free, so don’t mind spending some money, but if it’s not going to give me a huge difference between a 10sp 28 then I’ll just stick with that.

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Graham
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Re: Upgrade from 10 speed to 11 Giant Defy Adv 2 2012

Postby Graham » 8 May 2018, 7:09pm

Be aware that with your 2nd-hand bike . . . . . . .

Unless you know the history of the current chain it is possible/likely that you will have to replace the chain at the same time as you replace the cassette.

There is a lot of info about measuring chain wear on this forum, but as a self-declared beginner it will be easier to simply buy a new one along with the cassette.

Other forum contributors, who are familiar with Ultegra, should be able to tell you whether your current rear derailleur mech will happily manage a cassette with 28 teeth.

If you want to check whether rear derailleur will handle 32 teeth, we will need to know :-
What model of existing rear derailleur ?
The actual count of teeth on the largest and the smallest sprockets ( on the proposed new cassette )
The actual count of teeth on the largest and smallest existing chainrings.

keyboardmonkey
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Re: Upgrade from 10 speed to 11 Giant Defy Adv 2 2012

Postby keyboardmonkey » 8 May 2018, 8:30pm

Steague86 wrote:Thanks all. So best option and most cost efficient just sticking with a 10 speed then. I did get the bike for free, so don’t mind spending some money, but if it’s not going to give me a huge difference between a 10sp 28 then I’ll just stick with that.


Do you have a cassette with a 28 largest sprocket or 25 as mentioned originally? Either way I assume a 2012 Giant will have 6700 Ultegra so when you replace whatever you have I recommend a (12-30) “cassette and chain bundle” such as this one:

http://www.chainreactioncycles.com/mobi ... cat=direct

Some people will recommend the KMC chain, but I have the 6701 chain on my Giant.