[Albec1]

Could someone confirm it’s OK and simple to switch from a 36/46 chainring to a 34/50?  Would I need to raise the front mech?  Any other considerations?

Existing components:

105 5800, 172.5 36/46, 11 sp, HG600 105 chain, 11-28 cassette, short cage

Very many thanks

Topic

[Albec1]

madcarew wrote:

As mentioned you will need to check your chain length to make sure it’s not too short to go big to big (I know you’re not supposed to do that, but if you do shift into it you stand to do damage to chain, rear mech and frame etc.) You will definitely need to raise the front mech too. It should clear the big chain ring teeth by about 2-3 mm.

Good to know, thanks for the tip

[Albec1]

VeloUSA wrote:

Verify your chain length. Go here for sizing calculations.

http://www.parktool.com/blog/repair-help/chain-length-sizing#article-section-4

Many thanks

[madcarew]

As mentioned you will need to

As mentioned you will need to check your chain length to make sure it’s not too short to go big to big (I know you’re not supposed to do that, but if you do shift into it you stand to do damage to chain, rear mech and frame etc.) You will definitely need to raise the front mech too. It should clear the big chain ring teeth by about 2-3 mm.

[VeloUSA]

Verify your chain length. Go

Verify your chain length. Go here for sizing calculations.

http://www.parktool.com/blog/repair-help/chain-length-sizing#article-section-4

[Albec1]

kil0ran wrote:

That will work fine, and yes I would imagine you’ll need to raise the front mech a tad which in turn will need a cable adjustment. Probably an hour’s work tops.

Are you after more top speed or lower gearing for climbs? If the latter you could always swap the inner chainring from 36 to 34, no mech adjustment would be required then.

It’s optimum speed I’m after.  Thanks for your feedback, that’s good to know.  Regards,

[kil0ran]

That will work fine, and yes

That will work fine, and yes I would imagine you’ll need to raise the front mech a tad which in turn will need a cable adjustment. Probably an hour’s work tops.

Are you after more top speed or lower gearing for climbs? If the latter you could always swap the inner chainring from 36 to 34, no mech adjustment would be required then.

[Author]

Replies