46/30 rings for Campagnolo H11?

jambee · #1 08-26-2022, 05:24 AM

I've spent a week in the mountains riding up and down in the French Alps. I realized that when riding about, as opposed to touring, having a light bike with gears i can use will be a useful experiment.

Thinking about my lightest bike, my Seven Mudxium (evergreen before it got the name), I was interested in swapping the Campagnolo H11 rings (50/34), to 46/30 rings to give it a try.

Any idea who makes such replacement rings? I see that absolute black makes some sub compact but not for Campy H11. Any other ideas?

domesgique · #2 08-26-2022, 07:37 AM

T.A. Specialites makes replacement rings that will fit the H11 and other 2015+ eleven speed cranksets, but they only go down to a 34T. That might be the limit for the crankset.

I use a 46T from them on my cyclocross bike. It works well.

To get something smaller, you may need to switch to a 12 speed Chorus crankset to get a 32T, but it'll have a 48T outer ring. And it has a different bolt hole circle than the H11, or any of the other cranksets.

gorkypl · #3 08-26-2022, 09:04 AM

You will need a 3rd party crankset (and so a new bottom bracket) for 46/30.
For Campagnolo BB the smallest chainring combo you can get is 48/32 from 12s Chorus.

Dave · #4 08-26-2022, 12:45 PM

A Shimano GRX crank is cheap and will work.

Clean39T · #5 08-26-2022, 12:48 PM

Quote:

Originally Posted by jambee

I've spent a week in the mountains riding up and down in the French Alps. I realized that when riding about, as opposed to touring, having a light bike with gears i can use will be a useful experiment.

Thinking about my lightest bike, my Seven Mudxium (evergreen before it got the name), I was interested in swapping the Campagnolo H11 rings (50/34), to 46/30 rings to give it a try.

Any idea who makes such replacement rings? I see that absolute black makes some sub compact but not for Campy H11. Any other ideas?

The FD may struggle with rings that small..

It's possible you could run a GRX FD though - would be curious if others have done that?

jambee · #6 08-26-2022, 12:55 PM

Thanks for the suggestions. Dan, I'm eyeing your eewings crank off the desalvo...

slowpoke · #7 08-26-2022, 01:12 PM

Hi Jambee, as others mentioned, the BCD won't allow you to go down to a 30t small ring. I'm running the Easton EA90s 46/30 with no problem (I'd shy away from the carbon EC90s).

jch3n · #8 08-26-2022, 01:40 PM

Quote:

Originally Posted by Dave

A Shimano GRX crank is cheap and will work.

GRX has a +2.5mm outboard chainline that may not work with the Campy FD.

A third-party crank like Easton or Rotor is probably your best bet. If you have a braze-on FD, you may need a front derailleur extender/adapter mount to be able to get it low enough. There are options from FSA, Croder, and WickWerks.

Dave · #9 08-26-2022, 03:00 PM

Quote:

Originally Posted by jch3n

GRX has a +2.5mm outboard chainline that may not work with the Campy FD.

A third-party crank like Easton or Rotor is probably your best bet. If you have a braze-on FD, you may need a front derailleur extender/adapter mount to be able to get it low enough. There are options from FSA, Croder, and WickWerks.

The grx chain line is easily corrected with 2mm spacing washers. The chain rings mount behind the spider, so washers move the rings inward. I have four of them in use with the corrected chainline.

The 46/30 is only $145.

NHAero · #10 08-26-2022, 03:16 PM

Quote:

Originally Posted by Clean39T

The FD may struggle with rings that small..

It's possible you could run a GRX FD though - would be curious if others have done that?

No idea about Campy FDs here, but I run 46/34 on my Firefly and 44-28 on my Bingham with Dura Ace 9100 FD and it works with those smaller rings. I'd be curious about a FD that is more purpose-built for the smaller rings, but shied away from the GRX due to chainline.

jtakeda · #11 08-26-2022, 05:17 PM

I have 46/30 on a campagnolo 11 FD and it works just fine.

If you want to use a GRX crank you can use a sram wide spacing adapter assuming you have a clamp on FD.

jambee · #12 08-30-2022, 08:46 AM

Quote:

Originally Posted by NHAero

No idea about Campy FDs here, but I run 46/34 on my Firefly and 44-28 on my Bingham with Dura Ace 9100 FD and it works with those smaller rings. I'd be curious about a FD that is more purpose-built for the smaller rings, but shied away from the GRX due to chainline.

I'd love to see these builds @nhaero

Andy340 · #13 08-30-2022, 10:25 AM

I just replaced a record 46/34 with a rotor aldhu 24axle with 46/30 rings on gravel bike - for H11 you would probably need the offset axle but chain line numbers might not perfectly match up. Works great for me so far and front shifts fine on chorus 2015+ mech

xterra_dan · #14 08-30-2022, 10:27 AM

Not cheap, but I love the White Industries cranks for a sub compact option.

sg8357 · #15 08-30-2022, 10:32 AM

Quote:

Originally Posted by Clean39T

The FD may struggle with rings that small..

It's possible you could run a GRX FD though - would be curious if others have done that?

I tried the 10s GRX front mech with 10s Campaq Record,
mech spring was too strong, shift lever felt like it would break.

Used the IRD SubCompact mech, with Sugino OX 46/30
shifts well.

https://www.interlocracing.com/shop/...rch=derailleur

If you need a 10s GRX front mech, let me know.