38x26 chainrings for 11spd - do these exist?

[d_douglas]

I am trying to figure out how get great gearing on a gravel bike. I think a 38t is ideal and a 26 or so would be the bailout gear. I want to use these on a 110mm Sugino crank and use a 11-34t or so cassette.

Is there such a thing as 11spd compatible rings that would work on these cranks?

Thanks,

Darren

[mhespenheide]

Historically, 34t is the smallest that fit on a 110mm BCD.

Praxis has now come out with a 32t ring that fits on 110, and I've heard rumors of a 30t from FSA on a four-arm design 110.

But I think a 26t is physically too darn small to fit onto 110BCD. I just don't think you can squeeze it in.

I think you'll have to go to a 94mm BCD crank, use the middle and inner of a 110/74 triple, one of the newer models that use a replaceable spider, or the old-school Rene Herse crankset.

[d_douglas]

Sorry, maybe I was unclear (or misunderstand)

I meant to suggest a 110 x38t and a 74 x 26t set. Essentially, use a modern triple and ditch the large chainring.

Does that make sense?

[owly]

Found a couple on the SJS Cycles site (UK).

5 arm.

TA Specialites.

38t 110bcd
26t 74bcd


The actual TA Specialites site (French) should have the most up to date range available.

[oldpotatoe]

Originally Posted by d_douglas

Sorry, maybe I was unclear (or misunderstand)

I meant to suggest a 110 x38t and a 74 x 26t set. Essentially, use a modern triple and ditch the large chainring.

Does that make sense?

Perfect sense and a great way to get way low 'subcompact' gearing..TA has 'em, as has been mentioned. Use short 'track' CR bolts for the new 'big' ring.

[NHAero]

Look up threads here where Mark McM talks about using SRAM Force road cranks with detachable spider, and substituting MTB spider and rings. I'm running 42-28 on my drop bar 26er, with a 11-40 cassette (11s). And the other chainring combo available is 39-26.

[echelon_john]

I'm doing similar on my BMC; I had a Middleburn 110/74 triple that I was running the 26 inner, 36 middle and a chainguard in the outer ring position. Felt the gearing was a bit low, esp with a wide range cassette, so just changed it to a 30/46 using an FSA inner ring and a TA 46 middle ring from Peter White, with a bigger chainring guard. Works great; I had to reverse the orientation of the inner ring to bring it a little closer to the middle ring but it shifts quite well. Not as well as a Force 36/46 11sp setup on my other bike, but well enough for this type of bike.

[Mark McM]

Originally Posted by NHAero

Look up threads here where Mark McM talks about using SRAM Force road cranks with detachable spider, and substituting MTB spider and rings. I'm running 42-28 on my drop bar 26er, with a 11-40 cassette (11s). And the other chainring combo available is 39-26.

Since that thread, another spider option has appeared - Engin Cycles (in Philadelphia) has released a 110/74 spider that fits SRAM Force cranks. These are intended to be used with Sugino OX chainrings (made for Sugino's 110/74 OX series cranks), although standard 110mm middle chainring and 74mm inner chainring can also be used. Recently, IRD released their Lobo cranks, which also have a 110/74 spider. While the Lobo crank is intended for "adventure bikes" and have a wider stance width (q factor) and chainline than road cranks, the Lobo chainrings can be used with the Engin spider.

[Hindmost]

I've done this twice with Veloce cranks on an old school mountain bike and on a cyclocross frame. I've tried the 111 and the 115 mm spindles. At 115 the q-factor felt wide on the cyclocross frame and 111 felt better but compromises the small small cross-over gearing.

[AngryScientist]

Are you preparing to ride with me this summer??



https://forums.thepaceline.net/showthread.php?t=246200

[d_douglas]

Originally Posted by AngryScientist

Are you preparing to ride with me this summer??



https://forums.thepaceline.net/showthread.php?t=246200

Sure! I need to get my fitness up for that though

You should also come to Victoria...

[AngryScientist]

Originally Posted by d_douglas

You should also come to Victoria...

in the planning stages now!

[edward12]

If I understand your question correctly, then a White Industries VBC road or mtb crankset with 38/26 rings should work - even with 11 speed.

I have this setup with a 10 speed rear derailleur and 11-34 cassette and it works great.

Hope this helps.

[mjb266]

Could you rig up a XTR double from a few years back? Might mess up the Q-factor.

[PacNW2Ford]

Originally Posted by d_douglas

Sorry, maybe I was unclear (or misunderstand)

I meant to suggest a 110 x38t and a 74 x 26t set. Essentially, use a modern triple and ditch the large chainring.

Does that make sense?

According to Peter White, TA rings won’t work on a Sugino inner as the bosses don’t place the ring at the right spacing. They are designed as Shimano replacements. Just the messenger.