What are my chainring options? for 130mm BCD cranks

[MRB]

Hi Group,

What sizes of chainrings are available for 130mm BCD cranks (double)?
I was hoping there was a plethora of sizes available. So that I could put a 39 / 48 on my wife's Kirk, but it looks like all that is available is 39, 40, and 42 inner and 52, 53 outer.

I plan on using 9 speed drivetrain, maybe 8 speed.

I think I see why DBRK likes the 110mm BCD solution.

size matters....smaller is better.

TIA,

MRB

[Rapid Tourist]

I think your options are really unlimited. I called Harris Cyclery recently to buy some 130 bcd chainrings and they have almost every size you can imagine. Google Harris Cyclery. Call them. They are very helpful.

[eddief]

for instance, here is the link to Salsa rings at aebike.com.

Salsa has a bit more selection than Shimano, but rings may not be ramped and pinned.

http://aebike.com/site/page.cfm?sort=Price&PageID=30&Category=203&Brand=359&currentpage=2

[MRB]

Thanks for the info, I will check the links (Harris and Salsa).

thansk again for the Fast replies! ... almost instant!

- M

[Bradford]

Harris is where I got mine. It's a local shop for me, but I think they do things through the mail also.

[christian]

Peter White has TA rings in 130bcd. Available in 38-56t, all inclusive.

- Christian

[Louis]

This page at Harris is nice because it tells you how small a ring you can put on a given BCD crank:

http://www.sheldonbrown.com/harris/chainrings.html

In your case, for 130 that's a 38T inner ring.

Louis

[Marburg]

This post is redundant, but who am I to care.

Yes, 130 BCD goes down to 38. Shimano offers a relatively small selection, but with some hunting you can find alternatives in a variety of sizes. I think FSA has a selection, TA Specialties as noted, Salsa/Sugino/QBP, Blackspire. A trip through the QBP catalog will will likely give you a couple of options, none too esoteric.

In general more $$$ will buy a more 'engineered' ring with ramps and pins and whatnot. Of course in a double, only the outer ring needs ramps and pins, eh?

[Ken Robb]

and with 110 you can go at least down to 34--big difference.

[jckid]

I think the main thing he's looking for is a smaller OUTER ring. I've considered this too. Maybe a 50T outer ring instead of a 52T. I found a 50T on Harris Cyclery's website. It says it's a "B-type" and should be used in conjunction with "B-type" rings. What exactly does that mean? Would it work with my Ultegra triple 30-39-52 (i.e. replacing the 52 with a 50)?