Singlespeed & Fixed Gear - chainline w/ sugino rd

I got this crank in conjunction with a 103mm fsa bracket (from harris under their recommendation) because it's supposed to give me a 42mm chainline. well... the outside position of this road double gives me 45mm, while the inside gets me 40mm.

how do I reconcile about 2mm?
- file down the cog
- add a spacer, if one exists, on the cog thread
- alter the centerline of the hub (unbalance the locknut washers) and dish the wheel – don't really want to.
- shave a little of the spindle to force crank in further
- or coldset the stays to compensate for the difference?

any help greatly appreciated!
-c

New BB.

On my old Peugeot I used a Sugino RD with a 107 Shimano BB (if my memory serves me right) that I got from Cycle Smithy for ~ $15.

You could maybe use a spacer on the bottom bracket (between drive side cup and the bb shell)...

The 107 should serve you better (as monkey noted). The extra 2mm on the drive side will give you the 42mm you need with the ring on the inside.

I used the 107mm Shimano and the Sugino RD (both from Harris) on their reccomendation (also using an ENO hub), and it worked perfectly. I'd go 107.

Steak, I may actually have a spare Shimano 107 BB. If you want I can dig around for it.
Yours for 1 beer.

Now I'm confused. Which are the RD's? I thought the RD's were regular road cranks-- just marketed as fixed/single speed cranks for cheap, but there seem to be a few different versions of this crank floating around. This one on harris (http://harriscyclery.net/site/itemdetails.cfm?ID=1467&Catalog=39&sort=Price) looks different than this one (http://store1.yimg.com/I/yhst-3773699254952_1854_1047711) and still different than this one on ebay (http://cgi.ebay.com/NEW-SUGINO-RD-TRACK-FIXED-GEAR-BIKE-CRANKSET-165mm_W0QQitemZ7173789945QQcategoryZ56195QQssPageNameZWDVWQQrdZ1QQcmdZViewItem) Do all of these have positions for the ring on the inside and out?

Steak, I may actually have a spare Shimano 107 BB. If you want I can dig around for it.
Yours for 1 beer.

thanks for the offer monkey, much appreciated. however, harris was on the ball — they offered to replace the 103 with a 107, but when I asked, they sent me rear cog spacers for free instead. I'd really much rather do that, thanks again.

Now I'm confused. Which are the RD's? I thought the RD's were regular road cranks-- just marketed as fixed/single speed cranks for cheap, but there seem to be a few different versions of this crank floating around. This one on harris (http://harriscyclery.net/site/itemdetails.cfm?ID=1467&Catalog=39&sort=Price) looks different than this one (http://store1.yimg.com/I/yhst-3773699254952_1854_1047711) and still different than this one on ebay (http://cgi.ebay.com/NEW-SUGINO-RD-TRACK-FIXED-GEAR-BIKE-CRANKSET-165mm_W0QQitemZ7173789945QQcategoryZ56195QQssPageNameZWDVWQQrdZ1QQcmdZViewItem) Do all of these have positions for the ring on the inside and out?

the rd's that harris sells are "road doubles" that can take it on either end. he.

Steaktaco wrote:

"they sent me rear cog spacers"

I have a collection of cogs, and several of them have two sides, one with a flange and one without.
I find with the Sugino RD crank I can experiement with moving the chain ring to the inner and outer postions and flipping the cog over, and I have found several combinations that give me a good chainline.
The cog spacers sound like an easier fix.
I'd like to know more about that option.

Steaktaco wrote:

"they sent me rear cog spacers"

I have a collection of cogs, and several of them have two sides, one with a flange and one without.
I find with the Sugino RD crank I can experiement with moving the chain ring to the inner and outer postions and flipping the cog over, and I have found several combinations that give me a good chainline.
The cog spacers sound like an easier fix.
I'd like to know more about that option.

never heard of them until today — just thought it would be neat and so I asked them if they had any instead of sending a different lenght spindle. I'll let you know how they are, from the sound of it they have different sizes.

Cog spacers? Why does that sound like a bad idea?

So, if you install a cog spacer before the cog, thus giving you the extra 2mm, towards attaining a 44mm chainline with the ring on the outside of the crank -- would you have enough threads to thread the cg on fully and then after that, enough threads to thread the lockring on FULLY? Given that situation, I'd want all the lockring engagement I can get.

Am I off here?

Cog spacers? Why does that sound like a bad idea?

So, if you install a cog spacer before the cog, thus giving you the extra 2mm, towards attaining a 44mm chainline with the ring on the outside of the crank -- would you have enough threads to thread the cg on fully and then after that, enough threads to thread the lockring on FULLY? Given that situation, I'd want all the lockring engagement I can get.

Am I off here?

no, not at all. that's why I have to wait and see. I AM concerned about the lock ring, skimpy little thing is like 3 millimeters. if this works, great. if not, guess I'll take the longer spindle after all.

Well, the most elegant solution would be the 107mm bottom bracket, but the cog spacer isn't a big deal.

For a while I had to move my cog out 3mm for chainline, and I used a BB lockring threaded on before the cog as a spacer. At least on my nashbar hub with soma cog and dura ace lockring, the lockring was able to engage about 3 threads, which is what they say is necessary for solid engagement. If you only need a 2mm spacer, your lockring is likely to be just fine. I'm inclined to trust Harris, as well, though if you are uncertain, call them and let them know your concern, and see what they say, if they say its cool, it probably is.

peace,
sam

Doesn't anyone else have cogs that have a flange on one side that makes it possible to have the cog line up at two different distances from center by flipping it over?
My EAI cogs all have that flange.

Every cog does, I think... but if you already have it installed with the flange facing inwards and you need still wider chainline, you put on a BB lockring before it - like I did yesterday:-)