Chainline problem

In article <[email hidden]>, MikeYankee

Quoted message said:

From my "Smart Ideas That Turned Out To Be Dumb" Dept.:

Thinking that it would be clever to try double 48 x 36 rings on my next
pseudo-beater, I got a nice Sugino XD triple crank on Ebay with 110/74 mm BCD and a 48 already on
the outer. Installed it with a 107 mm BB, the shortest I have. THE RESULTING CHAINLINE STINKS.
It's about 1 cm or two cogs too far to the right.

Any ideas on how to fix this economically? I've considered:

a) Just use a different [Shimano family] crank with 52/39 as on my other bikes

b) Use a Campy crank and rings, if a bargain presents itself.

c) Keep the Sugino crank, move the 48 ring to the inside of the spider, and put the largest
possible (32?) ring in the granny position. This would fix the chainline but the inside ring
would be too small.

d) Add a granny ring and make it a triple instead of a double, keeping the same chainline, though I
don't really need or like triples.

e) Take up golf.

f) 103mm square taper BB such as FSA Ultimax crmo (about $40)

g) Phil Wood BB (about $130 in steel with rings)

You can also usually steal another millimeter or so with a spacer under the cassette.

--Paul

(MikeYankee) said:

Thinking that it would be clever to try double 48 x 36 rings on my next
pseudo-beater, I got a nice Sugino XD triple crank on Ebay with 110/74 mm BCD and a 48 already on
the outer. Installed it with a 107 mm BB, the shortest I have. THE RESULTING CHAINLINE STINKS.
It's about 1 cm or two cogs too far to the right.

If the 36t ring is 43.5 mm from the center of the frame and you have 130 mm rear spaced frame, the
chainline is proper.

You could get a set of the old style chainring bolts and spacers made for a triple crank with the
chainrings all having the same bolt circle (Stronglight 99 for example) and make up a triple of
50-48-36 but set the front derailleur so it just shifts to the 48 and the 36 (the 50 just acts as a
spacer or a bashguard) You could use a worn out 50 tooth or get a larger ring (52 or 53) and cut off
the teeth. This approach will move the chainrings you us in by the width of one chainring and the
space between chainrings.

Bob Taylor [email hidden] (MikeYankee) wrote in message
news:<[email hidden]>...

Quoted message said:

From my "Smart Ideas That Turned Out To Be Dumb" Dept.:

Thinking that it would be clever to try double 48 x 36 rings on my next
pseudo-beater, I got a nice Sugino XD triple crank on Ebay with 110/74 mm BCD and a 48 already on
the outer. Installed it with a 107 mm BB, the shortest I have. THE RESULTING CHAINLINE STINKS.
It's about 1 cm or two cogs too far to the right.

Any ideas on how to fix this economically? I've considered:

a) Just use a different [Shimano family] crank with 52/39 as on my other bikes

b) Use a Campy crank and rings, if a bargain presents itself.

c) Keep the Sugino crank, move the 48 ring to the inside of the spider, and put the largest
possible (32?) ring in the granny position. This would fix the chainline but the inside ring
would be too small.

d) Add a granny ring and make it a triple instead of a double, keeping the same chainline, though
I don't really need or like triples.

e) Take up golf.

Thanks for your suggestions.

Mike Yankee

(Address is munged to thwart spammers. To reply, delete everything after "com".)

MikeYankee said:

From my "Smart Ideas That Turned Out To Be Dumb" Dept.:

Thinking that it would be clever to try double 48 x 36 rings on my next
pseudo-beater, I got a nice Sugino XD triple crank on Ebay with 110/74 mm BCD and a 48 already on
the outer. Installed it with a 107 mm BB, the shortest I have. THE RESULTING CHAINLINE STINKS.
It's about 1 cm or two cogs too far to the right.

Very odd, and way far from my experience. My Sugino cranks are 94/58mm, but otherwise pretty much
the same, I think. They recommended a 113mm, but since I wanted to use this primarily as a road
double, I went with a 107mm bottom bracket. The chainline is fine.

Quoted message said:

Any ideas on how to fix this economically?

Well, unless the crank design is much different from mine, you'll never be able to use a short
enough bottom bracket to get the right chainline. The "tripleizer" suggestion elsewhere on this
thread is probably the best bet.

What is the rear spacing on this bike? If it is an old bike, with a 5 or 6-speed freewheel, then
maybe that explains the chainline problem.

--

David L. Johnson

__o | It doesn't get any easier, you just go faster. --Greg LeMond _`\(,_ | (_)/ (_) |

Mike-<< Thinking that it would be clever to try double 48 x 36 rings on my next
pseudo-beater, I got a nice Sugino XD triple crank on Ebay with 110/74 mm BCD and a 48 already on
the outer. Installed it with a 107 mm BB, the shortest I have. THE RESULTING CHAINLINE STINKS.
It's about 1 cm or two cogs too far to the right. >><BR><BR>

shimano 103mm BB?

Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
(303)440-3535 vecchios.comvecchios.comOpen ↗ "Ruote convenzionali costruite eccezionalmente bene"

Stronglight also makes a 103 BB with square tapers (don't know about taper compatability with
Sugino). Try www.xxcycle.com. They are in France but ship very fast.

Ron Abramson said:

Stronglight also makes a 103 BB with square tapers (don't know about taper compatability with
Sugino). Try www.xxcycle.com. They are in France but ship very fast.

So does (did) Real and they are readily available here .

--
Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971

Ron Abramson said:

Stronglight also makes a 103 BB with square tapers (don't know about taper compatability with
Sugino). Try www.xxcycle.com. They are in France but ship very fast.

that bb will cost more than the crankset. So will a Shimano DA 103.

Paul Kopit <[email hidden]> wrote in message
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Quoted message said:

Ron Abramson said:

Stronglight also makes a 103 BB with square tapers (don't know about taper compatability with
Sugino). Try www.xxcycle.com. They are in France but ship very fast.

that bb will cost more than the crankset. So will a Shimano DA 103.

TA also makes a 103 with adjustable cups on both sides, uses a shimano compatible tool, a little
cheaper than Stronglight but doesn't include a sleeve between the cups. Same issue about taper
compatibility with Sugino. Also available at xxcycle.

JP

Qui non est hodie cras minus aptus erit.' - Ovid On 28 Nov 2003 15:17:28 GMT said:

Paul-<< that bb will cost more than the crankset. So will a Shimano DA 103.

Quoted message said:

Quoted message said:

<BR><BR>

Really? How much for a TA or shimano 103mm BB and who has them??

T.A. Axix Light - $65.00; in stock (BSC version). Is this one of those instances of "lazy
shopowners" not staying abreast of hardware resources that you're always railing about?

Quoted message said:

this is a loaded question....

Remember to keep your powder dry.
-------------------------------
John Dacey Business Cycles, Miami, Florida Now in our twenty-first year. Our catalog of track
equipment: eighth year online. businesscycles.combusinesscycles.comOpen ↗

John Dacey <[email hidden]> wrote in message
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Quoted message said:

Qui non est hodie cras minus aptus erit.' - Ovid On 28 Nov 2003 15:17:28 GMT said:

Paul-<< that bb will cost more than the crankset. So will a Shimano DA 103.

Quoted message said:

><BR><BR>

Really? How much for a TA or shimano 103mm BB and who has them??

T.A. Axix Light - $65.00; in stock (BSC version). Is this one of those instances of "lazy
shopowners" not staying abreast of hardware resources that you're always railing about?

I think I remembered that Peter said he sells the DA 7410 for ~$55. If correct, it is a very
good price.

Quoted message said:

Paul-<< that bb will cost more than the crankset. So will a Shimano DA 103.

Qui si parla Campagnolo said:

Really? How much for a TA or shimano 103mm BB and who has them?? this is a loaded question....

We have the Real square taper BB with metal ( not plastic) cups at $39.95

Yes, we get a raised eyebrow sometimes but hey you can always save some money by screwing up your
chainline with the wrong size. . .

The better solution is just a Campagnolo crank with matching cartridge BB, complete system double
$105, triple 118.

Would have been nice if Shimano has stayed with the standard taper instead of botching everything up
around 1990. Didn't work any better. For most riders in most applications it just makes chainline
adjustments more painful, no positive aspects at all.
--
Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971

John Dacey <[email hidden]> wrote in message
news:<[email hidden]>...

Quoted message said:

Qui non est hodie cras minus aptus erit.' - Ovid On 28 Nov 2003 15:17:28 GMT said:

Paul-<< that bb will cost more than the crankset. So will a Shimano DA 103.

Quoted message said:

><BR><BR>

Really? How much for a TA or shimano 103mm BB and who has them??

T.A. Axix Light - $65.00; in stock (BSC version). Is this one of those instances of "lazy
shopowners" not staying abreast of hardware resources that you're always railing about?

They were quite a bit cheaper just a couple of months ago. I think I got mine for a little over $50
from Settle Cycles, UK. Buy your euro-components now. The Japanese are determined to maintain the
yen's relatively cheap position (although their determination might come up "short"😉 against the
dollar, but not the EU.

JP