Chainring

[rcannon100]

@americancyclo 93024 wrote:

I always ride in the big ring on my Bad Boy. You want my middle chainring?

YES!

So the middle is a 38 104 mm. And apparently (of course), that is unusual. Very unusual. So far two LBSs have been left shrugging their shoulders. EDIT: Yeah, even Bike Nashbar dont got it.

I see online a chainring 38 104mm but it is listed as 10 speed. My Cannondale BB is an 8 speed. That’s something I am going to have to match too???

The last LBS found an old crankset hidden under a rock – but it is a shimano crankset which requires a longer bottem bracket. I got a 118 and it needs a 122? So they are going to order me a new bottom bracket too.

Is there a difference in quality of chainrings? I mean I guess I dont want one that is rivetted cause I want to be able to swap out the rings. Otherwise??

UPDATE: Yeah, all I see online is 38t 104mm for 10 speed.

So that means to fix this I am looking at replacing the whole crank set??

[DismalScientist]

Well, if you “ALWAYS” ride in the middle ring, just change the setup into a 1×8 and be done with it.:rolleyes:

The number of speeds shouldn’t matter. I think they only put out new derailleurs and cranks for higher speeds so they can charge more. (9 and 10 speed chains are narrower, so are different, as are shifters.)

118 mm bottom brackets seem narrow for triple cranksets.

[cyclingfool]

Not sure that 10-speed designation actually makes a big difference. Neither is Sheldon Brown.

Disclaimer: I am not a professional bike mechanic, and I didn’t even stay at a Holiday Inn Express last night.

[cyclingfool]

@DismalScientist 93061 wrote:

118 mm bottom brackets seem narrow for triple cranksets.

118 sounds reasonable to me. My triple crankset is on (and calls for) a 113 mm bottom bracket spindle. 113 or 118 (don’t recall which at the moment) is what comes on the stock Surly LHT, which has a triple crankset.

[americancyclo]

@rcannon100 93055 wrote:

YES!

So the middle is a 38 104 mm.

What year is your Bad Boy? Mine is a 2003 and it has a Sugino MX-300, 22/32/44 teeth

according to Bikepedia.
http://www.bikepedia.com/quickbike/BikeSpecs.aspx?year=2003&brand=Cannondale&model=Bad+Boy

32 tooth chain rings are pretty easy to find.

[DismalScientist]

I think I had a 118 with a plastic spacer with a 1984 Shimano N600 triple. (I converted to a sealed bottom bracket from the old cup and cone from the ancient past.) The spacer broke and my inner chainring did a number on the paint on the seat tube. Of course, I may have misremembered the axle length or maybe old triples were wider.

[rcannon100]

@americancyclo 93070 wrote:

What year is your Bad Boy? .

I think it is a 2005. It was stolen, er, I mean I bought it on Craiglist. It may have been mod. The guy I bought it from said he had returned it to pretty much the original config. The LBS said the chainrings were pretty much a touring config. Which sorta makes since the BB is a bastard step child – neither a mountain nor a road bike and not even really a hybrid. Again, I live in that 38 (except for the Arlington hill, where I pretty much just call a taxi).

If I just got a new crank set, it would probably be a 36 in the mid. That’s what is available.

[americancyclo]

2008? Based on your claim as last year made in USA
http://www.bikepedia.com/quickbike/BikeSpecs.aspx?year=2008&brand=Cannondale&model=Bad+Boy

Shimano M341, 28/38/48 teeth

Would this work?
RaceFace Turbine 38x104mm 10 speed Chainring Black

[Crickey7]

My 2003 BB Ultra has a Truvativ crank. And I don’t know about that parts spec on Bikepedia, becuase mine had a bunch of crappy CODA parts that died one by one and were replaced.

[Harry Meatmotor]

@ShawnoftheDread 92974 wrote:

Always ride in the big ring. Problem solved.

sur la plaque!

[rcannon100]

Yes Sir!

[ATTACH=CONFIG]6463[/ATTACH]

Yeah, based on what yousse guys are telling me, sounds like that would work. That will be Plan B. The LBS has a used crank and ordered the 122 mm bottom bracket. If they come through, I will go with that. If they dont, I will buy this chainring and do it myself.

Of course, the real solution is that this arrives today:

Just steal it from The Kid.

(it may come to happy hour if he bribes the mechanic well enough)

[DismalScientist]

I would buy a new crankset before I would pay $50 for a chainring.

[KLizotte]

@rcannon100 93077 wrote:

Of course, the real solution is that this arrives today:

Just steal it from The Kid.

(it may come to happy hour if he bribes the mechanic well enough)

Hasn’t the Kid heard of hand-me-downs?!

[peterw_diy]

@rcannon100 93055 wrote:

apparently (of course), that is unusual. Very unusual. So far two LBSs have been left shrugging their shoulders. EDIT: Yeah, even Bike Nashbar dont got it.

[off topic] “Even”? Nashbar (and their dull twin, Performance) hasn’t been a good source for parts for years. (They don’t even routinely carry ball bearings anymore.) Try Universal Cycles or maybe Niagara.

[hozn]

@DismalScientist 93079 wrote:

I would buy a new crankset before I would pay $50 for a chainring.

Really? I would be pretty wary of a crankset that cost less than $50 … $50 is a pretty normal price for a [new] chainring, especially machined (not stamped) chainrings.

[Author]

Posts