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The IRO BFSSFG Build Thread

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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

The IRO BFSSFG Build Thread

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Old 09-13-07 | 06:03 PM
  #576  
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Originally Posted by bward1028
holy seatpost, batman!
Yeah, no kidding. This is the closest I've come to getting a fixed gear that actually fits me, too. I'm giving it a chance, trying to get everything worked out before moving on to something else.

Originally Posted by bonechilling
I'm not going to post this to the thread because it's so huge, but here's the high res picture of my IRO with Open Pro CD rims.
Damn, I should've bought the CDs.
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Old 09-13-07 | 06:25 PM
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Originally Posted by In Absentia
Here's mine with black Open Pros. It's a terrible picture taken inside at night from a ****ty angle, but it's the best I have at the moment. You can barely tell that the OPs are black because the box section is so short and the braking surface is machined, so unless you look closely, they just kind of look like silver rims.



I'll hopefully be taking some decent pictures soon and posting the full specs after I swap the bottom bracket out and move the chainring to the inside to fix the RD2 chainline issue.


What kind of chainring is that?
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Old 09-13-07 | 06:26 PM
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BTW, what is the RD2 chainline issue?
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Old 09-13-07 | 06:27 PM
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FSA Pro Road.
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Old 09-13-07 | 06:28 PM
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With the recommended bottom bracket, the chainline is 45 mm instead of 42.
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Old 09-13-07 | 06:49 PM
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So if I'm buying Sugino RD Crank Set from Harris Cyclery (https://sheldonbrown.com/harris/cranks/130-single.html), I'm going to have a problem if I order the matching Sugino 103 mm Bottom Bracket BB105 listed right below it? This is for the IRO BFSSFG frame.
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Old 09-13-07 | 09:26 PM
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Originally Posted by jayrooney
just go ride your $150 frame and quit worrying about the paint.
i can't wait for mine to get a little character. i feel like a choad riding this perfect-looking bike around. BRING ON THE SCRATCHES B!TCHES
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Old 09-13-07 | 09:32 PM
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Originally Posted by pazzmore
i can't wait for mine to get a little character. i feel like a choad riding this perfect-looking bike around. BRING ON THE SCRATCHES B!TCHES
I always remember the Car Talk guys saying that new cars should come "pre-dinged," so that owners of new cars wouldn't flip out their someone opens a door into their side panel or scratches their bumper parallel parking. I don't see why we can't extend that to bikes!
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Old 09-13-07 | 10:13 PM
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Originally Posted by Southernwayfare
So if I'm buying Sugino RD Crank Set from Harris Cyclery (https://sheldonbrown.com/harris/cranks/130-single.html), I'm going to have a problem if I order the matching Sugino 103 mm Bottom Bracket BB105 listed right below it? This is for the IRO BFSSFG frame.
Correct. Unless your rear hub and cog combination also has a 45 mm chainline.
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Old 09-13-07 | 10:19 PM
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How do I find out what the chainline is for the rearhub and cog? I'm planning on buying a Deep V/Formula Hub wheelset that's machine built (I assume b/c its not built in the shop). Is there another bottom bracket to buy instead?
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Old 09-13-07 | 10:32 PM
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heres mine.. took the pics the day I got it. I need to make a few small adjustments, but its a pretty good ride.
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Old 09-13-07 | 10:37 PM
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Originally Posted by Southernwayfare
How do I find out what the chainline is for the rearhub and cog? I'm planning on buying a Deep V/Formula Hub wheelset that's machine built (I assume b/c its not built in the shop). Is there another bottom bracket to buy instead?
With a track cog, it's going to be 42 mm. The only way around it is to buy a bottom bracket with a 107 mm spindle and mount the chainring on the inside position on the cranks.
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Old 09-14-07 | 12:07 PM
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Originally Posted by In Absentia
With a track cog, it's going to be 42 mm. The only way around it is to buy a bottom bracket with a 107 mm spindle and mount the chainring on the inside position on the cranks.
Of course that's not the only way. You could re-space and re-dish the wheel too.

I could be wrong, but couldn't you also just get a bottom bracket with a spindle length that resulted in a good chain line with the chainring on the outside?
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Old 09-14-07 | 12:17 PM
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Originally Posted by skanking biker
See, I am not the only one who has heard this: https://bb.nsmb.com/showthread.php?t=29467

[edit]: see also: https://www.bikeforums.net/archive/in.../t-181553.html
those guys aren't exactly experts:

"black=1.8mm metal and .2mm of paint
silver=2.0mm of metal and 0mm of paint"

If the spokes are annodized they are losing .01m-.015mm of material or .5%-.75% of the material. or wait.. maybe even half that, i cant remember.
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Old 09-14-07 | 01:11 PM
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Originally Posted by dmotoguy
those guys aren't exactly experts:

"black=1.8mm metal and .2mm of paint
silver=2.0mm of metal and 0mm of paint"

If the spokes are annodized they are losing .01m-.015mm of material or .5%-.75% of the material. or wait.. maybe even half that, i cant remember.
Not saying they are, not saying its true, but I tend to believe it given what a well-respected wheel builder told me.
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Old 09-14-07 | 01:41 PM
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Originally Posted by kemmer
Of course that's not the only way. You could re-space and re-dish the wheel too.
True, if you don't mind not being able to flip your flip-flop wheel over (which, I imagine, a lot of people don't).

Originally Posted by kemmer
I could be wrong, but couldn't you also just get a bottom bracket with a spindle length that resulted in a good chain line with the chainring on the outside?
Unfortunately, I don't think anyone makes a bottom bracket with a 97 mm spindle.

After posting this last night, I decided to go ahead and swap the bottom bracket out to fix the chainline. After putting in my UN-54 107 mm BB and switching the chainring to the inside, the chainline was even further off, but to the inside instead of outside. Every time a new inside link tried to mesh onto the cog, the side plate would sit on top of the tooth at first and then drop down onto it after it turned a little further, creating a loud click and rattling the chain around. It was constantly trying to derail.

So, even though I knew it wouldn't work, I decided to move the chainring back to the outside position while leaving the UN-54 BB in just as an experiment. It was basically the same as on the inside, but too far out instead of in. No surprise.

Ultimately, I decided to just put the Sugino BB-3 back in since the chainline was at least closer to correct and I now have a new appreciation for my chainline being almost correct. In fact, it almost seems like the chainline is better now than it was before. Maybe all of that removing and remounting the cranks expanded the holes a bit, so it sits further in now.
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Old 09-14-07 | 01:49 PM
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Originally Posted by dmotoguy
those guys aren't exactly experts:

"black=1.8mm metal and .2mm of paint
silver=2.0mm of metal and 0mm of paint"

If the spokes are annodized they are losing .01m-.015mm of material or .5%-.75% of the material. or wait.. maybe even half that, i cant remember.
If you read the thread from the BF mechanics forum, it sounds plausible, especially since it seems like some of them are mechanical engineers. At least one of the posters was saying that it's not about making the spoke thinner, it's about the outer layer of the spoke being made harder through anodizing. Then, when the spoke flexes, the harder oxide layer cracks more easily and, once those cracks are there, they are more easily transferred into the softer, inner portion of the spoke.
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Old 09-15-07 | 12:32 AM
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quick question, what size seat clamp did you guys buy? thanks.
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Old 09-15-07 | 01:39 AM
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Originally Posted by In Absentia
the harder oxide layer cracks more easily and, once those cracks are there, they are more easily transferred into the softer, inner portion of the spoke.
wait.. doesnt all aluminum have an oxide layer? isnt annodizing just twice as thick? hm.. we are talking such small differences here..
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Old 09-15-07 | 03:07 AM
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Spokes are made of stainless steel, not aluminum. Also I'm not advocating either view; I was just relaying what I could understand from the discussion in the other thread.
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Old 09-15-07 | 03:08 AM
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Originally Posted by fayjairay
quick question, what size seat clamp did you guys buy? thanks.
I just got it from IRO with a clamp, but I know that the size has been posted in this thread at least twice. You could probably find it pretty quickly searching or scanning through the thread.
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Old 09-16-07 | 08:21 AM
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My build is nearly finished. All I need to do now is tape & varnish the bars....
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Old 09-16-07 | 08:38 AM
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Still waiting on my wheels. I think, I may actually have some next week.
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Old 09-18-07 | 05:05 PM
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The wheels are now finished, but I didn't get the tires I wanted. Anyway, got her built and here are the results.







Sorry, I suck at photography and have a crappy digital camera.

Last edited by lvleph; 09-18-07 at 05:14 PM.
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Old 09-20-07 | 03:17 PM
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Bikes: 89 Bridgestone MB-3, 93 Bridgestone RB-1,93 Bridgestone MB-1, 95 Klein Fervor, 02 BikeE AT, 06 Surly Cross-check, 8? Schwinn Frontier

Here's mine. Still working out the handlebar choices, thus the badly wrapped bar. Probably not final version but then again it never is. It originally came with a mismatched frame/fork (fork was 1", frame was 1 1/8") but I kept the frame, added reducers and swapped in a 1" carbon fork I had lying around.

Rides nice but I think I will swap the bars out for some sort of drops. Tried a pair of the Major Taylors from SOMA but that was just uncomfortable. Tried flat bars but that last about 10 miles before I was dying for some other hand position. Just going to put some drops in next.

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