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The '61 Bianchi Speciallisima Gets Phat

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The '61 Bianchi Speciallisima Gets Phat

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Old 02-05-16, 10:39 AM
  #26  
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Originally Posted by jyl
Played on St. Sheldon's calculator. Looks like 46/44 chainrings x 12-23 8-speed cassette x SA hub wide range gives

- Three ranges of gears, corresponding to SA hub 1 (-25%), 2 (direct), 3 (+33%)
- In range 2 (SA hub 2nd gear), goes from GI 50 to GI 100 with steps of 3-4 GI and no duplicate gears. This seems like a good everyday range, and it is the IGH's direct drive gear.
- In range 1 (SA hub 1st gear), goes from GI 37 to GI 75 with steps of 2.5-3.0 GI and no dupes. This seems good for steep or loaded climbs.
- In range 3 (SA hub 3rd gear), goes from GI 66 to GI 133, with steps of 5-6 GI, no dupes. This would be for tailwinds.
- I doubt I'd shift gears on the SA hub very often - more like "entering hills, shift to 1", pant, pant, pant for 20 minutes, then "leaving hills, shift to 2".
- Most of the time, all shifts would be on the derailleurs. Steps between adjacent gears would be about half the size of most steps using same cassette and a 53/39.

Perhaps traditional half step used wide range freewheel, because that's the only way to get a reasonably large range from lowest to highest. With the SA hub, that would not be a constraint.
That is my thinking, as well. This is an extension of my delightful old 3x4 setup, in which I had only 10 unique gears, because of two near-redundancies: top of IGH 1st to bottom of IGH 2nd, and top of IGH 2nd to bottom of IGH 3rd. Direct drive IGH 2nd was my default operating mode, although IGH 1st was great for accelerating from a stop, irrespective of the rear derailleur setting.
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Old 02-05-16, 10:40 AM
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This looks like a really fun project. Keep us up to date with more photos, please.
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Old 02-05-16, 10:53 AM
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Originally Posted by jyl
Played on St. Sheldon's calculator. Looks like 46/44 chainrings x 12-23 8-speed cassette x SA hub wide range gives


- In range 1 (SA hub 1st gear), goes from GI 37 to GI 75 with steps of 2.5-3.0 GI and no dupes. This seems good for steep or loaded climbs.
All those gears and the lowest you can go is 37 GI? That's not really much of a bailout for climbing with a load. I'd go up a couple cog sizes on the cassette. What would a 28T cog get you down to, for example?

Cool project; it'll be fun seeing it come together.
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Old 02-05-16, 12:24 PM
  #29  
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Originally Posted by Lascauxcaveman
All those gears and the lowest you can go is 37 GI? That's not really much of a bailout for climbing with a load. I'd go up a couple cog sizes on the cassette. What would a 28T cog get you down to, for example?

Cool project; it'll be fun seeing it come together.
Good point. 28T large cog gets me 31 GI lowest. I am not sure if the Grand Sport RD can do 28T but some quick reading suggests it can, so that might be a good choice.
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Old 02-05-16, 01:00 PM
  #30  
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@jyl, give some serious thought to adding a triplizer instead of an IGH.
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Old 02-05-16, 01:03 PM
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Originally Posted by jonwvara
Great project. I vote for not painting. I have never done a repaint that I didn't come to regret. It's impossible to regret not painting something, since you can always paint it later.
Sometimes I agree with this, but I've become un-purist. Since this will be heavily modded / hot-rodded rather than restored to vintage correct, I vote for repaint, but do a good job. A bad paint job is always regrettable.

IMHO, the coolest possible thing would be to rechrome it.

I kind of like that original blue color though, if it is original. What's going on with the red/orange patches though?

Bianchi trivia for those that don't know: Celeste was originally a light blue, and this is the color that the early Bianchis were painted. In Italian celeste quite literally means sky blue. Anyway, the clear coats yellowed, turning the blue into the seafoam green color we now know as celeste. People liked it, and they decided to go with that color on purpose.
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Old 02-05-16, 01:12 PM
  #32  
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Really neat project! I've been wanting to try a 650B build as well, so I'll be interested to follow along. I'm sort of in agreement with nlerner about the potential pitfalls of an IGH build. I'd be more tempted to get a long cage (would one of the refab'd SOMA NR long cages work on a gran sport derailleur?) and a wide-range FW and keep everything a bit simpler and lighter. I know you've said weight isn't such as concern, but once the bike gets loaded with all those other add-ons, you don't want that 30-35 pounds to start creeping up toward 40 pounds in your hilly environs. Or what about (sorry purists) triplizing the 151bcd cranks?: Triplizing a Campy Double Crankset

Sticking with drop bars or something more upright?
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Old 02-05-16, 01:17 PM
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Originally Posted by jyl
Good point. 28T large cog gets me 31 GI lowest. I am not sure if the Grand Sport RD can do 28T but some quick reading suggests it can, so that might be a good choice.
Now you're talking. Here's one datum that may or may not be helpful: my fake Lengnano velo-cheapo is flawlessly running a 52/40 up front with a 14-30 out back. Nuovo Gran Sport derailleurs and shifters.

Originally Posted by noglider
@jyl, give some serious thought to adding a triplizer instead of an IGH.
Really the simplest solution; and would save at least a pound, possibly two, but may not be workable if he's married to the idea of using the Gran Sport derailleurs. That's a bridge I should try crossing someday

For me, the only time I like the idea of an IGH is when I'm determined to run a single ring up front.
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Old 02-05-16, 01:22 PM
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Originally Posted by due ruote
Is there a way to add a small chainring to that crankset?

Cool project. You are clearly being thoughtful about it and have talented hands involved. Hope it turns out as good as you imagine. It will be fun to follow along.
I don't suppose someone makes a tripleizer that would work do they?

Edit: Whoops, looks like Tom and others beat me to it. Not that 48 gears doesn't sound awesome...
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Old 02-05-16, 02:29 PM
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Originally Posted by himespau
I don't suppose someone makes a tripleizer that would work do they?
Not for the very old school 151 chainrings... Popping it off and bolting on a Stronglight 49 crankset (etc) would be infinitely easier if you wanted to go triple.

I'm reasonably sure that the SOMA cage extender would work with a Gran Sport RD. They claim it does anyway.
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Old 02-05-16, 05:59 PM
  #36  
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Originally Posted by Salamandrine
Sometimes I agree with this, but I've become un-purist. Since this will be heavily modded / hot-rodded rather than restored to vintage correct, I vote for repaint, but do a good job. A bad paint job is always regrettable.

IMHO, the coolest possible thing would be to rechrome it.

I kind of like that original blue color though, if it is original. What's going on with the red/orange patches though?

Bianchi trivia for those that don't know: Celeste was originally a light blue, and this is the color that the early Bianchis were painted. In Italian celeste quite literally means sky blue. Anyway, the clear coats yellowed, turning the blue into the seafoam green color we now know as celeste. People liked it, and they decided to go with that color on purpose.
The red patches are reflective tape that the original owner must have put on. He rode the bike from home high in the Berkeley Hills, to work down on the flats by Highway 80, and back up the hill, from about 1963 to just several years ago. To appreciate the awesomeness of that, check out the original gearing.

I like the blue color, and Celeste would be incorrect for a US market Specialissima in 1961. But the pull of sea foam green is strong.

Rechroming would be terribly expensive, so it isn't in the cards now.

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Old 02-06-16, 12:00 PM
  #37  
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Originally Posted by trailangel
Ouch!If haven't already started I would try to talk you out of doing this to that bike.
Originally Posted by gugie
Sounds like this is devolving into a tire pressure thread...
Originally Posted by noglider
Is love for fat low pressure tires a function of age?
Hetres gonna hete
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Old 02-06-16, 12:25 PM
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Originally Posted by Darth Lefty
Hetres gonna hete
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Old 02-06-16, 08:50 PM
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Anyone know where to get Sun CR-18 rims in 584 mm (650B)?

I cannot find these online. Anywhere.
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Old 02-06-16, 09:06 PM
  #40  
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Originally Posted by jyl
Anyone know where to get Sun CR-18 rims in 584 mm (650B)?

I cannot find these online. Anywhere.
It looks like they are out of stock. (e.g., Sun Ringle CR18 650B/27.5" MTB Rim 32-Hole Silver | Bikewagon)
Their website only lists the inferno series in 27.5" (mountain rims) but nothing in 650B (road rims): Road | SUNringlé

Looks like a good project, btw.
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Old 02-07-16, 09:02 AM
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The first run of the 650b CR18 rims we're seriously fubar--oversized be a few mm, making it nearly impossible to mount tires. I had thought they discontinued them after that debacle.
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Old 02-07-16, 10:17 AM
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Originally Posted by jyl
What is a good 650B rim? Looking for shiny silver, wide enough for Hetres, 32 or 36H. I don't think I'm too concerned about aero profile. Maybe a budget choice and a "money is no object" choice?
SOMA Weymouth $60ea 540gm
V.O. Diagonale $69ea 550gm
Compass GB $98ea 468gm

I've built them all.

Those all fit the bill. You building them?
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Old 02-07-16, 10:55 AM
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I have 650B wheels with Velocity Synergy rims and Velocity A23 rims. But it looks like availability on those is spotty these days. Pacenti also did a PL23 that isn't availably any longer, but does show up on the re-sale market.
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Old 02-07-16, 06:06 PM
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Originally Posted by gugie
SOMA Weymouth $60ea 540gm
V.O. Diagonale $69ea 550gm
Compass GB $98ea 468gm

I've built them all.

Those all fit the bill. You building them?
Yes, self build. I like building and don't do it enough. Went to VC and looked at some examples, probably getting the VOs. BTW, heard negative feedback on Pacenti 650B rim's durability.
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Old 02-07-16, 06:09 PM
  #45  
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Originally Posted by gaucho777
Really neat project! I've been wanting to try a 650B build as well, so I'll be interested to follow along. I'm sort of in agreement with nlerner about the potential pitfalls of an IGH build. I'd be more tempted to get a long cage (would one of the refab'd SOMA NR long cages work on a gran sport derailleur?) and a wide-range FW and keep everything a bit simpler and lighter. I know you've said weight isn't such as concern, but once the bike gets loaded with all those other add-ons, you don't want that 30-35 pounds to start creeping up toward 40 pounds in your hilly environs. Or what about (sorry purists) triplizing the 151bcd cranks?: Triplizing a Campy Double Crankset

Sticking with drop bars or something more upright?
Drops for sure. I don't really like upright bars. On a mountain bike, okay for short rides, but my wrists get tired after a couple hours.
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Old 02-07-16, 06:19 PM
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@jyl - I highly encourage to stop by Sugar Wheel Works & speak to Jude or Jason. They have built thousands of wheels and will tell you how various rims build up. They can get you what you want in regard to rims. Very low pressure with excellent service.

I vote for Velocity A23 rims. Very elegant. I have used Dyads on most of my 27" to 700c wheel conversions and like the brushed silver vs high shine.

@gugie has great ideas and does sound & artistic work. I can't wait to see how this works out.

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Old 02-07-16, 08:53 PM
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Checked a spoke calculator. SA CS-RF3, VO Diagonale, 36H, 3 cross. Right spokes 269.5, left spokes 270.9, 60% tension ratio which would allow 100 kgf right, 60 kgf left. I guess I'd buy 270 and 272 mm spokes. Maybe DT Competition 2.0/1.8/2.0 silver. Brass nipples. I'll check another calculator but just using this. . .

This seems like a pretty straightforward build. I don't see a need to get an asymmetric rim (more expensive, not quite the look I want - because of the chrome socks and lugs on this bike, I'll polish the components as much as I can, and finish it of with high shine rims.)

I could use DT Revolution spokes 2.0/1.5/2.0 on the left side to even out the tension a bit.

Front hub will probably be Shutter Precision. Just because I like the shiny finish (superficial much?).

(Edit) @Velocivixen, thanks for the pointer to Sugar. They have a great reputation. The thing is, I'm unlikely to buy the components from them (I usually go for discounts) and I try not to use up the time of a shop if I'm not going to spend money there.

Last edited by jyl; 02-07-16 at 11:00 PM.
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Old 02-07-16, 10:23 PM
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Originally Posted by jyl
Yes, self build. I like building and don't do it enough. Went to VC and looked at some examples, probably getting the VOs. BTW, heard negative feedback on Pacenti 650B rim's durability.
The VO's build up just fine, they're on my Weigelized Competition, look good, and have worked well on two trips. I weight 205, and carry 25-30 lbs when credit card touring. Hetres fit loose on them, you have to work them seated, and I can't see anyone needing tire levers to put them on or take them off. I got a pair of 32 hole Pacenti SL23's on sale for my International, lighter, and feels pretty stiff. Hetres are hard to mount on the SL23's, and although I pride myself on not needing tire levers to put tires on or take them off, I need them to remove the tire, and damn near raise blisters putting them on. The Pacentis have an extremely narrow braking area.
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Old 02-07-16, 10:28 PM
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Originally Posted by jyl
Checked a spoke calculator. SA CS-RF3, VO Diagonale, 36H, 3 cross. Right spokes 269.5, left spokes 270.9, 60% tension ratio which would allow 100 kgf right, 60 kgf left. I guess I'd buy 270 and 272 mm spokes. Maybe DT Competition 2.0/1.8/2.0 silver. Brass nipples. I'll check another calculator but just using this. . .

This seems like a pretty straightforward build. I don't see a need to get an asymmetric rim (more expensive, not quite the look I want - because of the chrome socks and lugs on this bike, I'll polish the components as much as I can, and finish it of with high shine rims.)

I could use DT Revolution spokes 2.0/1.5/2.0 on the left side to even out the tension a bit.

Front hub will probably be Shutter Precision. Just because I like the shiny finish (superficial much?).
Sapim, Wheelsmith, or DT DB, all will build up fine. I think the Shutter Precision is the best value for a generator hub. The SON is a bit better, and a LOT more expensive. It'll look real nice with those chrome socks.
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Old 02-07-16, 10:29 PM
  #50  
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Bikes: It's complicated.

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Originally Posted by Velocivixen
@jyl - I highly encourage to stop by Sugar Wheel Works & speak to Jude or Jason. They have built thousands of wheels and will tell you how various rims build up. They can get you what you want in regard to rims. Very low pressure with excellent service.

I vote for Velocity A23 rims. Very elegant. I have used Dyads on most of my 27" to 700c wheel conversions and like the brushed silver vs high shine.

@gugie has great ideas and does sound & artistic work. I can't wait to see how this works out.
A23's or Dyads are next on my list to try!
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