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Recreational Cyclocross and Gravelbiking This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

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Old 05-13-10, 07:28 PM   #1
curt_k
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Is it possible -- convert a Bianchi San jose to a 1x8 / 1x9?

Using a rear derailleur and cassette, that is -- Is this possible?

I think there's a bolt on rear derailleur hanger out there, but what about spacing, etc.?


I got a San Jose on hand that I'd like to use for some recreational group road rides and have some fun with some cyclocross races. Not a lot of hills here, but SS isn't going to hold up well for the road rides, I can barely keep up with gears on a road bike, so....

Thanks
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Old 05-13-10, 07:37 PM   #2
flargle
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A better idea:
http://www.sheldonbrown.com/harris/b...os8/index.html
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Old 05-13-10, 10:24 PM   #3
B17
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I bought a brand new San Jose frame on eBay and had it modded for gears a couple months ago by Yellow Jersey in Madison, WI. They charged me like $115.00 to braze on a derailleur hanger and two threaded head tube cable guides and a driveside chainstay guide, tap the BB shell for a plastic guide (they included the guide and the screw) AND return shipping, IIRC. The work was fine and quick- about a week from when they got it I had it back. Total set me back about $150 with initial shipping, packing stuff, etc. Of course, the dealbreaker for many would be that the brazing means a refinish (in progress) but the frame's not expensive or valuable enough to be shamed by rattlecan paint. I didn't like the original color (red, white panels) anyhow.

Anyhow, I love the frame. Not spendy tubing but it's light enough to suit my needs.

No digital camera to show you pics, but I wanted to point it out because YJ does it for a LOT less than pretty much everyone else I talked to about it (they told me that they do a lot of this stuff every day so they're set up for it and it costs less) and it might be within your price range. Also, it allows you to use both derailleurs without all that cable housing and zipties. It solves any spacing concerns you may have.

I don't know what your frame's spacing is, but mine is 132.5 at the front of the track ends (closest to the seatpost).
I don't know if that was Bianchi's intent or not.
If not, yours is probably either 130 or 135.

Last edited by B17; 05-13-10 at 10:29 PM.
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Old 05-17-10, 01:08 PM   #4
curt_k
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*Very* interesting and helpful. Thanks very much
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Old 05-19-10, 11:43 AM   #5
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I also have a San Jose, and while I like the single speed, I have at times thought about a 1x8 or 1x9 conversion. The way B17 did it sounds like the "proper" way to do it. If you want to do it on the cheap, you can get tugnuts with a hanger here: http://www.treefortbikes.com/product...erailleur.html

Seems like this would be more easily reversible it that matters to you, and would not require a repaint.

I like the San Jos8 concept from Harris as well. Keep us posted, whatever you do.
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Old 05-19-10, 06:22 PM   #6
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An even less expensive option is this:



http://www.bikeparts.com/search_resu...p?ID=BPC109497

I have no idea how well it works.
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Old 05-29-10, 02:42 AM   #7
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Its better to convert it to IGH. The track dropouts make it possible to do that if you're so inclined... since few people tour on a singlespeed.
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