Campagnolo Rear Axle Question
08-23-20, 01:17 PM
#1
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Campagnolo Rear Axle Question
I have a criminal habit if taking things apart and not putting them back together. Three of my victims are some rear Campy rear hubs, Nuovo Record Low Flange (French) , Nuovo Record High Flange (English) and Tippo High Flange (English)
The loose axles are as follows:
BREV. CAMPAGNOLO 126.8 mm (SILVER)
BREV. CAMPAGNOLO 129.0 mm (SILVER)
BREV. INTER. CAMP. 134.0 mm (BLACK)
I dug these out because I'm building up an old 1970's Falcon. I will be using the TIPPO High Flange hubs with a 5 cog freewheel. The dropout spacing will be 120mm, the Campy (stamped steel) dropouts are each 5mm thick, total is 130mm so it looks like the 129mm axle will work. I'm guessing the 134mm axle would work if the dropouts were forged, my Holdsworth dropouts are 7mm thick, 120mm + 14mm = 134mm.
My question is, what is the 126.8mm axle used for? It came out of one of the 3 hub-shells I listed but have no idea which one or if it's original to the hub.
Also, what is the difference between the silver axles and black axle?
...
The loose axles are as follows:
BREV. CAMPAGNOLO 126.8 mm (SILVER)
BREV. CAMPAGNOLO 129.0 mm (SILVER)
BREV. INTER. CAMP. 134.0 mm (BLACK)
I dug these out because I'm building up an old 1970's Falcon. I will be using the TIPPO High Flange hubs with a 5 cog freewheel. The dropout spacing will be 120mm, the Campy (stamped steel) dropouts are each 5mm thick, total is 130mm so it looks like the 129mm axle will work. I'm guessing the 134mm axle would work if the dropouts were forged, my Holdsworth dropouts are 7mm thick, 120mm + 14mm = 134mm.
My question is, what is the 126.8mm axle used for? It came out of one of the 3 hub-shells I listed but have no idea which one or if it's original to the hub.
Also, what is the difference between the silver axles and black axle?
...
Last edited by branko_76; 08-23-20 at 01:34 PM.
08-23-20, 01:39 PM
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The 127 mm axle would be ample for a 120 mm OLD hub for any frame, as you don’t need more than a few mm of axle protruding beyond the locknut, regardless of the thickness of the dropouts. Because the stock axle for a QR typically is 11 mm longer than the OLD, the short axle is possibly a replacement (or shortened due to mangled threads.) But it’ll be fine.
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08-23-20, 01:41 PM
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branko_76 Keep in mind that you do not want the axles sticking out past the drop out! They should be a little short. IIRC, Sheldon suggested that you only need enough to locate the axle in the drop out, even one or two threads as the QR is what holds it in place. The axle in the DO is a locator and not a significant structural interface.
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08-23-20, 05:21 PM
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I need at least 3mm on each side to have that warm, fuzzy feeling.
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08-23-20, 05:28 PM
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I bought replacement Campag pattern axles through my local bike shop supplied by: ,
https://wheelsmfg.com/products/hub-parts/all-axles.html
https://wheelsmfg.com/products/hub-parts/all-axles.html
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08-23-20, 05:35 PM
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the 126.8 was probably off the tipo hub as bikes that received those hubs may not have had forged dropouts, they were thinner.
Now, you have to mix and match the cones, spacers and locknuts...
Now, you have to mix and match the cones, spacers and locknuts...
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08-23-20, 07:14 PM
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3mm is a very nice number. And the axle does indeed assist in maintaining the position of the wheel - it too decides where the QR clamps and then the QR makes sure the axle stays where it is supposed to be. Sorta pushmepullyou
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